气候变化领域集成服务门户(CCPortal): Carbonate thermoluminescence and its implication for marine productivity change during the Permian-Triassic transition

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DOI	10.1016/j.palaeo.2019.04.021
	Carbonate thermoluminescence and its implication for marine productivity change during the Permian-Triassic transition
	Qiu Z.; Song H.; Hu C.; Wignall P.B.; Song H.
发表日期	2019
ISSN	0031-0182
起始页码	72
结束页码	79
卷号	526
英文摘要	The Permian-Triassic (P-Tr)crisis was the largest mass extinction of the Phanerozoic and eliminated over 90% of marine species. However, the nature of marine productivity changes during the crisis is a matter of on-going debate. Here, thermoluminescence (TL)measurements from 144 bulk carbonate samples from Meishan (South China)show two levels of variation in TL peak intensities at ~270 °C. The first-order variation is characterized by a rapid, nearly three-fold increase. A secondary variation is interpreted to record periodic fluctuations on a Milankovitch scale (~20-kyr rhythm). The periodic variations of TL are negatively correlated with Mn concentrations, suggesting primary productivity is a key factor controlling the TL peak intensity by photo-reduction of particulate Mn in the presence of organic matter. Therefore, the periodic fluctuations of TL were likely controlled by primary productivity changes on orbital timescales. A significant rise of TL peak intensities across the P-Tr boundary represents the rapid increase of dissolved Mn associated with enhanced marine productivity and/or oceanic anoxia. © 2019 Elsevier B.V.
英文关键词	Carbon isotope; Dissolved Mn; Meishan section; Milankovitch cycle; Oceanic anoxia; Permian-Triassic extinction
语种	英语
scopus关键词	anoxic conditions; carbon isotope; carbonate; manganese; mass extinction; Milankovitch cycle; Permian-Triassic boundary; Phanerozoic; primary production; thermoluminescence; China; Meishan; Zhejiang
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/150954
作者单位	State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom
推荐引用方式 GB/T 7714	Qiu Z.,Song H.,Hu C.,et al. Carbonate thermoluminescence and its implication for marine productivity change during the Permian-Triassic transition[J],2019,526.
APA	Qiu Z.,Song H.,Hu C.,Wignall P.B.,&Song H..(2019).Carbonate thermoluminescence and its implication for marine productivity change during the Permian-Triassic transition.Palaeogeography, Palaeoclimatology, Palaeoecology,526.
MLA	Qiu Z.,et al."Carbonate thermoluminescence and its implication for marine productivity change during the Permian-Triassic transition".Palaeogeography, Palaeoclimatology, Palaeoecology 526(2019).