松辽盆地茂206井青山口组一段有机地球化学特征  

Organic Geochemical Stratum Characteristics from Memberl of Qingshankou Formation in the Well Mao 206 of Songliao Basin

作　　者：韩刚[1] 王敬岩[2] 张文婧[2] 黄清华[2] 

机构地区：[1]东北石油大学地球科学学院,大庆163318 [2]大庆油田有限责任公司勘探开发研究院,大庆163712

出　　处：《科学技术与工程》2011年第15期3393-3397,共5页Science Technology and Engineering

基　　金：国家重点基础研究发展计划"973"项目(2006CB701403);国家自然科学基金项目(40802012)资助

摘　　要：松辽盆地白垩纪青山口组下部分布一套富含有机碳的黑色泥岩、页岩和油页岩沉积,是全盆地划分泉头组与青山口组的一级标志。茂206井青山口组黑色泥岩、页岩的地球化学特征研究表明:它具有相对高的有机碳、干酪根碳同位素正偏、重排甾烷含量低,普遍存在伽玛蜡烷生物标志化合物等有机地球化学特征,表征为白垩纪温室效应时间窗内古湖泊缺氧事件的产物。而青山口组底部出现的一些具重要时代意义的被子植物花粉,也证实了青山口组底界已属Turonian期,而非Ceno-manian期。The Songliao Basin was a large lacustrine one during Late Cretaceous,where the dark mudsones,shales and oil—shales of Qingshankou Formation were distributed widely and oilshales were considered as the primary marker beds of division and correlation in the basin.The dark shales and mudstones in Qingshankou Formation from well Mao 206 were of high organic carbon and low diasteranes contents.Organic geochemical characters were illustrated by biomarkers of gammacerane and positive excursion of kerogen isotopes.It is suggested that the dark mudstones and shales in the Member 1 of Qingshankou Formation are the products of lake anoxic in the extreme greenhouse climate period.Angiosperm farina at the bottom of Qingshankou Formation has significant era significance,it also proves that the age of the bottom of Qingshankou Formation in Songliao Basin should be Turonian and be not Cenomanian.

关 键 词：黑色页岩 有机地球化学 青山口组 松辽盆地 

分 类 号：P618.13[天文地球—矿床学]