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3. Haze in Pluto's atmosphere: Results from SOFIA and ground-based observations of the 2015 June 29 Pluto occultation

Author

Person, Michael J., Bosh, Amanda S., Zuluaga, Carlos A., Sickafoose, Amanda A., Levine, Stephen E., Pasachoff, Jay M., Babcock, Bryce A., Dunham, Edward W., McLean, Ian S., Wolf, Jürgen, Abe, Fumio, Becklin, E.E., Bida, Thomas A., Bright, Len P., Brothers, Tim, Christie, Grant, Durst, Rebecca F., Gilmore, Alan C., Hamilton, Ryan T., Harris, Hugh C., Johnson, Chris, Kilmartin, Pamela M., Kosiarek, Molly, Leppik, Karina, Logsdon, Sarah E., Lucas, Robert, Mathers, Shevill, Morley, C.J.K., Nelson, Peter, Ngan, Haydn, Pfüller, Enrico, Natusch, Tim, Sallum, Stephanie, Savage, Maureen L., Seeger, Christina H., Siu, Ho Chit, Stockdale, Chris, Suzuki, Daisuke, Thanathibodee, Thanawuth, Tilleman, Trudy, Tristram, Paul J., Vacca, William D., Van Cleve, Jeffrey, Varughese, Carolle, Weisenbach, Luke W., Widen, Elizabeth, and Wiedemann, Manuel more...

Published
2021
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8. Photogeologic Map of the Perseverance Rover Field Site in Jezero Crater Constructed by the Mars 2020 Science Team

Author

Stack, Kathryn M., Williams, Nathan R., Calef, III, Fred, Sun, Vivian Z., Williford, Kenneth H., Farley, Kenneth A., Eide, Sigurd, Flannery, David, Hughes, Cory, Jacob, Samantha R., Kah, Linda C., Meyen, Forrest, Molina, Antonio, Nataf, Cathy Quantin, Rice, Melissa, Russell, Patrick, Scheller, Eva, Seeger, Christina H., Abbey, William J., Adler, Jacob B., Amundsen, Hans, Anderson, Ryan B., Angel, Stanley M., Arana, Gorka, Atkins, James, Barrington, Megan, Berger, Tor, Borden, Rose, Boring, Beau, Brown, Adrian, Carrier, Brandi L., Conrad, Pamela, Dypvik, Henning, Fagents, Sarah A., Gallegos, Zachary E., Garczynski, Brad, Golder, Keenan, Gomez, Felipe, Goreva, Yulia, Gupta, Sanjeev, Hamran, Svein-Erik, Hicks, Taryn, Hinterman, Eric D., Horgan, Briony N., Hurowitz, Joel, Johnson, Jeffrey R., Lasue, Jeremie, Kronyak, Rachel E., Liu, Yang, Madariaga, Juan Manuel, Mangold, Nicolas, McClean, John, Miklusicak, Noah, Nunes, Daniel, Rojas, Corrine, Runyon, Kirby, Schmitz, Nicole, Scudder, Noel, Shaver, Emily, SooHoo, Jason, Spaulding, Russell, Stanish, Evan, Tamppari, Leslie K., Tice, Michael M., Turenne, Nathalie, Willis, Peter A., and Aileen Yingst, R. more...

Published
2020
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10. Pulmonary edema after naloxone administration for opioid reversal: a systematic review of case reports and causality assessment using the Naranjo scale.

Author

Joseph, Merlyn, Amin, Khyati, Siddens, Courtney, Jaime, Gil, Seeger, Christina M., Mercer, Kevin, and Chau, Terence

Subjects
PULMONARY edema, DRUG administration, NALOXONE, RESPIRATORY obstructions, DISEASE risk factors, OPIOID analgesics
Abstract

Pulmonary edema is a rare complication occurring after naloxone administration, but the causal relationship remains insufficiently investigated. We aimed to determine the likelihood of naloxone as the causative agent in published cases of pulmonary edema. A literature search was conducted across multiple databases, utilizing database-specific search terms such as "pulmonary edema/chemically induced" and "naloxone/adverse effects." Each case report was evaluated using the Naranjo scale, a standardized causality assessment algorithm. We identified 49 published case reports of pulmonary edema following naloxone administration. The median total dose of naloxone was 0.2 mg for patients presenting following a surgical procedure and 4 mg for out-of-hospital opioid overdoses. Based on the Naranjo scale, the majority of cases were classified as "possible" (n = 38) or "probable" (n = 11) adverse reactions, while no "definite" cases of naloxone-induced pulmonary edema were identified. Many patients were classified as "possible" due to limited patient information or other potential risks, such as fluid administration or airway obstruction. Forty-six of 49 patients survived (94 percent). Pulmonary edema may occur after both low and high doses of naloxone; however, low doses were primarily reported in the surgical population. Despite this complication, the majority of patients survived. Furthermore, no case report in our analysis was classified as a "definite" case of naloxone-induced pulmonary edema which limits the establishment of causality. Future studies should explore patient risk factors, including surgical versus outpatient setting and opioid-naïve versus opioid-tolerant for developing pulmonary edema and employ a causality assessment algorithm. These case reports suggest pulmonary edema can occur following naloxone administration, irrespective of dose. According to the Naranjo scale, there were no definite cases of naloxone-induced pulmonary edema. Overall, we suggest the benefits of naloxone administration outweigh the risks. Naloxone should be administered to treat opioid overdoses while monitoring for the development of pulmonary edema. [ABSTRACT FROM AUTHOR] more...

