| 湖南慈利礁相二叠系-三叠系界线地层及其对大灭绝事件的启示 |
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| 引用本文： | 宋逢林,杨浩,王钦贤.湖南慈利礁相二叠系-三叠系界线地层及其对大灭绝事件的启示[J].华南地质与矿产,2010(3):51-56. |
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| 作者姓名： | 宋逢林 杨浩 王钦贤 |
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| 作者单位： | 1. 湖南天源国土资源勘查有限公司,长沙,410007
2. 中国地质大学生物地质与环境地质教育部重点实验室,武汉,430074 |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | 湖南慈利康家坪长兴组礁相地层上直接覆以大冶组"错时相"钙质微生物岩、鲕状灰岩、蠕虫状灰岩等沉积物。岩相、生物地层和碳同位素演变表明大灭绝事件处地层连续;剖面上长兴期末的化石分布呈现一种单幕式灭绝型式和过程;占据大灭绝后浅水碳酸盐相的是一种以微生物主导的"异常生态系"。
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| 关 键 词： | 二叠纪-三叠纪之交 灭绝型式 微生物生态系 湖南慈利 |
Reef Facies Strata of Permian-Triassic Boundary in Kangjiaping Section, Cili Area, Hunan Province and Its Implications for Biological Mega-deracination |
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| SONG Feng-lin,YANG Hao,WANG Qin-xian.Reef Facies Strata of Permian-Triassic Boundary in Kangjiaping Section, Cili Area, Hunan Province and Its Implications for Biological Mega-deracination[J].Geology and Mineral Resources of South China,2010(3):51-56. |
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| Authors: | SONG Feng-lin YANG Hao WANG Qin-xian |
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| Institution: | 1.Tianyuan Exploration Company LTD of Hunan Land and Mineral Resources,Changsha 410007;2.Key Laboratory of Biogeology and Environmental Geology of Ministry of Education,China University of Geosciences,Wuhan 430074) |
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| Abstract: | The reef facies of the Changxing Formation is overlaid by the ＂anachronistic facies＂ such as calcimicrobialite,oolitic limestone and vermicular limestone of the Daye Formation at Kajiaping section,Cili area,Hunan Province.The lithology,biostratigraphy and carbon isotope excursion of those reef facies indicate that the sequence is continuous across the mass extinction boundary.The distribution of fossils in the latest Changhsingian at the section shows a single-episode pattern and process of mass extinction.The shallow carbonate facies was occupied by a ＂abnormal ecosystem＂ dominated by microbes in the aftermath of mass extinction. |
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| Keywords: | Permian-Triassic transition extinction pattern microbial ecosystem Cili Hunan |
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