9 results on '"van der Lubbe, Jeroen (H. ). J. L."'
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2. Analytical Artefacts Preclude Reliable Isotope Ratio Measurement of Internal Water in Coral Skeletons
- Author
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de Graaf, Stefan, Vonhof, Hubert B., Reijmer, John J. G., Feenstra, Eline, Mienis, Furu, Prud'Homme, Charlotte, Zinke, Jens, van der Lubbe, Jeroen H. J. L., Swart, Peter K., Haug, Gerald, 1 Max Planck Institute for Chemistry Hahn‐Meitner‐Weg 1, D‐55128 Mainz Germany, 2 Department of Earth Sciences, Faculty of Science Vrije Universiteit Amsterdam De Boelelaan 1085 1081HV Amsterdam The Netherlands, 3 Department of Geosciences University of Fribourg Chemin du Musée 6 CH‐1700 Fribourg Switzerland, 4 NIOZ Royal Netherlands Institute for Sea Research 1790AB Den Burg The Netherlands, 6 School of Geography and the Environment University of Leicester University Road Leicester LE1 7RH UK, and 8 RSMAS University of Miami 4600 Rickenbacker Causeway Miami FL 33149 USA
- Subjects
corals ,isotope ratio measurement ,fluid inclusion water ,biogenic minerals ,IRMS ,CRDS ,Geochemistry and Petrology ,ddc:551.9 ,Geology - Abstract
Internal water in cold-water and tropical coral skeletons was extracted and measured for its oxygen and hydrogen isotope ratios. Water was extracted by crushing pieces of coral hard tissue in a percussion device connected to either a cavity ring-down spectroscopy (CRDS) system or an isotope ratio mass spectrometry (IRMS) system. Despite most samples yielding sufficient water, each analytical system produces distinct isotope patterns. Experiments show that several characteristics specific to biominerals give rise to discrepancies and analytical artefacts that preclude the acquisition of reproducible isotope data. The main complication is that internal water in biogenic carbonates is distributed in an open interconnected micro-network that readily exchanges with external water and potentially facilitates interaction with hydration water in the finely dispersed organic matrix in the coral skeleton. Furthermore, only an isotopically fractionated part of the internal water is released from the coral skeletons upon crushing. Altogether, isotope ratio measurement of internal water in corals with bulk crushing techniques does not give primary fluid isotope ratios useful for (palaeo-)environmental or microbiological studies. As the resulting isotope patterns can show systematic behaviour per technique, isotope data may be erroneously interpreted to reflect the original calcifying fluid when using only a single technique to isotopically characterise internal fluids in coral skeletons., Geostandards and Geoanalytical Research, 46 (3), ISSN:1639-4488, ISSN:1751-908X
- Published
- 2022
3. Improved collection of rooftop micrometeorites through optimized extraction methods: The Budel collection
- Author
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Jonker, Guido, primary, van Elsas, Roel, additional, van der Lubbe, Jeroen H. J. L., additional, and van Westrenen, Wim, additional
- Published
- 2023
- Full Text
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4. ‘Semi‐dwarf’ woolly mammoths from the East Siberian Sea coast, continental Russia
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Kirillova, Irina V., primary, Borisova, Olga K., additional, Chernova, Olga F., additional, Van Kolfschoten, Thijs, additional, Van Der Lubbe, Jeroen H. J. L., additional, Panin, Andrey V., additional, Pečnerová, Patricia, additional, Van Der Plicht, Johannes, additional, Shidlovskiy, Fedor K., additional, Titov, Vadim V., additional, and Zanina, Oksana G., additional
- Published
- 2020
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5. Carbon isotope trends in north-west European mosasaurs (Squamata; Late Cretaceous).
- Author
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GILTAIJ, TOM J., VAN DER LUBBE, JEROEN H. J. L., LINDOW, BENT E. K., SCHULP, ANNE S., and JAGT, JOHN W. M.
