Linking carbon cycle perturbations to the Late Ordovician glaciation and mass extinction: A modeling approach

Earth and Planetary Science Letters, Год журнала: 2024, Номер 631, С. 118635 - 118635

Опубликована: Март 2, 2024

Язык: Английский

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The Middle–Late Pennsylvanian event: Timing and mechanisms

Palaeogeography Palaeoclimatology Palaeoecology, Год журнала: 2025, Номер unknown, С. 112893 - 112893

Опубликована: Март 1, 2025

Язык: Английский

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Multigenetic origins of pyrite in sedimentary systems: A NanoSIMS sulfur isotope study of the Silurian Longmaxi Formation

Marine and Petroleum Geology, Год журнала: 2025, Номер unknown, С. 107423 - 107423

Опубликована: Апрель 1, 2025

Язык: Английский

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Roller-coaster atmospheric-terrestrial-oceanic-climatic system during Ordovician-Silurian transition: Consequences of large igneous provinces

Geoscience Frontiers, Год журнала: 2023, Номер 14(3), С. 101537 - 101537

Опубликована: Янв. 18, 2023

The Ordovician-Silurian transition (OST) hosted profound and frequent changes in the atmospheric-terrestrial-oceanic-climatic system (ATOCS). Previous studies have found contrasting stages for such changes, primarily based on hiatus-interrupted sections. However, dominant driving factors mechanisms reconciling remain controversial. Mercury isotopes, which undergo both mass-dependent mass-independent fractionation, can provide critical insights into deep-time ATOCSs, especially those impacted by large igneous provinces (LIPs) events. Here, we build a high-resolution multi-proxy record of Hg (concentrations isotopic compositions) combined with organic carbon isotopes (δ13Corg) whole-rock geochemical data (including trace elements phosphorus) from continuous cores Yangtze Platform, South China. Our data, reported ones, indicate occurrence LIP eruptions against localized volcanism, four successive, yet ATOCSs during OST. Moreover, identified coupling between two-pulse magmatism extreme each special pCO2, weathering rate, primary productivity, redox condition, climatic mode, biotic evolution. For stage I, first pulse triggered global warming, enhanced terrestrial weathering, oceanic acidification, eutrophication, anoxia, P recycling, thereby widespread deposition black shales. During II, Hirnantian glaciation oxygenation arose intense chemical shale I; slashed facilitated CO2 accumulation. In III, another de-glaciation, ATOCS was largely similar to that I. This led round positive δ13Corg excursion IV. Compared environmental pressure peculiar stage, their transitions might been more devastating triggering prolonged Late Ordovician Mass Extinction (LOME). limited recovery possible later portion I III. study strata OST provides an excellent framework better illuminating LIPs' essential role "roller-coaster" behavior thus crisis pivotal period

Язык: Английский

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Volcanism-driven marine eutrophication in the end-Ordovician: Evidence from radiolarians and trace elements of black shale in South China

Journal of Asian Earth Sciences, Год журнала: 2023, Номер 253, С. 105687 - 105687

Опубликована: Апрель 28, 2023

Язык: Английский

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Regional synthesis of the Ordovician geology and stratigraphy of China

Geological Society London Special Publications, Год журнала: 2022, Номер 533(1), С. 421 - 478

Опубликована: Дек. 14, 2022

Abstract China presently comprises several independent tectonic palaeoplates or terranes and parts of other blocks, which have been assembled over geological time. In the Ordovician, these blocks included South China, North Tarim, Qaidam, Junggar, Qiangtang-Qamdo, Lhasa partially Himalaya, Sibumasu Indochina, as well Altay-Xing'an Songpan-Garze fold belts, were discrete but near-adjacent. Twelve stratigraphic megaregions bounded by sutures major fault zones can be recognized. Some them are further differentiated into regions according to lithological biotic facies distinct sequences. Here, palaeontologic features biostratigraphic framework summarized. The unified presented herein is supported 33 graptolite biozones 27 conodont biozones, together with supplementary communities associations brachiopods, trilobites, cephalopods, chitinozoans, acritarchs radiolarians. With constraints integrative chronostratigraphy, biostratigraphy, chemostratigraphy, cyclostratigraphy magnetostratigraphy, along some geochronologic data, our understanding temporal spatial distribution Ordovician lithostratigraphic units on has significantly advanced. Vast amounts new data accumulated in recent decades also constrain events evident such marine anoxia, faunal turnovers orogenies.

Язык: Английский

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Coupling of nitrogen biogeochemical cycling and phytoplankton community structure before and after the Late Ordovician mass extinction in South China

Chemical Geology, Год журнала: 2024, Номер 647, С. 121933 - 121933

Опубликована: Янв. 7, 2024

Язык: Английский

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Geochemistry of glacial, proglacial, and deglaciated environments

Elsevier eBooks, Год журнала: 2024, Номер unknown, С. 251 - 299

Опубликована: Авг. 29, 2024

Язык: Английский

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Links between deep Earth processes and hyperthermal and extreme cooling events

Chinese Science Bulletin (Chinese Version), Год журнала: 2023, Номер 69(2), С. 215 - 229

Опубликована: Июнь 1, 2023

Язык: Английский

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Geochemistry of environmental stress during mass extinctions

Elsevier eBooks, Год журнала: 2024, Номер unknown, С. 365 - 379

Опубликована: Фев. 24, 2024

Язык: Английский

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