大庆石油地质与开发

2007, No.121(03) 39-42+46

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汤原断陷古近纪砂岩重矿物组合与物源分析
Combination of paleogene sandstone heavy mineral and source analysis in Tangyuan Rift

王洪伟,杨建国,林东成
WANG Hong-wei1,YANG Jian-guo1,2

摘要(Abstract):

采用相关分析及Q型聚类分析方法对汤原断陷20口钻孔古新世—渐新世的砂岩中重矿物进行统计分析,指出了研究区重矿物组合纵向上变化规律明显受构造因素的控制,横向上的分布受物源区源岩性质的影响。结合古水流方向、沉积相特征和岩屑所反映的源区岩性特点,恢复了汤原断陷古近系物源方向主要为北西和南东两个方向,母岩主要为中酸性侵入岩,具有少量的中高级变质岩和沉积岩。
The heavy mineral located in sand between Palaeocene and Oligocene of 20 drilled wells in Tangyuan Rift are analyzed by relative analysis and polymer with Q type analysis and indicates that,in test areas,variation rules of heavy mineral combination are vertically controlled by structural factors,while horizontal distribution is influenced by source rock property in source areas.Association with palaeoflow direction,sedimentary facies and lithologic characteristics reflected by cuttings,paleogene physical source direction in Tangyuan Rift is recovered,which is main N-W and S-E.Mother rock is mainly consisted of intermediate acidity invasion rock with less middle and high metamorphic rock and sedimentary rock.

关键词(KeyWords): 重矿物组合;物源分析;古近纪;汤原断陷
heavy mineral combination;source analysis;paleogene;Tangyuan Rift

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作者(Author): 王洪伟,杨建国,林东成
WANG Hong-wei1,YANG Jian-guo1,2

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