- Subjects
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CARBON isotopes , *SQUAMATA , *DENTAL enamel , *BODY size - Abstract
The carbon stable isotope composition (δ13C) of tooth enamel in mosasaurid squamates reflects aspects of their diet and diving behaviour. Here we present new δ13C data for such marine squamates from the Maastrichtian of Denmark and compare these with results obtained in previous studies from the lower-latitude type area of the Maastrichtian Stage (latest Cretaceous; 72.1-66.0 Ma) in the south-east Netherlands and north-east Belgium. For the Danish samples, there is a weak correlation between mosasaur body size and δ13C values, with larger-sized taxa having lower δ13C values, comparable to what has previously been observed for mosasaurs from the Maastrichtian type area. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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6. Fluid-flow evolution in the Albanide fold-thrust belt: Insights from hydrogen and oxygen isotope ratios of fluid inclusions.
- Author
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de Graaf, Stefan, Nooitgedacht, Casimir W., Le Goff, Johan, van der Lubbe, Jeroen H. J. L., Vonhof, Hubert B., and Reijmer, John J. G.
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FLUID inclusions ,THRUST belts (Geology) ,HYDROGEN isotopes ,CARBONATE rocks ,COMPLEX fluids ,PERMEABILITY ,SEAWATER ,OXYGEN isotopes - Abstract
Tectonic forces generated during thrust emplacement along active margins may drive complex fluid-flow patterns in fold-thrust belts and foreland basins. Isotope data (δ²H and δ
18 O) of fluid inclusions hosted in calcite vein cements are used to reconstruct regional fluid migration pathways in the Albanide fold-thrust system. The calcite veins used in this study developed in a sequence of naturally fractured Cretaceous-Eocene carbonate rocks as a result of episodic throughput of fluids from the early stages of burial onward. The acquired fluid inclusion isotope data demonstrate that fluids circulating in the carbonates were derived from an underlying reservoir that consisted of a mixture of meteoric water and evolved marine fluids, probably derived from deep-seated evaporites. The meteoric fluids infiltrated in the hinterland before being driven outward into the foreland basin and ascended as soon as fracturing induced a sufficient increase in permeability. Structural and petrographic observations provide time constraints for the various phases of fracture infilling and reveal an increasing dominance of meteoric water in the system through time as migration pathways shortened and marine formation fluids were progressively flushed out. Similar fluid-flow evolutions have previously been recorded in various fold-thrust belt settings elsewhere in the world. [ABSTRACT FROM AUTHOR]- Published
- 2019
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7. Sedimentation patterns off the Zambezi River over the last 20,000 years.
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van der Lubbe, Jeroen (H. ). J. L., Tjallingii, Rik, Prins, Maarten A., Brummer, Geert-Jan A., Jung, Simon J. A., Kroon, Dick, and Schneider, Ralph R.
