| 羌塘盆地雁石坪地区中-晚侏罗世碳、氧同位素特征与沉积环境分析 |
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| 关键词:carbon,oxygen isotope Qiangtang basin Yanshiping Jurassic sedimentary environment |
| 基金项目:国土资源部国际合作与科技司“十五”重大基础研究项目(编号:20010208) |
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| 摘要: |
| Analysis of Carbon and Oxygen Isotope Composition and Sedimentary Environment of the Yanshiping Area of the Qiangtang Basin in Middle-Late Jurassic |
| An analysis of C and O isotopic compositions of Middle-Upper Jurassic carbonates demonstrates that the original components of the carbonates have been well preserved. Their variations are consistent with the sedimentary facies and the sea level curve,showing a good response to the sedimentary environment. Based on an analysis of the response,the authors have reached some conclusions.In Middle Jurassic Quemocuo period,the sedimentary environment was an offshore terrigenous fresh water lake. In Middle Buqu period,there was an open sea carbonate plateau.In Middle Jurassic Xiali period,the marine delta plain,coastal fresh lagoon and tidal flat existed.In the early Suowa period of Late Jurassic,the environment was a localized sea carbonate plateau.There existed a transgressive-regressive cycle and a transgressive cycle from the Middle Jurassic to the early period of Late Jurassic. |
| TAN Fu-wen,WANG Jian,WANG Xiao-long,DU Bai-wei.2004.Analysis of Carbon and Oxygen Isotope Composition and Sedimentary Environment of the Yanshiping Area of the Qiangtang Basin in Middle-Late Jurassic[J].Acta Geoscientica Sinica,25(2):119-126. |
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