Results 51 to 60 of about 8,093,557 (158)

Reconstructing Environmental and Microbial Ecosystem Changes Across the Permian–Triassic Mass Extinction at Lusitaniadalen, Svalbard

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract The Permian–Triassic environmental crisis triggered fundamental changes in marine ecosystems, culminating in the most severe biodiversity crisis of the Phanerozoic. Yet, the environmental and geochemical conditions governing the crisis and ecosystem recovery remain debated.
S. Z. Buchwald, A. B. Frank, D. Birgel, K. Senger, T. Mosociova, Y. Pei, B. Beaty, L. G. Tarhan, F. Galasso, M. A. Gómez Correa, S. E. Grasby, U. Struck, D. Yuan, R. Steinkrauss, J. Gliwa, N. Lahajnar, J. Peckmann, W. J. Foster   +17 more
wiley   +1 more source

Environmental Controls on the Cycling of Fe and Mn in Patagonian Fjord Systems

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 1, January 2026.
Abstract Fjord sediments are important reservoirs and conduits of potentially bioavailable iron (Fe) and manganese (Mn). Both elements are critical to life, serving as key reactants in metabolic pathways, and play an important role in the reactivity and burial of organic carbon.
L. Piret, J. R. Hawkings, L. Hopf, D. McCabe   +3 more
wiley   +1 more source

Toward Calibrating for Bottom Water Oxygenation Using Magnetofossils: New Insights From Southeast Atlantic and Northeast Pacific Surface Sediments

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract Accurate estimation of past ocean oxygen concentrations is vital for understanding the ocean's response to global climate change, but proxies for reconstructing bottom water oxygen (BWO) are limited. Magnetofossils, produced by magnetotactic bacteria, are sensitive to redox conditions in various environments.
Pengfei Xue, Liao Chang, Rong Huang, Babette A. A. Hoogakker, Liang Yi   +4 more
wiley   +1 more source

Paleoredox conditions and shale gas potential of the Niutitang Formation: Insights from pyrite morphology, in situ trace elements, and Fe–S isotopes

Raw data for all figures in the manuscript by Miao Shi, Qinyuan Cao, Jinchuan Zhang, Bingsong Yu, Ye Yuan, Haoyu Lu, and Xiwei Wang to be published by Geochimica et Cosmochimica Acta as "Paleoredox conditions and shale gas potential of the Niutitang ...
Shi, Miao
core   +1 more source

Mineralization at Different Structural Levels in the Crust

Acta Geologica Sinica - English Edition, Volume 99, Issue 4, Page 1042-1058, August 2025.
Abstract Metallogenic research on structural levels can reveal vertical patterns of mineralization and facilitate the deep exploration of economic minerals. However, research focusing on the correlation between structural levels and mineralization remains limited.
Saisai LI, Hongrui ZHANG, Zengqian HOU
wiley   +1 more source

Supplementary data for: Extending the utility of the Tl isotope paleoredox proxy to carbonates

Supplementary data for: Extending the utility of the Tl isotope paleoredox proxy to ...
Ostrander, Chadlin
core   +1 more source

Climate-Provenance Effect on the Organic Matter Enrichment of the Chang 9 Source Rocks in the Central Ordos Basin, China

Geofluids, 2021
The Upper Triassic Chang 9 organic-rich sediments have been considered as effective hydrocarbon source rocks for the Mesozoic petroleum system in the Ordos Basin.
Ling Ma, Zhihuan Zhang, Weiqiu Meng
doaj   +1 more source

Impacts on Sedimentary Microbial Communities Related to Temporal Changes in Trace Metal Concentrations

Geobiology, Volume 23, Issue 4, July/August 2025.
ABSTRACT Microbial processes in marine sediments drive changes in redox conditions, ultimately controlling the cycling of elements between the dissolved and solid phases. The microbial community driving these cycles depends on trace metals, but it can also be inhibited at elevated metal concentrations.
Christopher K. Jones, Jessica M. Labonté, Lauren A. Haygood, Marta E. Torres, Gerhard Bohrmann, Timothy W. Lyons, Natascha Riedinger   +6 more
wiley   +1 more source

Sedimentary environmental evolution in the western bohai sea since the middle pleistocene: integrating geochemical and paleontological records

Frontiers in Earth Science
Aiming to address under-utilized geochemical proxies in the Bohai Sea (BS) due to analytical complexity and diagenetic uncertainty, this study present a 300-kyr high-resolution geochemical and microfossils records from core DZQ01, and identified ...
Shuyu Wu, Shuyu Wu, Shuyu Wu, Shuyu Wu, Hongxian Chu, Hongxian Chu, Maoguo An, Yongcai Feng, Yongcai Feng, Jun Liu, Jun Liu   +10 more
doaj   +1 more source

The Global Biogeochemical Cycle of Chromium at the Earth's Surface

Global Biogeochemical Cycles, Volume 39, Issue 6, June 2025.
Abstract The biogeochemistry of Cr and its cycling in Earth's surface environments is reviewed. A synthesis and critical evaluation of the major processes controlling Cr mobility and isotope composition (δ53Cr) is presented, taking a source to sink view beginning with Cr mobilization from Earth's crust.
David J. Janssen, Kohen W. Bauer, Sylvie Bruggmann, Sean A. Crowe   +3 more
wiley   +1 more source