| Lower Triassic Inorganic Carbon Isotope Excursion in Chaohu, Anhui Province, China |
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| 作者姓名： | TongJinnan Qiuhaiou |
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| 作者单位： | ChinaUniversityofGeosciences,Wuhan430074 |
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| 基金项目： | ThisresearchissupportedbytheChinese“ 973Program” (No .
G2 0 0 0 0 7770 5 )，theNationalNaturalScienceFoundationofChina (No .
40 0 72 0 11)，theChinaNationalCommissiononStratigraphyandthe
YichangCenterofStratigraphyandPaleontology . |
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| 摘 要： | This paper reports a Lower Triassic carbon isotope profile from the North Pingdingshan Section in Chaohu, Anhui Province, China, which was stituated in a deep part of the Lower Yangtze carbonate rapm. The δ(^13C) excursion shows two periods from the Permian-Triassic boundary to the lower Spathian substage, corresponding to the ecosystem undergoing evolution and recovery after the end-Permian mass extinction and related events.The first period starts at the δ(^13C) depletion caused by the mass extinction and evolves with a gradual δ(^13C) increase resulting from the development of some disaster taxa during the Induan. The strong Smithian δ(^13C) depletion in the second period might be formed by the collapse of the disaster ecosystem and the biotic recovery occurred with the explosive increase of bioproductivity in the Spathian. Thus the δ(^13C) excursion in the Lower Triassic expresses patterns of biotic evolution and recovery during the eratic ecosystem that followed the great end-Permian mass extinction.
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| 关 键 词： | 下三叠纪 无机碳同位素 安徽 巢湖地区 灭绝事件 |
Lower Triassic Inorganic Carbon Isotope Excursion in Chaohu, Anhui Province, China |
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| Tong Jinnan,Qiu Haiou,Zhao Laishi,Zuo Jingxun.Lower Triassic Inorganic Carbon Isotope Excursion in Chaohu, Anhui Province, China[J].Journal of China University of Geosciences,2002,13(2):98-106. |
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| Authors: | Tong Jinnan Qiu Haiou Zhao Laishi Zuo Jingxun |
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| Abstract: | This paper reports a Lower Triassic inorganic carbon isotope profile from the North Ping-dingshan Section in Chaohu, Anhui Province, China, which was situated in a deep part of the LowerYangtze carbonate ramp. The δ(13C) excursion shows two periods from the Permian-Triassic boundaryto the lower Spathian substage, corresponding to the ecosystem undergoing evolution and recovery afterthe end-Permian mass extinction and related events. The first period starts at the δ (13 C) depletioncaused by the mass extinction and evolves with a gradual δ(13C) increase resulting from the developmentof some disaster taxa during the Induan. The strong Smithian δ(13 C) depletion in the second periodmight be formed by the collapse of the disaster ecosystem and the biotic recovery occurred with the explo-sive increase of bioproductivity in the Spathian. Thus the δ(13C) excursion in the Lower Triassic expres-ses patterns of biotic evolution and recovery during the erratic ecosystem that followed the great end-Permian mass extinction. |
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| Keywords: | Lower Triassic inorganic carbon isotope extinction and recovery Chaohu Anhui Province |
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