Published
2024
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11. Manganese-Iron Phosphate Nodules at the Groken Site, Gale Crater, Mars

Author

Treiman, Allan H., primary, Lanza, Nina L., additional, VanBommel, Scott, additional, Berger, Jeff, additional, Wiens, Roger, additional, Bristow, Thomas, additional, Johnson, Jeffrey, additional, Rice, Melissa, additional, Hart, Reginald, additional, McAdam, Amy, additional, Gasda, Patrick, additional, Meslin, Pierre-Yves, additional, Yen, Albert, additional, Williams, Amy J., additional, Vasavada, Ashwin, additional, Vaniman, David, additional, Tu, Valerie, additional, Thorpe, Michael, additional, Swanner, Elizabeth D., additional, Seeger, Christina, additional, Schwenzer, Susanne P., additional, Schröder, Susanne, additional, Rampe, Elizabeth, additional, Rapin, William, additional, Ralston, Silas J., additional, Peretyazhko, Tanya, additional, Newsom, Horton, additional, Morris, Richard V., additional, Ming, Douglas, additional, Loche, Matteo, additional, Le Mouélic, Stéphane, additional, House, Christopher, additional, Hazen, Robert, additional, Grotzinger, John P., additional, Gellert, Ralf, additional, Gasnault, Olivier, additional, Fischer, Woodward W., additional, Essunfeld, Ari, additional, Downs, Robert T., additional, Downs, Gordon W., additional, Dehouck, Erwin, additional, Crossey, Laura J., additional, Cousin, Agnes, additional, Comellas, Jade M., additional, Clark, Joanna V., additional, Clark, Benton, additional, Chipera, Steve, additional, Caravaca, Gwenaël, additional, Bridges, John, additional, Blake, David F., additional, and Anderson, Ryan, additional more...

Published
2023
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12. Physical Sedimentology and Stratigraphy of the lower Western Fan (Shenandoah formation) Jezero Crater, Mars:: Results from the Mars 2020 'Delta Front' Campaign

Author

Ives, Libby, Stack‐Morgan, Katie, Gupta, Sanjeev, Caravaca, Gwénaël, Russell, Patrick, Shuster, David L., Williams, Amy, Holm-Alwmark, Sanna, Barnes, Robert, Bell, Jim F., Beyssac, Olivier, Brown, Adrian, Flannery, David, Frydenvang, Jens, Grotzinger, John, Lamb, Michael P., Horgan, Briony, Hurowitz, Joel A., Kalucha, Hemani, Kanine, Oak, Núñez, Jorge, Randazzo, Nicolas, Seeger, Christina, Simon, Justin I., Tice, Michael M., Tebolt, Michelle, Kah, Linda C., Williams, Rebecca M.E., Amundsen, Hans, Annex, Andrew M., Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Department of Earth Science and Engineering [Imperial College London], Imperial College London, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Department of Earth, Planetary and Space Sciences [Los Angeles] (EPSS), University of California [Los Angeles] (UCLA), University of California (UC)-University of California (UC), Berkeley Geochronology Center (BGC), Department of Geological Sciences [Gainesville] (UF|Geological), University of Florida [Gainesville] (UF), University of Copenhagen = Københavns Universitet (UCPH), Arizona State University [Tempe] (ASU), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), NASA Headquarters, Queensland University of Technology [Brisbane] (QUT), Division of Geological and Planetary Sciences [Pasadena], California Institute of Technology (CALTECH), Purdue University [West Lafayette], Department of Geosciences [Stony Brook], Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY), Johns Hopkins University Applied Physics Laboratory [Laurel, MD] (APL), University of Alberta, NASA Johnson Space Center (JSC), NASA, Texas A&M University [College Station], University of Texas at Austin [Austin], Department of Earth and Planetary Sciences [Knoxville], The University of Tennessee [Knoxville], Planetary Science Institute [Tucson] (PSI), and Vestfonna Geophysical more...

Subjects
jezero crater, delta, [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, Shenandoah formatin, [SDU]Sciences of the Universe [physics], [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, Mars 2020, perseverance, Mars, sedimentology, stratigraphy, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Abstract

International audience; The Perseverance rover is exploring a sedimentary deposit within the Late Noachian-aged (4.0-4.8 Ga) Jezero Crater interpreted to be the remnants of a delta. From April 2022 through February 2023, Perseverance investigated the basal 25 m of sediments exposed in the fan’s eastern scarp. Rover instruments collected a suite of imaging, geochemical, mineralogical, and ground-penetrating radar data.Perseverance made detailed observations through two sections of the lower fan ~600 m apart. Similar facies and stratigraphic trends are present in both sections. Each section contains two coarsening-up successions. While some finer-grained units are laterally continuous between the two sections, the coarser-grained bodies that cap each section are laterally discontinuous and do not extend between sections.Both sequences are 10 - 15 m thick. Their lower strata are dominated by sulfate-cemented, planar laminated, very fine- to medium-grained sandstone and siltstone with rare low-angle truncations. Soft-sediment deformation occurs in the form of decimeter-scale lateral folds. Laminae are normally graded. These sequences are capped by meter-scale thick sheets of coarse-grained sandstone, pebbly sandstones, and conglomerates that are variably low-angle cross-bedded, trough cross-bedded, and planar-stratified. Plane beds are massive or normally graded.Two hypotheses for the depositional environment have emerged for this succession: a sub-aerial setting with extensive “overbank” facies and shallow braided channels and a proximal pro-deltaic setting with deposition driven by hyperpycnal flows. These hypotheses will be tested against observations made by Perseverance as it traverses the “Fan Top” and by more comprehensive studies of the “Delta Front” data. more...

Published
2023

14. 'HIGH' BUT NOT SO DRY ON AEOLIS MONS:: TRANSIENT LAKE SYSTEMS IN HESPERIAN DESERTS IN GALE CRATER

Author

Gupta, Sanjeev, Dietrich, William, Lewis, Kevin W., Kite, Edwin, Mondro, C. A., Schieber, Juergen, Weitz, Catherine, Bryk, Alexander, Edgar, Lauren, Fedo, Christopher, Rubin, David M., Williams, Rebecca M.E., Rapin, William, Caravaca, Gwénaël, Roberts, Amelie, Seeger, Christina, Grotzinger, John, Lamb, Michael P., Cowart, Aster, Davis, Joel, Banham, Steven, Grant, John A., Yingst, R., Minitti, Michelle, Fey, Deirdra M., Kubacki, Tex, Vasavada, Ashwin, Fraeman, Abigail, Department of Earth Science and Engineering [Imperial College London], Imperial College London, Department of Earth and Planetary Science [UC Berkeley] (EPS), University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), Johns Hopkins University (JHU), University of Chicago, Division of Geological and Planetary Sciences [Pasadena], California Institute of Technology (CALTECH), Indiana University [Bloomington], Indiana University System, Planetary Science Institute [Tucson] (PSI), Astrogeology Science Center [Flagstaff], United States Geological Survey [Reston] (USGS), Department of Earth and Planetary Sciences [Knoxville], The University of Tennessee [Knoxville], University of California [Santa Cruz] (UC Santa Cruz), University of California (UC), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Birkbeck College [University of London], Smithsonian Institution, Malin Space Science Systems (MSSS), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), and Lunar and Planetary Institute more...

