气候变化领域集成服务门户(CCPortal): Intensified chemical weathering during the Permian-Triassic transition recorded in terrestrial and marine successions

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DOI	10.1016/j.palaeo.2018.06.012
	Intensified chemical weathering during the Permian-Triassic transition recorded in terrestrial and marine successions
	Cao Y.; Song H.; Algeo T.J.; Chu D.; Du Y.; Tian L.; Wang Y.; Tong J.
发表日期	2019
ISSN	0031-0182
起始页码	166
结束页码	177
卷号	519
英文摘要	Global warming is inferred to have been one of the main causes of the Permian-Triassic (P-Tr) boundary mass extinction. Although a strong temperature rise in tropical sea-surface temperatures during the latest Permian has been documented, coeval climate changes in terrestrial sections are less well-known. Here, we analyzed multiple weathering indexes (including CIA, CIW, and PIA) for two terrestrial sections in North China (Shichuanhe and Yima), all of which show a major excursion toward higher values (greater weathering intensity) around the end-Permian plant extinction (EPPE). At Shichuanhe, the CIA (chemical index of alteration) increases from 70 to 75 over the interval of 11–36 m, which straddles the EPPE at 33 m, and then decreases from 75 to 71 in the overlying strata. At Yima, CIA increases from 63 to 79 over the interval of 57–68 m, extending up to the EPPE at 68 m, and then gradually decreases from 78 to 72 in the overlying strata. These results imply a strong warming event coupled with intense chemical weathering in soil environments leading up to the end-Permian plant extinction. The decline in CIA values following the EPPE may reflect loss of weathered soils through physical erosion rather than climatic cooling. Estimation of atmospheric temperatures from the CIA data indicate rapid rises at Shichuanhe (from ~11.6 °C to 16.5 °C) and Yima (from 9.3 °C to 18.4 °C) during the end-Permian crisis. The findings in this study are consistent with the hypothesis that a sharp temperature rise caused the extinction of terrestrial organisms during the end-Permian crisis. © 2018 Elsevier B.V.
英文关键词	Chemical index of alteration; CIA; Mass extinction; Shichuanhe; Weathering; Yima
语种	英语
scopus关键词	air temperature; chemical alteration; chemical weathering; climate change; global warming; marine environment; mass extinction; Permian-Triassic boundary; sea surface temperature; soil ecosystem; terrestrial environment; China
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151043
作者单位	State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, 430074, China; Department of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, United States
推荐引用方式 GB/T 7714	Cao Y.,Song H.,Algeo T.J.,et al. Intensified chemical weathering during the Permian-Triassic transition recorded in terrestrial and marine successions[J],2019,519.
APA	Cao Y..,Song H..,Algeo T.J..,Chu D..,Du Y..,...&Tong J..(2019).Intensified chemical weathering during the Permian-Triassic transition recorded in terrestrial and marine successions.Palaeogeography, Palaeoclimatology, Palaeoecology,519.
MLA	Cao Y.,et al."Intensified chemical weathering during the Permian-Triassic transition recorded in terrestrial and marine successions".Palaeogeography, Palaeoclimatology, Palaeoecology 519(2019).