Search

Your search keyword '"Pedersen, David A.K."' showing total 7 results
Start Over Author "Pedersen, David A.K."
7 results on '"Pedersen, David A.K."'

1. The power of paired proximity science observations: Co-located data from SHERLOC and PIXL on Mars

Author

Razzell Hollis, Joseph, Moore, Kelsey R., Sharma, Sunanda, Beegle, Luther, Grotzinger, John P., Allwood, Abigail, Abbey, William, Bhartia, Rohit, Brown, Adrian J., Clark, Benton, Cloutis, Edward, Corpolongo, Andrea, Henneke, Jesper, Hickman-Lewis, Keyron, Hurowitz, Joel A., Jones, Michael W.M., Liu, Yang, Martinez-Frías, Jesús, Murphy, Ashley, Pedersen, David A.K., Shkolyar, Svetlana, Siljeström, Sandra, Steele, Andrew, Tice, Mike, Treiman, Alan, Uckert, Kyle, VanBommel, Scott, and Yanchilina, Anastasia

Published
2022
Full Text
View/download PDF

2. Inorganic interpretation of luminescent materials encountered by the Perseverance rover on Mars

Author

Scheller, Eva L., Bosak, Tanja, McCubbin, Francis M., Williford, Kenneth, Siljeström, Sandra, Jakubek, Ryan S., Eckley, Scott A., Morris, Richard V., Bykov, Sergei V., Kizovski, Tanya, Asher, Sanford, Berger, Eve, Bower, Dina M., Cardarelli, Emily L., Ehlmann, Bethany L., Fornaro, Teresa, Fox, Allison, Haney, Nikole, Hand, Kevin, Roppel, Ryan, Sharma, Sunanda, Steele, Andrew, Uckert, Kyle, Yanchilina, Anastasia G., Beyssac, Olivier, Farley, Kenneth A., Henneke, Jesper, Heirwegh, Chris, Pedersen, David A.K., Liu, Yang, Schmidt, Mariek E., Sephton, Mark, Shuster, David, Weiss, Benjamin P., Scheller, Eva L., Bosak, Tanja, McCubbin, Francis M., Williford, Kenneth, Siljeström, Sandra, Jakubek, Ryan S., Eckley, Scott A., Morris, Richard V., Bykov, Sergei V., Kizovski, Tanya, Asher, Sanford, Berger, Eve, Bower, Dina M., Cardarelli, Emily L., Ehlmann, Bethany L., Fornaro, Teresa, Fox, Allison, Haney, Nikole, Hand, Kevin, Roppel, Ryan, Sharma, Sunanda, Steele, Andrew, Uckert, Kyle, Yanchilina, Anastasia G., Beyssac, Olivier, Farley, Kenneth A., Henneke, Jesper, Heirwegh, Chris, Pedersen, David A.K., Liu, Yang, Schmidt, Mariek E., Sephton, Mark, Shuster, David, and Weiss, Benjamin P.

Abstract

A major objective of the Mars 2020 mission is to sample rocks in Jezero crater that may preserve organic matter for later return to Earth. Using an ultraviolet Raman and luminescence spectrometer, the Perseverance rover detected luminescence signals with maximal intensities at 330 to 350 nanometers and 270 to 290 nanometers that were initially reported as consistent with organics. Here, we test the alternative hypothesis that the 330-to 350-nanometer and 270-to 290-nanometer luminescence signals trace Ce3+ in phosphate and silicate defects, respectively. By comparing the distributions of luminescence signals with the rover detections of x-ray fluorescence from P2O5 and Si-bearing materials, we show that, while an organic origin is not excluded, the observed luminescence can be explained by purely inorganic materials. These findings highlight the importance of eventual laboratory analyses to detect and characterize organic compounds in the returned samples.