Subjects
marker band, [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU]Sciences of the Universe [physics], [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, Mars, stratigraphy, sedimentology, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, MSL, Gale crater
Abstract

International audience; The stratigraphy preserved within Aeolis Mons in Gale crater (Mars) shows a major transition from a phyllosilicate-bearing unit, which in situ data show is composed of mudstone-rich strata (with subordinate sandstones) recording deposition in lacustrine to fluvial settings into a major sulfatebearingunit that is hundreds of meters thick (the Layered Sulfate-bearing unit (LSu)) [1,2,3,4]. The origin of the LSu unit is not yet constrained.Comparison to other terrains on Mars has led to the hypothesis that the transition from clay minerals to sulfates records a planet-wide change in climate from relatively warm and wet to cold and arid [1]. A leading question is whether this transition is so unidirectional. The lower section of the LSu (claysulphate transition stratigraphy) contains strongy diagenetically altered strata or stacked, cross-bedded facies (Dunnideer and Port Logan mbs of the Mirador fm) that likely records a purely dry aeolian dune environment [5]. However, higher up in the studied section within the Contigo member, we observe sandstone lenses interstratified within aeolian strata that show distinctive sedimentary structures indicative of deposition by lacustrine and fluvial processes in shallow interdune depressions [6]. In late 2022, Curiosity investigated a distinctive dark-toned, resistant unit even higher within the sulfate-bearing stratigraphy of Aeolis Mons – the “Marker Band” [1,4,7,8]. Stratigraphically it has been informally designated the Amapari member of the Mirador formation (Mt. Sharp gp). This unit can be traced for tens of kilometers around Aeolis Mons [7], and from early in the mission was considered an important geologic target for investigation [1]. The key question concerning the “Marker Band” is what geological process led to its formation and how does it relate to the Layered Sulfate-bearing unit. Orbital-scale observations led to favored interpretations of the “Marker Band” as a volcanic ash deposit or a more indurated sulfate unit [7]. The first edge-on view in the distance favored an eolian deflation surface [3]. Here we describe the sedimentology of unit and go on to discuss initial implications for paleoenvironmental and paleoclimatic interpretations. more...

Published
2023

15. THE MARKER BAND IN GALE CRATER:: A SYNTHESIS OF ORBITAL AND GROUND OBSERVATIONS

Author

Weitz, Catherine, Lewis, Kevin W., Kite, Edwin, Dietrich, William, Thompson, Lucy M., O’connell-Cooper, Catherine, Schieber, Juergen, Rubin, David M., Gasda, Patrick, Mondro, C. A., Seeger, Christina, Rapin, William, Gupta, Sanjeev, Roberts, Amelie, Frydenvang, Jens, Berger, Jeff, Newsom, Horton, Bryk, Alexander, Lamb, Michael P., Grotzinger, John, Fischer, W., Cowart, Aster, Davis, Joel, Grant, John A., Aileen Yingst, R., Farrand, William, Parker, Tim, Vasavada, Ashwin, Fraeman, Abigail, Milliken, Ralph, Sheppard, Rachel, Minitti, Michelle, Ming, Douglas W., Simpson, Sarah, Rampe, Elizabeth B., Mclennan, Scott, Fey, Deirdra M., Kubacki, Tex, Williams, Rebecca M.E., Arvidson, Ray, Caravaca, Gwénaël, Planetary Science Institute [Tucson] (PSI), Johns Hopkins University (JHU), University of Chicago, Department of Earth and Planetary Science [UC Berkeley] (EPS), University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), University of New Brunswick (UNB), Indiana University [Bloomington], Indiana University System, University of California [Santa Cruz] (UC Santa Cruz), University of California (UC), Los Alamos National Laboratory (LANL), Division of Geological and Planetary Sciences [Pasadena], California Institute of Technology (CALTECH), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Department of Earth Science and Engineering [Imperial College London], Imperial College London, University of Copenhagen = Københavns Universitet (UCPH), NASA Johnson Space Center (JSC), NASA, The University of New Mexico [Albuquerque], GeoRessources, Institut national des sciences de l'Univers (INSU - CNRS)-Centre de recherches sur la géologie des matières premières minérales et énergétiques (CREGU)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Birkbeck College [University of London], Smithsonian Institution, Space Science Institute [Boulder] (SSI), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Brown University, Planetary Geosciences Institute [Knoxville], Department of Earth and Planetary Sciences [Knoxville], The University of Tennessee [Knoxville]-The University of Tennessee [Knoxville], Stony Brook University [SUNY] (SBU), State University of New York (SUNY), Malin Space Science Systems (MSSS), Department of Earth and Planetary Sciences [St Louis], Washington University in Saint Louis (WUSTL), and Lunar and Planetary Institute more...

Subjects
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU]Sciences of the Universe [physics], [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, Mars, sedimentology, stratigraphy, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, MSL, Marker Band, Gale crater, mineralogy
Abstract

International audience; The “Marker Band” (previously called the Marker Bed and Marker Horizon [1-4]) in Gale crater is a distinctive indurated and dark-toned unit observed in the strata of Mount Sharp. From orbital data, the Marker Band (MB) was mapped across much of the western and southern edges of Mount Sharp, spanning over 80 km in distance and 1.6 km in elevation [4]. CRISM spectra of the MB show no hydration signatures and broad absorptions around~1 and 2 μm interpreted to be from high-Ca pyroxene [4]. Favored origins for the MB based upon orbital observations included a more indurated sulfate, a sandstone, and a volcanic ash deposit. The Curiosity rover recently reached the MB and is now collecting critical in situ measurements to test these postulated and other origins and make new discoveries at the finer mm- to cm-scale that could not be assessed from orbital data. Here we provide a summary of several of the most crucial MB observations made by the rover thus far from sols 3640-3645 and 3668-present. more...

