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| Genesis study of high abundant 17a（H）-diahopanes in Lower Cretaceous lacustrine source rocks of the Lishu Fault Depression,Songliao Basin,Northeast China | |
| 作者姓名： | LIU Haiyu ZHANG Min LI Xing |
| 作者单位： | [1]School of Earth Environment and Water Resources, Yangtze University, Wuhan 430100, China [2]Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Jingzhou 434023, China [3]Zhanjiang Branch ofCNOOC Ltd, Guangdong 5244057, China |
| 基金项目： | Acknowledgements This research project is financially supported by the National Natural Science Foundation of China （Grant No. 41272170）. |
| 摘 要： | Relatively abundant 17α（H）-diahopanes have been detected in the lower cretaceous lacustrine source rocks from the Lishu Fault Depression in the Songliao Basin Northeast China. Rich long chain tricyclic terpanes （carbon number up to C35） and gammacerane have been observed in those source rocks with relatively abundant 17α（H）-diahopanes, which is rarely seen in previous reports. In this paper, the formation of 17α（H）-diahopanes has been discussed from three aspects including maturity, oxidation-reduction nature of depositional environment and parent material composition by the GC/MS analyses. The results reveal that maturity and oxidation-reduction nature of depositional environment have little effect on the formation of 1 7α（H）-diahopanes in the investigated area. How- ever, the positive correlation between long-chain tricyclic terpanes and 17α（H）-diahopanes argues strongly for a common origin, and the origin is related to the algaes in saline water environment. The algaes in saline water envi- ronment may be a kind of origin of 1 7α（H）-diahopanes. |
| 关 键 词： | 中国东北地区 湖相烃源岩 重排藿烷 梨树断陷 松辽盆地 下白垩统 A（H） 成因 |
Genesis study of high abundant 17α(H)-diahopanes in Lower Cretaceous lacustrine source rocks of the Lishu Fault Depression,Songliao Basin,Northeast China |
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| LIU Haiyu,ZHANG Min,LI Xing.Genesis study of high abundant 17α(H)-diahopanes in Lower Cretaceous lacustrine source rocks of the Lishu Fault Depression,Songliao Basin,Northeast China[J].Chinese Journal of Geochemistry,2014,33(2):201-206. | |
| Authors: | Haiyu Liu Min Zhang Xing Li |
| Institution: | 1. School of Earth Environment and Water Resources, Yangtze University, Wuhan, 430100, China 2. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Jingzhou, 434023, China 3. Zhanjiang Branch of CNOOC Ltd., Guangdong, 5244057, China |
| Abstract: | Relatively abundant 17α(H)-diahopanes have been detected in the lower cretaceous lacustrine source rocks from the Lishu Fault Depression in the Songliao Basin Northeast China. Rich long chain tricyclic terpanes (carbon number up to C35) and gammacerane have been observed in those source rocks with relatively abundant 17α(H)-diahopanes, which is rarely seen in previous reports. In this paper, the formation of 17α(H)-diahopanes has been discussed from three aspects including maturity, oxidation-reduction nature of depositional environment and parent material composition by the GC/MS analyses. The results reveal that maturity and oxidation-reduction nature of depositional environment have little effect on the formation of 17α(H)-diahopanes in the investigated area. However, the positive correlation between long-chain tricyclic terpanes and 17α(H)-diahopanes argues strongly for a common origin, and the origin is related to the algaes in saline water environment. The algaes in saline water environment may be a kind of origin of 17α(H)-diahopanes. |
| Keywords: | diahopanes long-chain tricyclic terpanes oxidation-reduction nature parent material composition Lishu Fault Depression |
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