Results 81 to 90 of about 1,954 (223)

(Figure 2) Paleoproductivity and size of planktic foraminifers of sediment core PS2498-1

, 2003
(Figure 2) Paleoproductivity and size of planktic foraminifers of sediment core PS2498-
Schmidt, Daniela N, Sabrina Renaud (7887965), Daniela N Schmidt (6959528), Renaud, Sabrina, Bollmann, Jörg, Jörg Bollmann (7134611)   +5 more
core   +1 more source

Hydrocarbon generation potential and organic matter accumulation patterns in organic-rich shale during the mesoproterozoic oxygenation event: evidence from the Xiamaling formation shale

Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023
A significant deposition of black shales occurred during the Mesoproterozoic Oxygenation Event (MOE). In order to investigate the hydrocarbon generation potential and organic matter enrichment mechanism of these shale deposits, we studied the Xiamaling ...
Huan Miao, Zhenxue Jiang, Xianglu Tang, Ze Deng, Chengju Zhang, Zhikai Liang, Yuguang Shi   +6 more
doaj   +1 more source

Authigenic Uranium Preservation and Bottom Water Oxygenation in the Scotia Sea

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 9, September 2025.
Abstract Sedimentary uranium (U) and thorium (Th) isotopes are invaluable proxies to assess bottom water redox conditions, site‐specific sediment focusing and vertical rain rates. We investigate if authigenic uranium (aU) can serve as a proxy for bottom water ventilation at International Ocean Discovery Program Site U1537 in the Scotia Sea and we ...
Moritz Hallmaier, Marcus Gutjahr, Jörg Lippold, Sidney R. Hemming, Lukas Gerber, Michael E. Weber, Anton Eisenhauer   +6 more
wiley   +1 more source

(Table 1) TOC, MAR, paleoproductivity, and carbon isotope ratios of kerogens from ODP Site 131-808

, 1993
(Table 1) TOC, MAR, paleoproductivity, and carbon isotope ratios of kerogens from ODP Site 131 ...
Berner, Ulrich, Ulrich Berner (6962381), J Koch (7979495), Koch, J   +3 more
core   +1 more source

sj-xlsx-1-hol-10.1177_09596836231183057 – Supplemental material for Diatom-based paleoproductivity and climate change record of the Gulf of Tehuantepec (Eastern Tropical Pacific) during the last ~500 years

, 2023
Supplemental material, sj-xlsx-1-hol-10.1177_09596836231183057 for Diatom-based paleoproductivity and climate change record of the Gulf of Tehuantepec (Eastern Tropical Pacific) during the last ~500 years by Laura Almaraz-Ruiz, María Luisa Machain ...
Ana Carolina Ruiz-Fernández (8714397), María Luisa Machain-Castillo (9913706), Mercedes Mendez-Millan (16478197), Sandrine Caquineau (16478200), Laura Almaraz-Ruiz (9913709), Perla Guadalupe López-Mendoza (16478194), Abdelfettah Sifeddine (6746888), Alejandro Rodríguez-Ramírez (16478191), Joan-Albert Sanchez-Cabeza (2406046)   +8 more
core   +1 more source

Cross‐Project Deep‐Sea Sediment Geochemistry From XRF Spectra: A Self‐Supervised Foundation Model (MAX)

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 3, September 2025.
Abstract The geochemistry of deep‐sea sediments is crucial for reconstructing past climate variations in detail. A range of models has been employed to enhance the resolution of geochemical measurements derived from rapid X‐ray fluorescence (XRF) scanning data.
An‐Sheng Lee, Yu‐Wen Pao, Hsuan‐Tien Lin, Sofia Ya Hsuan Liou   +3 more
wiley   +1 more source

Detrital input, productivity fluctuations, and water mass circulation in the westernmost Mediterranean Sea since the Last Glacial Maximum

Geochemistry, Geophysics, Geosystems, 2008
By presenting sea surface temperatures, planktonic oxygen isotope profiles, and bulk geochemical composition of core sediments, we offer a multiparameter reconstruction of Western Mediterranean oceanography from the Last Glacial Maximum until the Middle ...
F. J. Jimenez‐Espejo, F. Martinez‐Ruiz, M. Rogerson, J. M. González‐Donoso, O. E. Romero, D. Linares, T. Sakamoto, D. Gallego‐Torres, J. L. Rueda Ruiz, M. Ortega‐Huertas, J. A. Perez Claros   +10 more
doaj   +1 more source

Influence of Indian Summer Monsoon on Marine Biological Productivity Across the Late Pliocene and Early Pleistocene

Paleoceanography and Paleoclimatology, Volume 40, Issue 7, July 2025.
Abstract The Indian Summer Monsoon (ISM) significantly impacts the lives of billions of people through rainfall patterns and ocean biological productivity. However, its stability both in the near future and distant past is disputed, particularly its response to changing temperatures and global ice volume.
Yasmin Bokhari‐Friberg, Pallavi Anand, Oscar Romero, Kate Littler, Marci Robinson, Philip Sexton, Melanie Leng, Masafumi Murayama   +7 more
wiley   +1 more source

Bioactive trace metals and their isotopes as paleoproductivity proxies: An assessment using GEOTRACES-era data

, 2021
International audiencePhytoplankton productivity and export sequester climatically significant quantities of atmospheric carbon dioxide as particulate organic carbon through a suite of processes termed the biological pump.
Little, Susan, Hertzberg, Jennifer, Farmer, Jesse, Wuttig, Kathrin, Lough, Alastair, Sutton, Jill, Rafter, Patrick, Lacan, Francois, Paytan, Adina, Bolton, Clara, Somes, Christopher, de Garidel-Thoron, Thibault, Jaccard, Sam, Hendry, Katharine, Calvo, Eva, Horner, Tristan, Tessin, Allyson, Fietz, Susanne, Winckler, Gisela, Conway, Tim, Cardinal, Damien, Janssen, D. J., Mckay, Jennifer, Marcantonio, Franco, Galer, Stephen, Ren, Haojia, Torfstein, Adi   +26 more
core   +2 more sources

A Nutrient Effect on the TEX86 Paleotemperature Proxy

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract The TEX86 ${\text{TEX}}_{86}$ paleotemperature proxy is widely used to reconstruct ocean surface temperatures over the past 100 million years. However, archaeal culture experiments show that nutrient stress elevates TEX86 ${\text{TEX}}_{86}$ values by increasing glycerol dialkyl glycerol tetraether (GDGT) cyclization. Here, we demonstrate that
Ronnakrit Rattanasriampaipong, Jessica E. Tierney, Jordan T. Abell, Lauren D. Gilmore   +3 more
wiley   +1 more source