Published
2023

16. SEDIMENTOLOGY AND STRATIGRAPHY OF THE LOWER DELTA SEQUENCE, JEZERO CRATER,MARS

Author

Stack‐Morgan, Katie, Gupta, Sanjeev, Tebolt, Michelle, Caravaca, Gwénaël, Ives, Libby, Russell, Patrick, Shuster, David L., Williams, Amy, Holm-Alwmark, Sanna, Barnes, Robert, Bell, Jim F., Beyssac, Olivier, Brown, Adrian, Flannery, David, Grotzinger, John, Horgan, Briony, Hurowitz, Joel, Kalucha, Hemani, Kanine, Oak, Núñez, Jorge, Randazzo, Nicolas, Seeger, Christina, Simon, Justin I., Tice, Michael M., Williams, Rebecca M.E., Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Department of Earth Science and Engineering [Imperial College London], Imperial College London, University of Texas at Austin [Austin], Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Department of Earth, Planetary and Space Sciences [Los Angeles] (EPSS), University of California [Los Angeles] (UCLA), University of California (UC)-University of California (UC), Berkeley Geochronology Center (BGC), Department of Geological Sciences [Gainesville] (UF|Geological), University of Florida [Gainesville] (UF), University of Copenhagen = Københavns Universitet (UCPH), Arizona State University [Tempe] (ASU), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), NASA Headquarters, Plancius Research LLC, Queensland University of Technology [Brisbane] (QUT), Division of Geological and Planetary Sciences [Pasadena], California Institute of Technology (CALTECH), Purdue University [West Lafayette], Department of Geosciences [Stony Brook], Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY), Johns Hopkins University Applied Physics Laboratory [Laurel, MD] (APL), University of Alberta, NASA Johnson Space Center (JSC), NASA, Texas A&M University [College Station], Planetary Science Institute [Tucson] (PSI), and Lunar and Planetary Institute more...

Subjects
Jezero crater, delta, [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU]Sciences of the Universe [physics], shenandoah formation, [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, Mars 2020, Mars, stratigraphy, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Sedimentology
Abstract

International audience; In April 2022, the Mars 2020 Perseverance rover arrived at the base of the ancient delta in Jezero crater after completing the first year of its mission exploring and sampling aqueously altered igneous rocks of the present-day crater floor [1]. Perseverance then spent ~200 sols exploring the lower ~25 m of rock exposed within the eastern scarp of the Jezero delta [2], a sedimentary sequence informally named the ‘Shenandoah’ formation. This studydescribes the sedimentology and stratigraphy of the Shenandoah formation explored by Perseverance at two sections—'Cape Nukshak’ and ‘Hawksbill Gap’— including a description, interpretation, and depositional framework for the facies that comprise it. more...

Published
2023

18. Mineralogy of a Possible Ancient Lakeshore in the Sutton Island Member of Mt. Sharp, Gale Crater, Mars, From Mastcam Multispectral Images

Author

Haber, James T., primary, Horgan, Briony, additional, Fraeman, Abigail A., additional, Johnson, Jeffrey R., additional, Bell, Jim F., additional, Rice, Melissa S., additional, Seeger, Christina, additional, Mangold, Nicolas, additional, Thompson, Lucy, additional, Wellington, Danika, additional, Cloutis, Ed, additional, and Jacob, Samantha, additional more...

Published
2022
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19. Meeting Our Users where They Conference: A Texas A&M Model to Support Librarian Attendance at Subject-Specific Conferences

Author

Hankins, Rebecca, Melgoza, Pauline, Seeger, Christina, and Wan, Gary

Abstract

Today's academic librarian is frequently called upon to function as a subject specialist, with or without advanced degrees in other disciplines. One method of monitoring trends within a given field is to study its literature; another is to attend conferences in the discipline. Discipline-specific conference attendance by academic librarians provides opportunities to interact with faculty in their disciplines that result in an increased communication with faculty, improved reference expertise, and more focused collection development. This paper describes the Texas A&M University Libraries' support for conference attendance and examples of the resulting benefits. more...

Published
2009
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21. Spectral Diversity of Rocks and Soils in Mastcam Observations Along the Curiosity Rover's Traverse in Gale Crater, Mars

Author

Rice, Melissa S., primary, Seeger, Christina, additional, Bell, Jim, additional, Calef, Fred, additional, St. Clair, Michael, additional, Eng, Alivia, additional, Fraeman, Abigail A., additional, Hughes, Cory, additional, Horgan, Briony, additional, Jacob, Samantha, additional, Johnson, Jeff, additional, Kerner, Hannah, additional, Kinch, Kjartan, additional, Lemmon, Mark, additional, Million, Chase, additional, Starr, Mason, additional, and Wellington, Danika, additional more...

Published
2022
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22. Spectral Diversity of Rocks and Soils in Mastcam Observations Along the Curiosity Rover's Traverse in Gale Crater, Mars

Author

Rice, Melissa S., Seeger, Christina, Bell, Jim, Calef, Fred, St Clair, Michael, Eng, Alivia, Fraeman, Abigail A., Hughes, Cory, Horgan, Briony, Jacob, Samantha, Johnson, Jeff, Kerner, Hannah, Kinch, Kjartan, Lemmon, Mark, Million, Chase, Starr, Mason, Wellington, Danika, Rice, Melissa S., Seeger, Christina, Bell, Jim, Calef, Fred, St Clair, Michael, Eng, Alivia, Fraeman, Abigail A., Hughes, Cory, Horgan, Briony, Jacob, Samantha, Johnson, Jeff, Kerner, Hannah, Kinch, Kjartan, Lemmon, Mark, Million, Chase, Starr, Mason, and Wellington, Danika more...

Abstract

The Mars Science Laboratory Curiosity rover has explored over 400 m of vertical stratigraphy within Gale crater to date. These fluvio-deltaic, lacustrine, and aeolian strata have been well-documented by Curiosity's in situ and remote science instruments, including the Mast Camera (Mastcam) pair of multispectral imagers. Mastcam visible to near-infrared spectra can broadly distinguish between iron phases and oxidation states, and in combination with chemical data from other instruments, Mastcam spectra can help constrain mineralogy, depositional origin, and diagenesis. However, no traverse-scale analysis of Mastcam multispectral data has yet been performed. We compiled a database of Mastcam spectra from >600 multispectral observations and quantified spectral variations across Curiosity's traverse through Vera Rubin ridge (sols 0-2302). From principal component analysis and an examination of spectral parameters, we identified nine rock spectral classes and five soil spectral classes. Rock classes are dominated by spectral differences attributed to hematite and other oxides (due to variations in grain size, composition, and abundance) and are mostly confined to specific stratigraphic members. Soil classes fall along a mixing line between soil spectra dominated by fine-grained Fe-oxides and those dominated by olivine-bearing sands. By comparing trends in soil versus rock spectra, we find that locally derived sediments are not significantly contributing to the spectra of soils. Rather, varying contributions of dark, mafic sands from the active Bagnold Dune field is the primary spectral characteristic of soils. These spectral classes and their trends with stratigraphy provide a basis for comparison in Curiosity's ongoing exploration of Gale crater. more...