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SEDIMENTATION & deposition , *MARINE sediments , *CONTINENTAL margins , *X-ray fluorescence , *MAGNETIC susceptibility - Abstract
Marine sediments from continental margins provide high-resolution archives of marine and continental climate, in particular near large river mouths. The Zambezi is one of the largest rivers in East Africa, discharging large amounts of fine-grained sediments onto the western margin of the Mozambique Channel. Accurate reconstructions of past variations in river discharge can be retrieved from the depositional history of riverine sediments. In this study, sedimentation patterns along the Mozambique Margin are inferred from a series of sediment cores spanning the last 20 kyr. These cores were retrieved off the Zambezi Mouth from the shelf and from various depths at the continental slope to provide detailed information on the depositional history of this region. High-resolution X-ray fluorescence and magnetic susceptibility core scanning measurements as well as grain-size distributions of the lithogenic sediment fraction, and organic matter and carbonate content analyses resolve centennial--millennial timescale variations in sediment transport and deposition along the Mozambique Margin. Largest changes in lithogenic sediment deposition coincide with the flooding of the Mozambique Shelf. Due to deglacial sea-level rise and changes in oceanic currents, fine-grained, mainly Zambezi sediments were no longer primarily deposited south of the Zambezi Mouth, but increasingly deposited onto the Mozambique Shelf, and transported northwards over the shelf before spilling over to the slope. In addition, flooding of the shelf initiated remobilization and down-slope transport of coarse-grained, winnowed sediments. The Heinrich Event 1 and Younger Dryas are clearly indicated as events of increased fine-grained sediment deposition along the Mozambique Margin, possibly linked to increased riverine runoff from the Zambezi Catchment, which is in harmony with a southward shift of the Intertropical Convergence Zone (ITCZ) and associated African rainfall belts, causing wetter conditions. This study illustrates that interpreting marine and continental climate proxy records in the vicinity of river deltas in terms of climate change requires proper consideration of sea-level and oceanic circulation induced effects on the transport and deposition patterns of fine-grained sediments at continental slopes. [ABSTRACT FROM AUTHOR]
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- 2014
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8. International Ocean Discovery Program; Expedition 361 preliminary report; South African climates (Agulhas LGM density profile); 30 January-31 March 2016
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Hall, Ian R., Hemming, Sidney R., LeVay, Leah J., Barker, Stephen R., Berke, Melissa A., Brentegani, Luna, Caley, Thibaut, Cartagena-Sierra, Alejandra, Charles, Christopher D., Coenen, Jason J., Crespin, Julien G., Franzese, Allison M., Gruetzner, Jens, Xibin, Han, Hins, Sophia K. V., Jimenez Espejo, Francisco J., Just, Janna, Koutsodendris, Andreas, Kubota, Kaoru, Lathika, Nambiyathodi, Norris, Richard D., Pereira dos Santos, Thiago, Robinson, Rebecca, Rolison, John M., Simon, Margit H., Tangunan, Deborah, van der Lubbe, Jeroen (H,) J. L., Yamane, Masako, and Hucai, Zhang
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Historical Geology and Paleoecology ,Africa ,Agulhas Current ,Algae ,Atlantic Meridional Overturning Circulation ,Atlantic Ocean ,Biostratigraphy ,Cenozoic ,Chemostratigraphy ,Climate effects ,Continental margin ,Cores ,Currents ,Expedition 361 ,Foraminifera ,IODP Site U1474 ,IODP Site U1475 ,IODP Site U1476 ,IODP Site U1477 ,IODP Site U1478 ,IODP Site U1479 ,Indian Ocean ,International Ocean Discovery Program ,Invertebrata ,Last glacial maximum ,Lithostratigraphy ,Magnetostratigraphy ,Marine sediments ,Microfossils ,Mozambique Channel ,Nannofossils ,Neogene ,Ocean circulation ,Ocean currents ,Paleo-oceanography ,Paleoclimatology ,Paleomagnetism ,Physical properties ,Plantae ,Pleistocene ,Pliocene ,Protista ,Quaternary ,Sediments ,South Atlantic ,Southeast Atlantic ,Southern Africa ,Tertiary ,SDG 14 - Life Below Water ,12 Stratigraphy, Historical Geology and Paleoecology ,12 Stratigraphy - Abstract
