| Cambrian- Ordovician Deep - Water Deposits in Southwest Jiangxi, China |
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| 作者姓名： | Ji LeiNanjing Institute of Geography and Limnology Academia Sini Nanjing Jiang Minxi |
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| 作者单位： | Ji LeiNanjing Institute of Geography and Limnology，Academia Sinica，Nanjing Jiang Minxi |
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| 摘 要： | The Cambrian-Ordovician rocks in southwestern Jiangxi are mainly composed of deep-water deposits, in which 5 facies have been recognized: sandstone facies, sandstone-mudstone facies, siltstone-mudstone facies, mudstone (slate)facies, and chert facies. They are of turbidity current origin and are related to pelagic and hemipelagic deposits. In the light of facies distribution, the Cambrian-Ordovician deposits can be classified into 3 facies associations formed in middle fan, outer fan and deep-sea plain environments respectively. The 3 different orders of vertical cycles in the stratigraphic sequence are considered to be controlled by factors such as sea-level fluctuation, basin subsidence and submarine fan progradation. The tectonic setting of the sedimentary basin is interpreted as passive continental margin based on the chemical composition analysis of the sandstone.
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Cambrian- Ordovician Deep - Water Deposits in Southwest Jiangxi, China |
| |
| Authors: | Ji LeiNanjing Institute of Geography and Limnology Academia Sinic Nanjing Jiang Minxi |
| |
| Abstract: | The Cambrian-Ordovician rocks in southwestern Jiangxi are mainly composed of deep-water deposits, in which 5 facies have been recognized: sandstone facies, sandstone-mudstone facies, siltstone-mudstone facies, mudstone (slate)facies, and chert facies. They are of turbidity current origin and are related to pelagic and hemipelagic deposits. In the light of facies distribution, the Cambrian-Ordovician deposits can be classified into 3 facies associations formed in middle fan, outer fan and deep-sea plain environments respectively. The 3 different orders of vertical cycles in the stratigraphic sequence are considered to be controlled by factors such as sea-level fluctuation, basin subsidence and submarine fan progradation. The tectonic setting of the sedimentary basin is interpreted as passive continental margin based on the chemical composition analysis of the sandstone. |
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| Keywords: | deep-water deposits turbidite pelagite and hemipelagite submarine fan vertical cycles |
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