Published
2022

23. Spectral diversity of rocks and soils in Mastcam observations along the Curiosity rover’s traverse in Gale crater, Mars

Author

Rice, Melissa, primary, Seeger, Christina, additional, Bell, Jim, additional, Calef, Fred, additional, St. Clair, Michael, additional, Eng, Alivia, additional, Fraeman, Abigail, additional, Hughes, Cory, additional, Horgan, Briony, additional, Jacob, Samantha, additional, Johnson, Jeff, additional, Kerner, Hannah, additional, Kinch, Kjartan, additional, Lemmon, Mark, additional, Million, Chase, additional, Starr, Mason, additional, and Wellington, Danika, additional more...

Published
2022
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24. Photogeologic Map of the Perseverance Rover Field Site in Jezero Crater Constructed by the Mars 2020 Science Team

Author

Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences, Stack, Kathryn M., Williams, Nathan R., Calef, Fred, Sun, Vivian Z., Williford, Kenneth H., Farley, Kenneth A., Eide, Sigurd, Flannery, David, Hughes, Cory, Jacob, Samantha R., Kah, Linda C., Meyen, Forrest, Molina, Antonio, Nataf, Cathy Quantin, Rice, Melissa, Russell, Patrick, Scheller, Eva, Seeger, Christina H., Abbey, William J., Adler, Jacob B., Amundsen, Hans, Anderson, Ryan B., Angel, Stanley M., Arana, Gorka, Atkins, James, Barrington, Megan, Berger, Tor, Borden, Rose, Boring, Beau, Brown, Adrian, Carrier, Brandi L., Conrad, Pamela, Dypvik, Henning, Fagents, Sarah A., Gallegos, Zachary E., Garczynski, Brad, Golder, Keenan, Gomez, Felipe, Goreva, Yulia, Gupta, Sanjeev, Hamran, Svein-Erik, Hicks, Taryn, Hinterman, Eric Daniel, Horgan, Briony N., Hurowitz, Joel, Johnson, Jeffrey R., Lasue, Jeremie, Kronyak, Rachel E., Liu, Yang, Madariaga, Juan Manuel, Mangold, Nicolas, McClean, John, Miklusicak, Noah, Nunes, Daniel, Rojas, Corrine, Runyon, Kirby, Schmitz, Nicole, Scudder, Noel, Shaver, Emily, SooHoo, Jason G., Spaulding, Russell, Stanish, Evan, Tamppari, Leslie K., Tice, Michael M., Turenne, Nathalie, Willis, Peter A., Aileen Yingst, R., Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences, Stack, Kathryn M., Williams, Nathan R., Calef, Fred, Sun, Vivian Z., Williford, Kenneth H., Farley, Kenneth A., Eide, Sigurd, Flannery, David, Hughes, Cory, Jacob, Samantha R., Kah, Linda C., Meyen, Forrest, Molina, Antonio, Nataf, Cathy Quantin, Rice, Melissa, Russell, Patrick, Scheller, Eva, Seeger, Christina H., Abbey, William J., Adler, Jacob B., Amundsen, Hans, Anderson, Ryan B., Angel, Stanley M., Arana, Gorka, Atkins, James, Barrington, Megan, Berger, Tor, Borden, Rose, Boring, Beau, Brown, Adrian, Carrier, Brandi L., Conrad, Pamela, Dypvik, Henning, Fagents, Sarah A., Gallegos, Zachary E., Garczynski, Brad, Golder, Keenan, Gomez, Felipe, Goreva, Yulia, Gupta, Sanjeev, Hamran, Svein-Erik, Hicks, Taryn, Hinterman, Eric Daniel, Horgan, Briony N., Hurowitz, Joel, Johnson, Jeffrey R., Lasue, Jeremie, Kronyak, Rachel E., Liu, Yang, Madariaga, Juan Manuel, Mangold, Nicolas, McClean, John, Miklusicak, Noah, Nunes, Daniel, Rojas, Corrine, Runyon, Kirby, Schmitz, Nicole, Scudder, Noel, Shaver, Emily, SooHoo, Jason G., Spaulding, Russell, Stanish, Evan, Tamppari, Leslie K., Tice, Michael M., Turenne, Nathalie, Willis, Peter A., and Aileen Yingst, R. more...

Abstract

The Mars 2020 Perseverance rover landing site is located within Jezero crater, a ∼50 km diameter impact crater interpreted to be a Noachian-aged lake basin inside the western edge of the Isidis impact structure. Jezero hosts remnants of a fluvial delta, inlet and outlet valleys, and infill deposits containing diverse carbonate, mafic, and hydrated minerals. Prior to the launch of the Mars 2020 mission, members of the Science Team collaborated to produce a photogeologic map of the Perseverance landing site in Jezero crater. Mapping was performed at a 1:5000 digital map scale using a 25 cm/pixel High Resolution Imaging Science Experiment (HiRISE) orthoimage mosaic base map and a 1 m/pixel HiRISE stereo digital terrain model. Mapped bedrock and surficial units were distinguished by differences in relative brightness, tone, topography, surface texture, and apparent roughness. Mapped bedrock units are generally consistent with those identified in previously published mapping efforts, but this study’s map includes the distribution of surficial deposits and sub-units of the Jezero delta at a higher level of detail than previous studies. This study considers four possible unit correlations to explain the relative age relationships of major units within the map area. Unit correlations include previously published interpretations as well as those that consider more complex interfingering relationships and alternative relative age relationships. The photogeologic map presented here is the foundation for scientific hypothesis development and strategic planning for Perseverance’s exploration of Jezero crater. more...

