| Initial organic geochemical investigation on Late Neoproterozoic-Early Cambrian sediments in the Yangtze region, China |
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| 作者姓名： | WANG Tieguan WANG Chunjiang ZHANG Weibiao SHI Quan ZHU Lei CHEN Junyuan |
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| 作者单位： | Key Laboratory of Hydrocarbon Accumulation Mechanism of the Education Ministry, University of Petroleum, Beijing 102249, China,Key Laboratory of Hydrocarbon Accumulation Mechanism of the Education Ministry, University of Petroleum, Beijing 102249, China,Key Laboratory of Hydrocarbon Accumulation Mechanism of the Education Ministry, University of Petroleum, Beijing 102249, China,Key Laboratory of Hydrocarbon Accumulation Mechanism of the Education Ministry, University of Petroleum, Beijing 102249, China,Key Laboratory of Hydrocarbon Accumulation Mechanism of the Education Ministry, University of Petroleum, Beijing 102249, China,Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (Grant No. 40172049) |
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| 摘 要： | Totally 19 samples of typical Upper Proterozoic-Lower Cambrian sedimentary rocks were collected and analyzed for an organic geochemical investigation. Almost all these rocks have high TOCs, super-maturities and similar biomarker distribution. As an exception, however, the Sinian Nantuo Tillite shows much lower TOCs and little phytane and pristane in comparison with those in other strata, which implies a very faint photosynthetic process, and a restricted euphotic zone and quite limited sunlight within the sedimentary water column during the Sinian glaciation age in the western Yangtze region providing an evidence for palaeo-oceanic environment of the Neoproterozoic Snowball Earth age.
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| 关 键 词： | Late Neoproterozoic Early Cambrian molecular organic geochemistry euphotic zone Snowball Earth |
Initial organic geochemical investigation on Late Neoproterozoic-Early Cambrian sediments in the Yangtze region, China |
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| WANG Tieguan,WANG Chunjiang,ZHANG Weibiao,SHI Quan,ZHU Lei,CHEN Junyuan.Initial organic geochemical investigation on Late Neoproterozoic-Early Cambrian sediments in the Yangtze region, China[J].Progress in Natural Science,2003,13(12):936-941. |
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| Authors: | WANG Tieguan Wang Chunjiang Zhang Weibiao Shi Quan ZHU Lei CHEN Junyuan |
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| Institution: | 1. Key Laboratory of Hydrocarbon Accumulation Mechanism of the Education Ministry, University of Petroleum, Beijing 102249, China
2. Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China |
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| Abstract: | Totally 19 samples of typical Upper Proterozoic-Lower Cambrian sedimentary rocks were collected and analyzed for an organic geochemical investigation. Almost all these rocks have high TOCs, super-maturities and similar biomarker distribution. As an exception, however, the Sinian Nantuo Tillite shows much lower TOCs and little phytane and pristane in comparison with those in other strata, which implies a very faint photosynthetic process, and a restricted euphotic zone and quite limited sunlight within the sedimentary water column during the Sinian glaciation age in the western Yangtze region providing an evidence for palaeo-oceanic environment of the Neoproterozoic Snowball Earth age. |
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| Keywords: | Late Neoproterozoic Early Cambrian molecular organic geochemistry euphotic zone Snowball Earth |
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