| 烃源岩中C19~C29甾烷系列和25 降藿烷系列的检出及其地质意义 |
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| 引用本文： | 王作栋,孟仟祥,陶明信,王晓锋,李中平,徐永昌.烃源岩中C19~C29甾烷系列和25 降藿烷系列的检出及其地质意义[J].沉积学报,2009,27(1):180-185. |
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| 作者姓名： | 王作栋 孟仟祥 陶明信 王晓锋 李中平 徐永昌 |
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| 作者单位： | 中国科学院地质与地球物理研究所 气体地球化学重点实验室 兰州 730000 |
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| 基金项目： | 教育部科技重大项目，中国科学院西部之光人才培养计划地方在职博士项目 |
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| 摘 要： | 沉积有机质中通常可检测到C21（孕甾烷）、C22（升孕甾烷）和C27~C29甾烷，但C19、C20和C23~C26甾烷并不常见。在三塘湖盆地芦草沟组黑色页岩中检出了完整的C19~C29甾烷系列和25 降藿烷系列。如此完整且丰度较高的此类化合物，尚无文献报道。这一新的资料可能蕴含着丰富的油气地球化学信息。初步认为这2个系列的化合物指示:其古环境为干旱和咸化水体环境；有机质以藻类和浮游生物等低等水生生物来源为主，在沉积初期遭受强烈的生物降解作用；原始有机质与细菌降解的产物共存，成为生烃先质。
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| 关 键 词： | 三塘湖盆地 烃源岩 C19~C29甾烷 25 降藿烷 生物降解 |
| 收稿时间： | 1900-01-01 |
Identification of C_(19)-C_(29) Steranes and 25-norhopanes in Source Rock and Geological Significance |
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| WANG Zuo-dong,MENG Qian-xiang,TAO Ming-xin,WANG Xiao-feng,LI Zhong-ping,XU Yong-chang.Identification of C_(19)-C_(29) Steranes and 25-norhopanes in Source Rock and Geological Significance[J].Acta Sedimentologica Sinica,2009,27(1):180-185. |
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| Authors: | WANG Zuo-dong MENG Qian-xiang TAO Ming-xin WANG Xiao-feng LI Zhong-ping XU Yong-chang |
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| Institution: | Institute of Geology and Geophysics, Key Laboratory of Gas Geochemistry, Chinese Academy of Sciences, Lanzhou 730000 |
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| Abstract: | Sterane series compounds such as C21,C22 and C27~C29 can be usually detected in sediments, however, C19,C20,C23~C26 steranes rarely occur in above geologic body. The C19~C29 sterane series and C26~C29 25-norhopanes are detected of high abundance in black-shale sample from Lucaogou Fomation, Santanghu Basin. Such abundant compounds contain much information in oil-gas geochemistry research, but until now, few research works have been carried out in the world. Based on our detail studies, a conclusion has been... |
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| Keywords: | Santanghu Basin source rock C19~C29 steranes 25-norhopanes biodegradation |
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