Published
2021

26. Diagenesis of Vera Rubin Ridge, Gale Crater, Mars, From Mastcam Multispectral Images

Author

Horgan, Briony H. N., primary, Johnson, Jeffrey R., additional, Fraeman, Abigail A., additional, Rice, Melissa S., additional, Seeger, Christina, additional, Bell, James F., additional, Bennett, Kristen A., additional, Cloutis, Edward A., additional, Edgar, Lauren A., additional, Frydenvang, Jens, additional, Grotzinger, John P., additional, L'Haridon, Jonas, additional, Jacob, Samantha R., additional, Mangold, Nicolas, additional, Rampe, Elizabeth B., additional, Rivera‐Hernandez, Frances, additional, Sun, Vivian Z., additional, Thompson, Lucy M., additional, and Wellington, Danika, additional more...

Published
2020
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27. Diagenesis of Vera Rubin ridge, Gale crater, Mars from Mastcam multispectral images

Author

Horgan, Briony Heather Noelle, primary, Johnson, Jeffrey R., additional, Fraeman, Abigail A., additional, Rice, Melissa Susanne, additional, Seeger, Christina, additional, Bell III, James F, additional, Bennett, Kristen, additional, Cloutis, Edward, additional, Frydenvang, Jens, additional, L'Haridon, Jonas, additional, Mangold, Nicolas, additional, Edgar, Lauren Ashley, additional, Grotzinger, John P., additional, Jacob, Samantha, additional, Rampe, Elizabeth B., additional, Rivera-Hernández, Frances, additional, Sun, Vivian Zheng, additional, Thompson, Lucy M, additional, and Wellington, Danika, additional more...

Published
2020
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28. Diagenesis of Vera Rubin Ridge, Gale Crater, Mars, From Mastcam Multispectral Images

Author

Horgan, Briony H.N., Johnson, Jeffrey R., Fraeman, Abigail A., Rice, Melissa S., Seeger, Christina, Bell, James F., Bennett, Kristen A., Cloutis, Edward A., Edgar, Lauren A., Frydenvang, Jens, Grotzinger, John P., L'Haridon, Jonas, Jacob, Samantha R., Mangold, Nicolas, Rampe, Elizabeth B., Rivera-Hernandez, Frances, Sun, Vivian Z., Thompson, Lucy M., Wellington, Danika, Horgan, Briony H.N., Johnson, Jeffrey R., Fraeman, Abigail A., Rice, Melissa S., Seeger, Christina, Bell, James F., Bennett, Kristen A., Cloutis, Edward A., Edgar, Lauren A., Frydenvang, Jens, Grotzinger, John P., L'Haridon, Jonas, Jacob, Samantha R., Mangold, Nicolas, Rampe, Elizabeth B., Rivera-Hernandez, Frances, Sun, Vivian Z., Thompson, Lucy M., and Wellington, Danika more...

Abstract

Images from the Mars Science Laboratory (MSL) mission of lacustrine sedimentary rocks of Vera Rubin ridge on “Mt. Sharp” in Gale crater, Mars, have shown stark color variations from red to purple to gray. These color differences crosscut stratigraphy and are likely due to diagenetic alteration of the sediments after deposition. However, the chemistry and timing of these fluid interactions is unclear. Determining how diagenetic processes may have modified chemical and mineralogical signatures of ancient Martian environments is critical for understanding the past habitability of Mars and achieving the goals of the MSL mission. Here we use visible/near-infrared spectra from Mastcam and ChemCam to determine the mineralogical origins of color variations in the ridge. Color variations are consistent with changes in spectral properties related to the crystallinity, grain size, and texture of hematite. Coarse-grained gray hematite spectrally dominates in the gray patches and is present in the purple areas, while nanophase and fine-grained red crystalline hematite are present and spectrally dominate in the red and purple areas. We hypothesize that these differences were caused by grain-size coarsening of hematite by diagenetic fluids, as observed in terrestrial analogs. In this model, early primary reddening by oxidizing fluids near the surface was followed during or after burial by bleaching to form the gray patches, possibly with limited secondary reddening after exhumation. Diagenetic alteration may have diminished the preservation of biosignatures and changed the composition of the sediments, making it more difficult to interpret how conditions evolved in the paleolake over time. more...

Published
2020

29. Evidence of Early and Late Diagenesis of Sediments from Past Habitable Environments in Gale Crater, Mars: A Mastcam Multispectral Perpsective

Author

Rudolph, Amanda, primary, Haber, James, additional, Horgan, Briony, additional, Bennett, Kristen, additional, Fox, Valerie, additional, Seeger, Christina, additional, Rice, Melissa, additional, Johnson, Jeff, additional, Bell Iii, Jim, additional, Jacob, Samantha, additional, and Rampe, Elizabeth, additional more...

Published
2020
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30. Diagenesis of Vera Rubin ridge, Gale crater, Mars from Mastcam multispectral images

Author

Horgan, Briony Heather Noelle, primary, Johnson, Jeffrey R., additional, Fraeman, Abigail A., additional, Rice, Melissa Susanne, additional, Seeger, Christina, additional, Bell III, James F, additional, Bennett, Kristen, additional, Cloutis, Edward, additional, Frydenvang, Jens, additional, L'Haridon, Jonas, additional, Mangold, Nicolas, additional, Edgar, Lauren Ashley, additional, Grotzinger, John P., additional, Jacob, Samantha, additional, Rampe, Elizabeth B., additional, Rivera-Hernández, Frances, additional, Sun, Vivian Zheng, additional, Thompson, Lucy M, additional, and Wellington, Danika, additional more...

Published
2019
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31. TRIO OF STELLAR OCCULTATIONS BY PLUTO ONE YEAR PRIOR TO NEW HORIZONS' ARRIVAL

Author

Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences, Person, Michael J., Bosh, Amanda S., Sickafoose, Amanda A., Zuluaga, Carlos Andres, Kosiarek, Molly R., Pasachoff, Jay M., Levine, Stephen E., Osip, David J., Schiff, Avery, Seeger, Christina H., Babcock, Bryce A., Rojo, Patricio, Servajean, Elise, Gulbis, Amanda A. S., Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences, Person, Michael J., Bosh, Amanda S., Sickafoose, Amanda A., Zuluaga, Carlos Andres, Kosiarek, Molly R., Pasachoff, Jay M., Levine, Stephen E., Osip, David J., Schiff, Avery, Seeger, Christina H., Babcock, Bryce A., Rojo, Patricio, Servajean, Elise, and Gulbis, Amanda A. S. more...