Published
2024

3. Alteration history of Séítah formation rocks inferred by PIXL x-ray fluorescence, x-ray diffraction, and multispectral imaging on Mars

Author

Tice, Michael M., Hurowitz, Joel A., Allwood, Abigail C., Jones, Michael W.M., Orenstein, Brendan J., Davidoff, Scott, Wright, Austin P., Pedersen, David A.K., Henneke, Jesper, Tosca, Nicholas J., Moore, Kelsey R., Clark, Benton C., McLennan, Scott M., Flannery, David T., Steele, Andrew, Brown, Adrian J., Zorzano, Maria Paz, Hickman-Lewis, Keyron, Liu, Yang, VanBommel, Scott J., Schmidt, Mariek E., Kizovski, Tanya V., Treiman, Allan H., O'Neil, Lauren, Fairén, Alberto G., Shuster, David L., Gupta, Sanjeev, Tice, Michael M., Hurowitz, Joel A., Allwood, Abigail C., Jones, Michael W.M., Orenstein, Brendan J., Davidoff, Scott, Wright, Austin P., Pedersen, David A.K., Henneke, Jesper, Tosca, Nicholas J., Moore, Kelsey R., Clark, Benton C., McLennan, Scott M., Flannery, David T., Steele, Andrew, Brown, Adrian J., Zorzano, Maria Paz, Hickman-Lewis, Keyron, Liu, Yang, VanBommel, Scott J., Schmidt, Mariek E., Kizovski, Tanya V., Treiman, Allan H., O'Neil, Lauren, Fairén, Alberto G., Shuster, David L., and Gupta, Sanjeev

Abstract

Collocated crystal sizes and mineral identities are critical for interpreting textural relationships in rocks and testing geological hypotheses, but it has been previously impossible to unambiguously constrain these properties using in situ instruments on Mars rovers. Here, we demonstrate that diffracted and fluoresced x-rays detected by the PIXL instrument (an x-ray fluorescence microscope on the Perseverance rover) provide information about the presence or absence of coherent crystalline domains in various minerals. X-ray analysis and multispectral imaging of rocks from the Séítah formation on the floor of Jezero crater shows that they were emplaced as coarsely crystalline igneous phases. Olivine grains were then partially dissolved and filled by finely crystalline or amorphous secondary silicate, carbonate, sulfate, and chloride/oxychlorine minerals. These results support the hypothesis that Séítah formation rocks represent olivine cumulates altered by fluids far from chemical equilibrium at low water-rock ratios.

Published
2022

4. The power of paired proximity science observations: Co-located data from SHERLOC and PIXL on Mars

Author

Hollis, Joseph Razzell, Moore, Kelsey R., Sharma, Sunanda, Beegle, Luther, Grotzinger, John P., Allwood, Abigail, Abbey, William, Bhartia, Rohit, Brown, Adrian J., Clark, Benton, Cloutis, Edward, Corpolongo, Andrea, Henneke, Jesper, Hickman-Lewis, Keyron, Hurowitz, Joel A., Jones, Michael W.M., Liu, Yang, Martinez-Frías, Jesús, Murphy, Ashley, Pedersen, David A.K., Shkolyar, Svetlana, Siljeström, Sandra, Steele, Andrew, Tice, Mike, Treiman, Alan, Uckert, Kyle, VanBommel, Scott, Yanchilina, Anastasia, Hollis, Joseph Razzell, Moore, Kelsey R., Sharma, Sunanda, Beegle, Luther, Grotzinger, John P., Allwood, Abigail, Abbey, William, Bhartia, Rohit, Brown, Adrian J., Clark, Benton, Cloutis, Edward, Corpolongo, Andrea, Henneke, Jesper, Hickman-Lewis, Keyron, Hurowitz, Joel A., Jones, Michael W.M., Liu, Yang, Martinez-Frías, Jesús, Murphy, Ashley, Pedersen, David A.K., Shkolyar, Svetlana, Siljeström, Sandra, Steele, Andrew, Tice, Mike, Treiman, Alan, Uckert, Kyle, VanBommel, Scott, and Yanchilina, Anastasia

Abstract

We present a synthesis of PIXL elemental data and SHERLOC Raman spectra collected on two targets investigated by the Perseverance rover during the first year of its exploration of Jezero Crater, Mars. The Bellegarde target (in the Máaz formation) and Dourbes target (in the Séítah formation) exhibit distinctive mineralogies that are an ideal case study for in situ analysis by SHERLOC and PIXL. Each instrument alone produces valuable data about the chemistry and spatial distribution of mineral phases at the sub-millimeter scale. However, combining data from both instruments provides a more robust interpretation that overcomes the limitations of either instrument, for example: 1) Detection of correlated calcium and sulfur in Bellegarde by PIXL is corroborated by the co-located detection of calcium sulfate by SHERLOC. 2) Detection of sodium and chlorine in Dourbes is consistent with either chloride or oxychlorine salts, but SHERLOC does not detect perchlorate or chlorate. 3) A Raman peak at 1120 cm−1 in Dourbes could be sulfate or pyroxene, but elemental abundances from PIXL at that location are a better match to pyroxene. This study emphasizes the importance of analyzing co-located data from both instruments together, to obtain a more complete picture of sub-millimeter-scale mineralogy measured in situ in Jezero crater, Mars, by the Perseverance rover.

