TY - JOUR
T1 - Stratigraphy of the middle-upper permian and lowermost triassic at Chaotian, Sichuan, China
T2 - Record of Late Permian double mass extinction event
AU - Isozaki, Yukio
AU - Yao, Jianxin
AU - Matsuda, Tetsuo
AU - Sakai, Harutaka
AU - Ji, Zhansheng
AU - Shimizu, Noriei
AU - Kobayashi, Noritada
AU - Kawahata, Hodaka
AU - Nishi, Hiroshi
AU - Takano, Masao
AU - Kubo, Tomomi
PY - 2004/1
Y1 - 2004/1
N2 - Precise stratigraphic analysis of Middle-Upper Permian and Lower Triassic sequence at Chaotian in northern Sichuan, China, identified two remarkable mass extinction horizons, one at the Middle-Upper Permian (Guadalupian-Lopingian; G-L) boundary and the other at the Upper Permian-Lower Triassic (P-T) boundary. Across each of the boundaries, biodiversity declined sharply in fusulinid, rugose coral, brachiopod, ammonite, conodont, and radiolaria. Both boundaries are characterized by two biohorizons, i.e., one marked by major extinction of pre-existing fauna and the other by the first appearance of younger fauna. It is noteworthy that a peculiar rhyo-dacitic tuff bed occurs at each of the extinction horizons. Thus the Late Permian biosphere was strongly affected twice by highly explosive, severe volcanism. Regional correlation of the G-L and P-T boundary tuff beds throughout South China, and partly to Japan, positively suggests a cause-effect link between large-scale explosive volcanism and mass extinction.
AB - Precise stratigraphic analysis of Middle-Upper Permian and Lower Triassic sequence at Chaotian in northern Sichuan, China, identified two remarkable mass extinction horizons, one at the Middle-Upper Permian (Guadalupian-Lopingian; G-L) boundary and the other at the Upper Permian-Lower Triassic (P-T) boundary. Across each of the boundaries, biodiversity declined sharply in fusulinid, rugose coral, brachiopod, ammonite, conodont, and radiolaria. Both boundaries are characterized by two biohorizons, i.e., one marked by major extinction of pre-existing fauna and the other by the first appearance of younger fauna. It is noteworthy that a peculiar rhyo-dacitic tuff bed occurs at each of the extinction horizons. Thus the Late Permian biosphere was strongly affected twice by highly explosive, severe volcanism. Regional correlation of the G-L and P-T boundary tuff beds throughout South China, and partly to Japan, positively suggests a cause-effect link between large-scale explosive volcanism and mass extinction.
KW - Acidic volcanism
KW - Guadalupian-Lopingian (G-L) boundary
KW - Mass extinction
KW - Permo-Triassic boundary (P-T)
KW - South China
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U2 - 10.2183/pjab.80.10
DO - 10.2183/pjab.80.10
M3 - Article
AN - SCOPUS:2342595206
VL - 80
SP - 10
EP - 16
JO - Proceedings of the Japan Academy Series B: Physical and Biological Sciences
JF - Proceedings of the Japan Academy Series B: Physical and Biological Sciences
SN - 0386-2208
IS - 1
ER -