Abstract

We observed occultations by Pluto during a predicted series of events in 2014 July with the 1 m telescope of the Mt. John Observatory in New Zealand. The predictions were based on updated astrometry obtained in the previous months at the USNO, CTIO, and Lowell Observatories. We successfully detected occultations by Pluto of an R = 18 mag star on July 23 (14:23:32 ± 00:00:04 UTC to 14:25:30 ± 00:00:04 UTC), with a drop of 75% of the unocculted stellar signal, and of an R = 17 star on July 24 (11:41:30 ± 00:00:08 UTC to 11:43:28 ± 00:00:08 UTC), with a drop of 80% of the unocculted stellar signal, both with 20 s exposures with our frame-transfer Portable Occultation, Eclipse, and Transit System. Since Pluto had a geocentric velocity of 22.51 km s[superscript −1] on July 23 and 22.35 km s[superscript −1] on July 24, these intervals yield limits on the chord lengths (surface and lower atmosphere) of 2700 ± 130 km and 2640 ± 250 km, respectively, indicating that the events were near central, and therefore provide astrometric constraints on the prediction method. Our coordinated observations with the 4 m AAT in Australia on July 23 and the 6.5 m Magellan/Clay on Las Campanas, the 4.1 m Southern Astrophysical Research Telescope on Cerro Pachön, the 2.5 m DuPont on Las Campanas (LCO), the 0.6 m SARA-South on Cerro Tololo of the Southeastern Association for Research in Astronomy (SARA), the MPI/ESO 2.2 m on La Silla, and the 0.45 m Cerro Calán telescope and 0.36 telescope in Constitución in Chile on July 27 and 31, which would have provided higher-cadence observations for studies of Pluto's atmosphere, were largely foiled by clouds, but led to detection with the LCO Magellan/Clay and DuPont Telescopes on July 31 of the grazing occultation of a previously unknown 15th-magnitude star, completing the trio of occultations successfully observed and reported in this paper., National Research Foundation (South Africa) more...

Published
2016

32. TRIO OF STELLAR OCCULTATIONS BY PLUTO ONE YEAR PRIOR TONEW HORIZONS’ ARRIVAL

Author

Pasachoff, Jay M., primary, Person, Michael J., additional, Bosh, Amanda S., additional, Sickafoose, Amanda A., additional, Zuluaga, Carlos, additional, Kosiarek, Molly R., additional, Levine, Stephen E., additional, Osip, David J., additional, Schiff, Avery, additional, Seeger, Christina H., additional, Babcock, Bryce A., additional, Rojo, Patricio, additional, and Servajean, Elise, additional more...

Published
2016
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35. Geological context and significance of the clay-sulfate transition region in Mount Sharp, Gale crater, Mars: An integrated assessment based on orbiter and rover data.

Author

Meyer, Melissa J., Milliken, Ralph E., Stack, Kathryn M., Edgar, Lauren A., Rampe, Elizabeth B., Turner, Madison L., Lewis, Kevin W., Kite, Edwin S., Caravaca, Gwénaël, Vasavada, Ashwin R., Dietrich, William E., Bryk, Alexander B., Gasnault, Olivier, Le Mouélic, Stéphane, Seeger, Christina H., and Sheppard, Rachel Y. more...

Subjects
*MARTIAN surface, *GALE Crater (Mars), *SULFATE minerals, *MARS rovers, *CLAY minerals
Abstract

On Mars, phyllosilicate ("clay") minerals are often associated with older terrains, and sulfate minerals are associated with younger terrains, and this dichotomy is taken as evidence that Mars' surface dried up over time. Therefore, in situ investigation of the Mount Sharp strata in Gale crater, which record a shift from dominantly clay-bearing to sulfate-bearing minerals, as seen in visible-near-infrared orbital reflectance spectra, is a key science objective for the Mars Science Laboratory (MSL) Curiosity rover mission. Here, we present regional (orbiter-based) and in situ (rover-based) evidence for a lowangle erosional unconformity that separates the lacustrine and marginal lacustrine deposits of the Carolyn Shoemaker formation from the dominantly eolian deposits of the lower Mirador formation within the orbitally defined clay-sulfate transition region. The upsection record of wetter (Carolyn Shoemaker formation) to drier (lower Mirador formation) depositional conditions is accompanied by distinct changes in diagenesis. Clay minerals occur preferentially within the Carolyn Shoemaker formation and are absent within the lower members of the Mirador formation. At and above the proposed unconformity, strata are characterized by an increase in diagenetic nodules enriched in X-ray amorphous Mg-sulfate. Early clay formation in the Carolyn Shoemaker formation may have created a hydraulic barrier such that later migrating magnesium- and sulfur-rich fluids accumulated preferentially within the lower members of the Mirador formation. The proposed unconformity may have also acted as a fluid conduit to further promote Mg-sulfate nodule formation at the Carolyn Shoemaker-Mirador formation boundary. These results confirm an association of the clay-sulfate transition with the drying of depositional environments, but they also suggest that at least some orbital sulfate signatures within the region are not time-congruent with the environmental signals extracted from primary sedimentology. Our findings highlight that complex interactions among primary depositional environment, erosion, and diagenesis contribute to the transition in clay-sulfate orbital signatures observed in the stratigraphy of Mount Sharp. [ABSTRACT FROM AUTHOR] more...