Published
2022

5. An overview of PIXL results obtained during the Perseverance rover’s exploration of crater floor lithologies at Jezero Crater, Mars

Author

Hurowitz, Joel, Allwood, Abigail, Tice, Michael M., Clark, Benton C., Flannery, David, Henneke, Jesper, Jones, Michael, Jørgensen, John L., Liu, Yang, Pedersen, David A.K., Orenstein, Brendan Jozef, Kamber, Balz, Schmidt, Mariek E., Hurowitz, Joel, Allwood, Abigail, Tice, Michael M., Clark, Benton C., Flannery, David, Henneke, Jesper, Jones, Michael, Jørgensen, John L., Liu, Yang, Pedersen, David A.K., Orenstein, Brendan Jozef, Kamber, Balz, and Schmidt, Mariek E.

Abstract

The Planetary Instrument for X-ray Lithochemistry (PIXL) is a micro-focus X-ray fluorescence spectrometer mounted on the robotic arm of NASA’s Perseverance rover (Allwood et al., 2021). As of the time of this writing, PIXL has acquired high spatial resolution observations of rock and regolith chemistry on the natural surfaces of two targets, named “Naltsos” and Beaujeu”. These targets represent rocks from the Jezero Floor map unit (Njf) of Sun and Stack (2020), and the scanned areas contained a mixture of variably weathered rock, dust, cemented dust-crust, and regolith, the latter collected in local topographic lows on the rock surfaces. On the target “Naltsos” a scan consisting of a single 30mm line with 0.25mm spacing between X-ray analysis points was collected on sol 125; details of the geochemical data associated with the scan of this target are discussed in Schmidt et al. (this meeting). On the target “Beaujeu”, three scans were collected: two identical scans consisting of 21mm by 21 mm grids with 1.5mm spacing between X-ray analysis points (sols 138 and 141), and a 3mm x 7mm map scan with contiguous X-ray analysis points (sol 139). The two grid scans were conducted before and after Beaujeau was scanned by the SuperCam LIBS instrument, with the intention of using the LIBS laser to clear the rock’s surface of loose dust. The PIXL instrument performed all these scans flawlessly, collecting the first high spatial resolution (120-micron beam size), fully quantitative, geochemical map ever collected on the surface of a rock on Mars, allowing texture, geochemistry, and derived mineralogy to be tied together at the sub-mm scale. Additional details of geochemical compositions (Liu et al., this meeting; Schmidt et al, this meeting), multispectral UV-VIS images derived from the PIXL camera and flood light illuminator subsystem (Henneke et al., this meeting), and optical fiducial subsystem performance (Pedersen et al., this meeting) are discussed elsewhere. We will focus

Published
2021

6. Correction to: PIXL: Planetary Instrument for X-Ray Lithochemistry (Space Science Reviews, (2020), 216, 8, (134), 10.1007/s11214-020-00767-7)