International Ocean Discovery Program (IODP) Expedition 361 drilled six sites on the southeast African margin and in the Indian-Atlantic ocean gateway, southwest Indian Ocean, from 30 January to 31 March 2016. In total, 5175 m of core was recovered, with an average recovery of 102%, during 29.7 days of on-site operations. The sites, situated in the Mozambique Channel at locations directly influenced by discharge from the Zambezi and Limpopo River catchments, the Natal Valley, the Agulhas Plateau, and Cape Basin, were targeted to reconstruct the history of the greater Agulhas Current system over the past ∼5 my. The Agulhas Current is the strongest western boundary current in the Southern Hemisphere, transporting some 70 Sv of warm, saline surface water from the tropical Indian Ocean along the East African margin to the tip of Africa. Exchanges of heat and moisture with the atmosphere influence southern African climates, including individual weather systems such as extratropical cyclone formation in the region and rainfall patterns. Recent ocean model and paleoceanographic data further point at a potential role of the Agulhas Current in controlling the strength and mode of the Atlantic Meridional Overturning Circulation (AMOC) during the Late Pleistocene. Spillage of saline Agulhas water into the South Atlantic stimulates buoyancy anomalies that act as control mechanisms on the basin-wide AMOC, with implications for convective activity in the North Atlantic and global climate change. The main objectives of the expedition were to establish the sensitivity of the Agulhas Current to climatic changes during the Pliocene-Pleistocene, to determine the dynamics of the Indian-Atlantic gateway circulation during this time, to examine the connection of the Agulhas leakage and AMOC, and to address the influence of the Agulhas Current on African terrestrial climates and coincidences with human evolution. Additionally, the expedition set out to fulfill the needs of the Ancillary Project Letter, consisting of high-resolution interstitial water samples that will constrain the temperature and salinity profiles of the ocean during the Last Glacial Maximum. The expedition made major strides toward fulfilling each of these objectives. The recovered sequences allowed generation of complete spliced stratigraphic sections that span from 0 to between ∼0.13 and 7 Ma. This sediment will provide decadal- to millennial-scale climatic records that will allow answering the paleoceanographic and paleoclimatic questions set out in the drilling proposal.
- Published
- 2016
9. Improved age control on early Homo fossils from the upper Burgi Member at Koobi Fora, Kenya.
- Author
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Joordens JC, Dupont-Nivet G, Feibel CS, Spoor F, Sier MJ, van der Lubbe JH, Nielsen TK, Knul MV, Davies GR, and Vonhof HB
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- Animals, Bone and Bones chemistry, Fossils, Kenya, Paleontology, Radiometric Dating, Strontium Isotopes chemistry, Biological Evolution, Hominidae physiology
- Abstract
To address questions regarding the evolutionary origin, radiation and dispersal of the genus Homo, it is crucial to be able to place the occurrence of hominin fossils in a high-resolution chronological framework. The period around 2 Ma (millions of years ago) in eastern Africa is of particular interest as it is at this time that a more substantial fossil record of the genus Homo is first found. Here we combine magnetostratigraphy and strontium (Sr) isotope stratigraphy to improve age control on hominin-bearing upper Burgi (UBU) deposits in Areas 105 and 131 on the Karari Ridge in the eastern Turkana Basin (Kenya). We identify the base of the Olduvai subchron (bC2n) plus a short isolated interval of consistently normal polarity that we interpret to be the Pre-Olduvai event. Combined with precession-forced (~20 kyr [thousands of years]) wet-dry climate cycles resolved by Sr isotope ratios, the magnetostratigraphic data allow us to construct an age model for the UBU deposits. We provide detailed age constraints for 15 hominin fossils from Area 131, showing that key specimens such as cranium KNM-ER 1470, partial face KNM-ER 62000 and mandibles KNM-ER 1482, KNM-ER 1801, and KNM-ER 1802 can be constrained between 1.945 ± 0.004 and 2.058 ± 0.034 Ma, and thus older than previously estimated. The new ages are consistent with a temporal overlap of two species of early Homo that can be distinguished by their facial morphology. Further, our results show that in this time interval, hominins occurred throughout the wet-dry climate cycles, supporting the hypothesis that the lacustrine Turkana Basin was a refugium during regionally dry periods. By establishing the observed first appearance datum of a marine-derived stingray in UBU deposits at 2.058 ± 0.034 Ma, we show that at this time the Turkana Basin was hydrographically connected to the Indian Ocean, facilitating dispersal of fauna between these areas. From a biogeographical perspective, we propose that the Indian Ocean coastal strip should be considered as a possible source area for one or more of the multiple Homo species in the Turkana Basin from over 2 Ma onwards., (Copyright © 2013 Elsevier Ltd. All rights reserved.)
- Published
- 2013
- Full Text
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