Influence on Organic Matter Cauced by Mesozoic Transgressive Events in the Kuqa Depression, Tarim Basin
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摘要: 对库车河剖面三叠侏罗系重要生烃组段进行了有机质生物标志化合物及单体烃同位素研究,研究结果表明,海侵层位与非海侵层位在生物组成和生标特征等方面明显不同,海侵带来了不同的生物体,使有机质类型发生了改变。在生物标志化合物参数方面表现为Pr/Ph小于1,甾烷含量丰富,甾烷中C27化合物丰度与C29相当,三环萜烷有C21<C23>C24的分布特点,单体烃同位素表现出富集轻碳同位素的特点。中生代海侵事件对塔北隆起区及库车拗陷油气资源具有重要的意义。Abstract: Biomarker of organic matter and isotopic composition of n-alkanes in saturated hydrocarbon have been researched,and major samples are selected from Triassic and Jurassic important source rock in Kuqa section.From results we can see that characteristics of biomarker and biological composition in transgressive member are different from non-transgressive member.With various organisms input, the types of organic matter have been changed in transgressive processes.Biomarker parameters of transgressive member have specific characteristics:Pr/Ph less than 1,higher abundance of steranes,abundance of C27 are similar to C29 stertane,tricyclic terpane with feature of C21<C23>C24 and isotopic composition of nalkanes enriched 12C. Mesozoic transgressive events have important significance on oil and gas resources of Tabie uplift area and Kuqa depression in Tarim basin.
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Key words:
- Kuqa depression /
- Mesozoic era /
- transgression /
- characteristics of organic
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[1] 1.杨斌;李建新;诸长鼎依奇克里克油气田煤成油气的地球化学特征和库车坳陷含油气远景 1989(05)
2.陈丕基;Norling E 西藏构造楔与塔里木-华南地块的裂解 1994(16)
3.唐开疆塔里木盆地三叠系沉积特征及生烃潜力 1993(02)
4.陈荣林再论塔里木盆地中侏罗世的海泛事件沉积 1995(04)
5.周世新库车坳陷中生代沉积有机质与环境地球化学研究 1994
6.曾宪章;梁狄刚中国陆相原油和生油岩和生物标志物 1989
7.袁剑英古环境地球化学与油气形成研究 1994
8.Bjoroy M;Hall K;Gillyon P;Jumeau J Carbon isotopic variation in n-alkance and isoprenoies of whole oil 1991 -

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