Author

Allwood, Abigail C., Wade, Lawrence A., Foote, Marc C., Elam, William Timothy, Hurowitz, Joel A., Battel, Steven, Dawson, Douglas E., Denise, Robert W., Ek, Eric M., Gilbert, Martin S., King, Matthew E., Liebe, Carl Christian, Parker, Todd, Pedersen, David A.K., Randall, David P., Sharrow, Robert F., Sondheim, Michael E., Allen, George, Arnett, Kenneth, Au, Mitchell H., Basset, Christophe, Benn, Mathias, Bousman, John C., Braun, David, Calvet, Robert J., Clark, Benton, Cinquini, Luca, Conaby, Sterling, Conley, Henry A., Davidoff, Scott, Delaney, Jenna, Denver, Troelz, Diaz, Ernesto, Doran, Gary B., Ervin, Joan, Evans, Michael, Flannery, David T., Gao, Ning, Gross, Johannes, Grotzinger, John, Hannah, Brett, Harris, Jackson T., Harris, Cathleen M., He, Yejun, Heirwegh, Christopher M., Hernandez, Christina, Hertzberg, Eric, Hodyss, Robert P., Holden, James R., Hummel, Christopher, Jadusingh, Matthew A., Jørgensen, John L., Kawamura, Jonathan H., Kitiyakara, Amarit, Kozaczek, Kris, Lambert, James L., Lawson, Peter R., Liu, Yang, Luchik, Thomas S., Macneal, Kristen M., Madsen, Soren N., McLennan, Scott M., McNally, Patrick, Meras, Patrick L., Muller, Richard E., Napoli, Jamie, Naylor, Bret J., Nemere, Peter, Ponomarev, Igor, Perez, Raul M., Pootrakul, Napat, Romero, Raul A., Rosas, Rogelio, Sachs, Jared, Schaefer, Rembrandt T., Schein, Michael E., Setterfield, Timothy P., Singh, Vritika, Song, Eugenie, Soria, Mary M., Stek, Paul C., Tallarida, Nicholas R., Thompson, David R., Tice, Michael M., Timmermann, Lars, Torossian, Violet, Treiman, Allan, Tsai, Shihchuan, Uckert, Kyle, Villalvazo, Juan, Wang, Mandy, Wilson, Daniel W., Worel, Shana C., Zamani, Payam, Zappe, Mike, Zhong, Fang, Zimmerman, Richard, Allwood, Abigail C., Wade, Lawrence A., Foote, Marc C., Elam, William Timothy, Hurowitz, Joel A., Battel, Steven, Dawson, Douglas E., Denise, Robert W., Ek, Eric M., Gilbert, Martin S., King, Matthew E., Liebe, Carl Christian, Parker, Todd, Pedersen, David A.K., Randall, David P., Sharrow, Robert F., Sondheim, Michael E., Allen, George, Arnett, Kenneth, Au, Mitchell H., Basset, Christophe, Benn, Mathias, Bousman, John C., Braun, David, Calvet, Robert J., Clark, Benton, Cinquini, Luca, Conaby, Sterling, Conley, Henry A., Davidoff, Scott, Delaney, Jenna, Denver, Troelz, Diaz, Ernesto, Doran, Gary B., Ervin, Joan, Evans, Michael, Flannery, David T., Gao, Ning, Gross, Johannes, Grotzinger, John, Hannah, Brett, Harris, Jackson T., Harris, Cathleen M., He, Yejun, Heirwegh, Christopher M., Hernandez, Christina, Hertzberg, Eric, Hodyss, Robert P., Holden, James R., Hummel, Christopher, Jadusingh, Matthew A., Jørgensen, John L., Kawamura, Jonathan H., Kitiyakara, Amarit, Kozaczek, Kris, Lambert, James L., Lawson, Peter R., Liu, Yang, Luchik, Thomas S., Macneal, Kristen M., Madsen, Soren N., McLennan, Scott M., McNally, Patrick, Meras, Patrick L., Muller, Richard E., Napoli, Jamie, Naylor, Bret J., Nemere, Peter, Ponomarev, Igor, Perez, Raul M., Pootrakul, Napat, Romero, Raul A., Rosas, Rogelio, Sachs, Jared, Schaefer, Rembrandt T., Schein, Michael E., Setterfield, Timothy P., Singh, Vritika, Song, Eugenie, Soria, Mary M., Stek, Paul C., Tallarida, Nicholas R., Thompson, David R., Tice, Michael M., Timmermann, Lars, Torossian, Violet, Treiman, Allan, Tsai, Shihchuan, Uckert, Kyle, Villalvazo, Juan, Wang, Mandy, Wilson, Daniel W., Worel, Shana C., Zamani, Payam, Zappe, Mike, Zhong, Fang, and Zimmerman, Richard

Abstract

In section: 3 X-Ray Source 3.1 X-Ray Source Overview The following text should not be present: “The X-ray source combines components from multiple organizations. The high-voltage power supply (HVPS), which includes the LVCM, HVMM, and connecting cables, was designed and built by Battel Engineering and the University of Michigan Space Physics Research Laboratory (SPRL). The X-ray tube was designed and built by Moxtek Inc., and the X-ray optic was designed and built by XOS Inc. XOS aligned and integrated the X-ray tube and optic, while SPRL integrated this tube/optic assembly into the XRSA.” Please also find the corrected: Appendix A: Parameters This is a complete list of parameters that are in place when a scan is initiated that are returned in data products. All of these can be changed by uplink (Table presented.).

Published
2021

Catalog

Books, media, physical & digital resources
See catalog results