气候变化领域集成服务门户(CCPortal): Volcanism; redox conditions; and microbialite growth linked with the end-Permian mass extinction: Evidence from the Xiajiacao section (western Hubei Province); South China

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DOI	10.1016/j.palaeo.2017.07.020
	Volcanism; redox conditions; and microbialite growth linked with the end-Permian mass extinction: Evidence from the Xiajiacao section (western Hubei Province); South China
	Pei Y.; Chen Z.-Q.; Fang Y.; Kershaw S.; Wu S.; Luo M.
发表日期	2019
ISSN	0031-0182
起始页码	194
结束页码	208
卷号	519
英文摘要	A new Permian–Triassic boundary microbialite (PTBM) is described from the Xiajiacao section of western Hubei Province, South China. The new microbialite, 3.16 m thick, comprises a thin layer of stromatolite and a thick thrombolite unit. An irregular contact separates the uppermost Permian skeletal packstone from the post-extinction stromatolite, but it is not yet possible to discriminate whether it was formed by submarine solution in the wake of ocean acidification or subaerial exposure due to regional regression, or a combination of both. The stromatolite shows “cabbage-like” morphology, and the thrombolite is characterized by centimetric clotted texture. Abundant columns of the microproblematica structure Gakhumella, coccoid-like spheroids, bacterial clump-like spheroids, and hollow spheroids are recognized in both stromatolites and thrombolites and may have played an important role in accretion of the microbialites. Pyrite framboid analysis indicates that microbialites may have been affected by lower dysoxic to upper dysoxic conditions in the immediate aftermath of the Permian–Triassic extinction. Stratigraphic abundance of both high-temperature grains (β-quartz and glassy balls) peaked ~ 20 cm below the biotic extinction horizon, implying that either intensive volcanic eruption occurred only just prior to biotic extinction, or volcanism was still intensive during biotic extinction, but volcanic grains were not deposited in the Xiajiacao locality, likely due to the shallow, agitated environment caused by the regional regression. Overall, microbial bloom, indicated by the widespread PTBMs, seems to have been little affected by the contemporaneous volcanism. © 2017 Elsevier B.V.
英文关键词	Felsic volcanism; Framboidal pyrite; Microbial bloom; Permian–Triassic boundary; Stromatolite; Thrombolite
语种	英语
scopus关键词	accretion; growth; mass extinction; microbialite; ocean acidification; Permian; Permian-Triassic boundary; pyrite; redox conditions; stromatolite; thrombolite; volcanic eruption; volcanism; China; Hubei; Bacteria (microorganisms); Brassica oleracea var. capitata; Coccoidea
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/151055
作者单位	State Key Laboratory of Biogeology and Environmental Geology and School of Earth Science, China University of Geosciences, Wuhan, 430074, China; Department of Life Sciences, Brunel University, Uxbridge, UB8 3PH, United Kingdom; School of Life and Environmental Sciences, Deakin University, Melbourne Burwood CampusVictoria 3125, Australia
推荐引用方式 GB/T 7714	Pei Y.,Chen Z.-Q.,Fang Y.,et al. Volcanism; redox conditions; and microbialite growth linked with the end-Permian mass extinction: Evidence from the Xiajiacao section (western Hubei Province); South China[J],2019,519.
APA	Pei Y.,Chen Z.-Q.,Fang Y.,Kershaw S.,Wu S.,&Luo M..(2019).Volcanism; redox conditions; and microbialite growth linked with the end-Permian mass extinction: Evidence from the Xiajiacao section (western Hubei Province); South China.Palaeogeography, Palaeoclimatology, Palaeoecology,519.
MLA	Pei Y.,et al."Volcanism; redox conditions; and microbialite growth linked with the end-Permian mass extinction: Evidence from the Xiajiacao section (western Hubei Province); South China".Palaeogeography, Palaeoclimatology, Palaeoecology 519(2019).