| 黔西滇东地区二叠纪-三叠纪之交有机碳同位素和生物地层对比 |
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| 引用本文： | 曹怡然,王垚,缪雪,吴奎,吴玉样,宋海军,宋虎跃,童金南,楚道亮.黔西滇东地区二叠纪-三叠纪之交有机碳同位素和生物地层对比[J].地球科学,2022,47(6):2264-2274. |
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| 作者姓名： | 曹怡然 王垚 缪雪 吴奎 吴玉样 宋海军 宋虎跃 童金南 楚道亮 |
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| 作者单位： | 1.中国地质大学生物地质与环境地质国家重点实验室, 中国地质大学地球科学学院, 湖北武汉 430074 |
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| 基金项目： | 国家自然科学基金项目(Nos.42030513,42072025)； |
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| 摘 要： | 二叠纪-三叠纪之交海、陆相地层对比研究对陆相二叠系-三叠系界线的定义以及全面认识该全球性重大生物与环境突变事件具有重要意义，是当前国际古生物学与地层学研究的重点和难点.选择贵州六盘水仲河二叠系-三叠系界线剖面为研究对象，系统研究了该剖面的化石面貌和有机碳同位素演变特征.结合黔西滇东地区二叠纪-三叠纪之交良好的陆相、海陆过渡相和浅海碎屑岩相地层记录，初步搭建了海、陆相生物地层与有机碳同位素地层对比框架.值得关注的是，综合已有研究的陆相和海陆过渡相剖面植物有机碳同位素和海相剖面无机碳同位素数据，发现均存在相同的碳同位素演变特征，且与生物地层对比方案一致.据此，认为高分辨率的有机碳同位素化学地层是实现海-陆相地层对比的有效手段之一.
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| 关 键 词： | 二叠纪-三叠纪之交 海、陆对比 化学地层 生物地层 大灭绝 |
| 收稿时间： | 2021-12-03 |
Organic Carbon Isotopes and Biostratigraphic Corelation during Permian-Triassic Transition in Western Guizhou and Eastern Yunnan |
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| Abstract: | The correlation between the marine and terrestrial Permian-Triassic (P-Tr) strata has a great significance for the definition of the terrestrial P-Tr boundary and the comprehensive understanding for the nature of this global biotic and environmental event. In the present study, it investigated the fossils and organic carbon isotopes of the P-Tr boundary section of Zhonghe in Liupanshui City, Guizhou Province. A preliminary framework for the correlation of marine and terrestrial biostratigraphy and organic carbon isotope stratigraphy was established by combining the previous studies in this area. Moreover, the organic carbon isotopes of plants and marine inorganic carbon isotopes share the same trends, which are confirmed by the evidence of the biostratigraphic correlation framework. Accordingly, it concludes that high-resolution chemostratigraphy of organic carbon isotope is one of the effective proxies to achieve marine and terrestrial stratigraphic correlation. |
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