TY - JOUR
T1 - Biotic responses to volatile volcanism and environmental stresses over the Guadalupian-Lopingian (Permian) transition
AU - Huang, Yuangeng
AU - Chen, Zhong Qiang
AU - Wignall, Paul B.
AU - Grasby, Stephen E.
AU - Zhao, Laishi
AU - Wang, Xiangdong
AU - Kaiho, Kunio
N1 - Funding Information:
We thank Pedro Marenco, Matthew Clapham, and other anonymous reviewers for critical comments. This study was supported by National Natural Science Foundation of China grants (41572091, 41772007, 41673011, 41661134047), a Hubei Provincial Natural Science Foundation grant (2017CFA019), and a China University of Geosciences grant (CUGCJ1815). It is a contribution to International Geosciences Programme (IGCP) 630: “Permian and Triassic Integrated Stratigraphy and Climatic, Environmental and Biotic Extremes.”
Publisher Copyright:
© 2019 Geological Society of America.
PY - 2019
Y1 - 2019
N2 - Biotic extinction during the Guadalupian-Lopingian (G-L) transition is actively debated, with its timing, validity, and causality all questioned. Here, we show, based on detailed sedimentary, paleoecologic, and geochemical analyses of the Penglaitan section in South China, that this intra-Permian biotic crisis began with the demise of a metazoan reef system and extinction of corals and alatoconchid bivalves in the late Guadalupian. A second crisis, among nektonic organisms, occurred around the G-L boundary. Mercury concentration/total organic carbon (Hg/TOC) ratios show two anomalies. The first Hg/TOC peak broadly coincides with the reef collapse and a positive shift in Δ 199 Hg values during a lowstand interval, which was followed by microbial proliferation. A larger Hg/TOC peak is found just above the G-L boundary and speculatively represents a main eruption episode of the Emeishan large igneous province (ELIP). This volatile volcanism coincided with nektonic extinction, a negative δ13C carb excursion, anoxia, and sea-level rise. The temporal coincidence of these phenomena supports a cause-andeffect relationship and indicates that the eruption of the ELIP likely triggered the G-L crisis.
AB - Biotic extinction during the Guadalupian-Lopingian (G-L) transition is actively debated, with its timing, validity, and causality all questioned. Here, we show, based on detailed sedimentary, paleoecologic, and geochemical analyses of the Penglaitan section in South China, that this intra-Permian biotic crisis began with the demise of a metazoan reef system and extinction of corals and alatoconchid bivalves in the late Guadalupian. A second crisis, among nektonic organisms, occurred around the G-L boundary. Mercury concentration/total organic carbon (Hg/TOC) ratios show two anomalies. The first Hg/TOC peak broadly coincides with the reef collapse and a positive shift in Δ 199 Hg values during a lowstand interval, which was followed by microbial proliferation. A larger Hg/TOC peak is found just above the G-L boundary and speculatively represents a main eruption episode of the Emeishan large igneous province (ELIP). This volatile volcanism coincided with nektonic extinction, a negative δ13C carb excursion, anoxia, and sea-level rise. The temporal coincidence of these phenomena supports a cause-andeffect relationship and indicates that the eruption of the ELIP likely triggered the G-L crisis.
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U2 - 10.1130/G45283.1
DO - 10.1130/G45283.1
M3 - Article
AN - SCOPUS:85059958239
VL - 47
SP - 175
EP - 178
JO - Geology
JF - Geology
SN - 0091-7613
IS - 2
ER -