| 柴达木盆地东部烃源岩的生源与沉积环境 |
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| 引用本文： | 刘洛夫.柴达木盆地东部烃源岩的生源与沉积环境[J].古地理学报,2001,3(2):82-91. |
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| 作者姓名： | 刘洛夫 |
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| 作者单位： | 石油大学盆地与油藏研究中心 北京，102249 |
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| 摘 要： | 用色谱-质谱、稳定同位素质谱等分析测试技术，对柴达木盆地东部地区寒武系、奥陶系、泥盆系、石炭系和侏罗系岩样进行地球化学特征分析。从饱和烃生物标志化合物特征、正构烷烃单体碳同位素分布特征等方面入手，对该区的烃源岩的生源与沉积环境作了详细研究。结果表明，柴达木盆地东部地区古生界有机质多为菌、藻类生源，少数有陆源有机质混入（主要是石炭系）。有机质多为强还原环境的海相沉积，少数为海陆过渡相沉积。侏罗系在一些地区和层段并非典型的成煤环境，而是属于滨浅湖相，少数为半深湖-深湖环境，因此具有一定的生烃能力。
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| 关 键 词： | 柴达木盆地 烃源岩 沉积环境 生物标志化合物 |
| 修稿时间： | 2000年9月8日 |
SEDIMENTARY ENVIRONMENTS OF SOURCE ROCKS IN THE EASTERN QAIDAM BASIN |
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| Liu Luofu,The University of Petroleum.SEDIMENTARY ENVIRONMENTS OF SOURCE ROCKS IN THE EASTERN QAIDAM BASIN[J].Journal of Palaeogeography,2001,3(2):82-91. |
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| Authors: | Liu Luofu The University of Petroleum |
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| Institution: | Basin & Reservoir Research Center, the University of Petroleum, Beijing, 102249 |
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| Abstract: | The geochemical characteristics of rock samples of the Cambrian, Ordovician, Devonian, Carboniferous and Jurassic in the eastern Qaidam Basin were investigated through the methods of GC MS, GC MS MAT, etc. Based on the characteristics of saturated hydrocarbon biomarker and stable carbon isotope composition of individual n alkanes, the sedimentary environments of this area were studied in detail. The results show that in the eastern Qaidam Basin, the Palaeozoic organic matters were mainly from bacteria and algae, and some Palaeozoic source rocks (mainly Carboniferous) contained terrestrial bio inputs. Majority of these organic matters were deposited in a strongly reducing marine environment, and a few of them in a transitional one. The Jurassic in some areas and some geologic periods was deposited in an environment of lake beach or shallow lake (semi deep to deep lake in local areas), and was not in a typical coal forming environment. Therefore, the Jurassic of the eastern Qaidam Basin had oil generating potential. |
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| Keywords: | Qaidam Basin source rock sedimentary environment biomarker stable carbon isotope of individual n alkane |
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