Published
2025
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36. Manganese-Iron Phosphate Nodules at the Groken Site, Gale Crater, Mars

Author

Treiman, Allan H., Lanza, Nina L., VanBommel, Scott, Berger, Jeff, Wiens, Roger, Bristow, Thomas, Johnson, Jeffrey, Rice, Melissa, Hart, Reginald, McAdam, Amy, Gasda, Patrick, Meslin, Pierre-Yves, Yen, Albert, Williams, Amy J., Vasavada, Ashwin, Vaniman, David, Tu, Valerie, Thorpe, Michael, Swanner, Elizabeth D., Seeger, Christina, Schwenzer, Susanne P., Schröder, Susanne, Rampe, Elizabeth, Rapin, William, Ralston, Silas J., Peretyazhko, Tanya, Newsom, Horton, Morris, Richard V., Ming, Douglas, Loche, Matteo, Le Mouélic, Stéphane, House, Christopher, Hazen, Robert, Grotzinger, John P., Gellert, Ralf, Gasnault, Olivier, Fischer, Woodward W., Essunfeld, Ari, Downs, Robert T., Downs, Gordon W., Dehouck, Erwin, Crossey, Laura J., Cousin, Agnes, Comellas, Jade M., Clark, Joanna V., Clark, Benton, Chipera, Steve, Caravaca, Gwenaël, Bridges, John, Blake, David F., Anderson, Ryan, Treiman, Allan H., Lanza, Nina L., VanBommel, Scott, Berger, Jeff, Wiens, Roger, Bristow, Thomas, Johnson, Jeffrey, Rice, Melissa, Hart, Reginald, McAdam, Amy, Gasda, Patrick, Meslin, Pierre-Yves, Yen, Albert, Williams, Amy J., Vasavada, Ashwin, Vaniman, David, Tu, Valerie, Thorpe, Michael, Swanner, Elizabeth D., Seeger, Christina, Schwenzer, Susanne P., Schröder, Susanne, Rampe, Elizabeth, Rapin, William, Ralston, Silas J., Peretyazhko, Tanya, Newsom, Horton, Morris, Richard V., Ming, Douglas, Loche, Matteo, Le Mouélic, Stéphane, House, Christopher, Hazen, Robert, Grotzinger, John P., Gellert, Ralf, Gasnault, Olivier, Fischer, Woodward W., Essunfeld, Ari, Downs, Robert T., Downs, Gordon W., Dehouck, Erwin, Crossey, Laura J., Cousin, Agnes, Comellas, Jade M., Clark, Joanna V., Clark, Benton, Chipera, Steve, Caravaca, Gwenaël, Bridges, John, Blake, David F., and Anderson, Ryan more...

Abstract

The MSL Curiosity rover investigated dark, Mn-P-enriched nodules in shallow lacustrine/fluvial sediments at the Groken site in Glen Torridon, Gale Crater, Mars. Applying all relevant information from the rover, the nodules are interpreted as pseudomorphs after original crystals of vivianite, (Fe2+,Mn2+)3(PO4)2·8H2O, that cemented the sediment soon after deposition. The nodules appear to have flat faces and linear boundaries and stand above the surrounding siltstone. ChemCam LIBS (laser-induced breakdown spectrometry) shows that the nodules have MnO abundances approximately twenty times those of the surrounding siltstone matrix, contain little CaO, and have SiO2 and Al2O3 abundances similar to those of the siltstone. A deconvolution of APXS analyses of nodule-bearing targets, interpreted here as representing the nodules’ non-silicate components, shows high concentrations of MnO, P2O5, and FeO and a molar ratio P/Mn = 2. Visible to near-infrared reflectance of the nodules (by ChemCam passive and Mastcam multispectral) is dark and relatively flat, consistent with a mixture of host siltstone, hematite, and a dark spectrally bland material (like pyrolusite, MnO2). A drill sample at the site is shown to contain minimal nodule material, implying that analyses by the CheMin and SAM instruments do not constrain the nodules’ mineralogy or composition. The fact that the nodules contain P and Mn in a small molar integer ratio, P/Mn = 2, suggests that the nodules contained a stoichiometric Mn-phosphate mineral, in which Fe did (i.e., could) not substitute for Mn. The most likely such minerals are laueite and strunzite, (Fe2+,Mn2+)3(PO4)2·8H2O and –6H2O, respectively, which occur on Earth as alteration products of other Mn-bearing phosphates including vivianite. Vivianite is more...

37. Geological, multispectral, and meteorological imaging results from the Mars 2020 Perseverance rover in Jezero crater.

Author

Bell JF 3rd, Maki JN, Alwmark S, Ehlmann BL, Fagents SA, Grotzinger JP, Gupta S, Hayes A, Herkenhoff KE, Horgan BHN, Johnson JR, Kinch KB, Lemmon MT, Madsen MB, Núñez JI, Paar G, Rice M, Rice JW Jr, Schmitz N, Sullivan R, Vaughan A, Wolff MJ, Bechtold A, Bosak T, Duflot LE, Fairén AG, Garczynski B, Jaumann R, Merusi M, Million C, Ravanis E, Shuster DL, Simon J, St Clair M, Tate C, Walter S, Weiss B, Bailey AM, Bertrand T, Beyssac O, Brown AJ, Caballo-Perucha P, Caplinger MA, Caudill CM, Cary F, Cisneros E, Cloutis EA, Cluff N, Corlies P, Crawford K, Curtis S, Deen R, Dixon D, Donaldson C, Barrington M, Ficht M, Fleron S, Hansen M, Harker D, Howson R, Huggett J, Jacob S, Jensen E, Jensen OB, Jodhpurkar M, Joseph J, Juarez C, Kah LC, Kanine O, Kristensen J, Kubacki T, Lapo K, Magee A, Maimone M, Mehall GL, Mehall L, Mollerup J, Viúdez-Moreiras D, Paris K, Powell KE, Preusker F, Proton J, Rojas C, Sallurday D, Saxton K, Scheller E, Seeger CH, Starr M, Stein N, Turenne N, Van Beek J, Winhold AG, and Yingling R more...

Abstract

Perseverance's Mastcam-Z instrument provides high-resolution stereo and multispectral images with a unique combination of spatial resolution, spatial coverage, and wavelength coverage along the rover's traverse in Jezero crater, Mars. Images reveal rocks consistent with an igneous (including volcanic and/or volcaniclastic) and/or impactite origin and limited aqueous alteration, including polygonally fractured rocks with weathered coatings; massive boulder-forming bedrock consisting of mafic silicates, ferric oxides, and/or iron-bearing alteration minerals; and coarsely layered outcrops dominated by olivine. Pyroxene dominates the iron-bearing mineralogy in the fine-grained regolith, while olivine dominates the coarse-grained regolith. Solar and atmospheric imaging observations show significant intra- and intersol variations in dust optical depth and water ice clouds, as well as unique examples of boundary layer vortex action from both natural (dust devil) and Ingenuity helicopter-induced dust lifting. High-resolution stereo imaging also provides geologic context for rover operations, other instrument observations, and sample selection, characterization, and confirmation. more...

Published
2022
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