Results 61 to 70 of about 1,954 (223)

Origin and paleoenvironment of organic matter in the Wufeng–Longmaxi shales in the northeastern Sichuan basin

Energy Exploration & Exploitation, 2021
The formation environment and preservation conditions of sedimentary organic matter (OM) play an important role in the accumulation of shale gas. In the present study, inorganic and organic geochemical data were analyzed to determine the origin and ...
Chaoyong Wang, Zaitian Dong, Xuehai Fu, Xin Hu, Zhen Li   +4 more
doaj   +1 more source

Sedimentary Environment Interpretation and Organic Matter Enrichment of the Lower Cambrian Shuijingtuo Shale in the Yichang Slope, South China: Insight from Sedimentary Geochemical Proxies with Major/Trace Elements

Journal of Marine Science and Engineering, 2023
The vertical geochemical variations in total organic carbon (TOC) content and major and trace elements of the Lower Cambrian Shuijingtuo Formation from the Yichang Slope in the Upper Yangtze were investigated to assess the environmental conditions (redox
Sile Wei, Mingyi Hu, Sheng He, Wei Yang, Qing He, Quansheng Cai, Ping Li   +6 more
doaj   +1 more source

Iron–Phosphorus–Carbon Coupled Cycling in Lacustrine System of Ordos Basin During the Middle Triassic

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract Widespread organic‐rich shales are associated with perturbations in productivity or preservation conditions; however, the major controlling factors, especially the phosphorus (P) and iron (Fe) interactions and their impacts on organic carbon burial in the paleolake ecosystem remain poorly understood.
Bo Wang, Rukai Zhu, Pengcheng Ju, Quanyou Liu, Weiming Xu, Peng Li, Wang Zhang, Xinping Liang   +7 more
wiley   +1 more source

Geochemistry, sediment components, and paleoproductivity reconstruction for the Miocene to early Pliocene of ODP Hole 162-982B

, 2005
Geochemistry, sediment components, and paleoproductivity reconstruction for the Miocene to early Pliocene of ODP Hole 162 ...
Katharina Billups (6963731), Lieselotte Diester-Haass (7886339), Diester-Haass, Lieselotte, Emeis, Kay-Christian, Kay-Christian Emeis (6958973), Billups, Katharina   +5 more
core   +1 more source

Geochemical Characteristics and Environmental Implications of Trace Elements of the Paleocene in the West Lishui Sag, East China Sea Basin

Energies, 2022
Analysis of the sedimentary environment during the clastic formation process is of great significance for reservoir evaluation and desert prediction. This paper focused on the Paleocene in the West Lishui Sag, East China Sea Basin.
Shuai Yang, Qiang Fu, Jinshui Liu, Wenrui Ma, Bing Yang, Zhiwei Zhu, Wen Teng   +6 more
doaj   +1 more source

Pliocene–Pleistocene Redox Evolution of the Peruvian Margin: A Multi‐Proxy Approach

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Due to upwelling of nutrient‐rich waters, the Peruvian Margin is one of the most productive regions of the global ocean, hosting one of the most pronounced and shallowest oxygen minimum zones. This combination of high productivity and low oxygen makes the Peruvian margin a critical site for reconstructing past environmental changes.
P. L. Fraga‐Ferreira, C. Siebert, M. F. Lehmann, M. Frank, F. Scholz   +4 more
wiley   +1 more source

Geochemistry, sediment components, and paleoproductivity reconstruction for the Miocene to early Pliocene sediments

, 2005
We reconstruct paleoproductivity at three sites in the Atlantic Ocean (Ocean Drilling Program Sites 982, 925, and 1088) to investigate the presence and extent of the late Miocene to early Pliocene 'biogenic bloom' from 9 to 3 Ma.
Katharina Billups (6963731), Lieselotte Diester-Haass (7886339), Diester-Haass, Lieselotte, Emeis, Kay-Christian, Kay-Christian Emeis (6958973), Billups, Katharina   +5 more
core   +1 more source

Late Pleistocene zinc isotopic indices of paleoproductivity variations in the tropical West Pacific

, 2023
The tropical western Pacific (TWP) plays a significant role in modulating the global climate, with solar radiation, sea surface temperature, and monsoon circulation.
Wang, Yipeng, Zhiyong Liu, Qi Han, Fan, Yujin, Han, Qi, Pei, Wenlong, Wenlong Pei, Rui Zhang, Xiaoxiao Yu, Liu, Zhiyong, Russell, James, James Russell, Wang, Xinling, Liang Du, Yipeng Wang, Jiayue Wang, Fan Zhang, Wang, Jiayue, Yu, Xiaoxiao, Zhang, Fan, Xinling Wang, Yujin Fan, Li, Tiegang, Minglei Guan, Zhang, Rui, Tiegang Li, Du, Liang, Guan, Minglei   +27 more
core   +1 more source

Elemental Geochemistry, Paleoproductivity Variations and Their Controlling Factors of Lower Cambrian Organic-Rich Strata in the Tarim Basin

Geosciences
Marine source rocks in the Tarim Basin are generally highly mature to overmature, and conventional organic geochemical parameters may not fully reflect their original organic matter accumulation under such conditions.
Mingxiao Sun, Talgat Yensepbayev, Ainura Zhanserkeyeva, Assylkhan Abylay   +3 more
doaj   +1 more source

Stepwise Glacial Inception and Prolonged Southern Ocean CO2 Outgassing Linked With Marine Isotope Stage 11

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract The climatic optimum of Marine Isotope Stage (MIS) 11, MIS 11c, was a remarkably long warmer‐than‐present climate interval with prolonged elevated atmospheric CO2 levels. While the Pacific Southern Ocean has a strong leverage on atmospheric CO2 through oceanic CO2 release, past changes in carbon cycle dynamics in this region and their ...
L. Jebasinski, G. Winckler, F. Lamy, L. von Stebut, D. A. Frick, C. Basak, A. K. I. U. Kapuge, J. R. Farmer, J. Gottschalk   +8 more
wiley   +1 more source