摘要
应用陆源碎屑轻、重矿物组合特征、砂岩岩屑类型特征及古水流特征等物源分析手段,结合区域构造演化特征,对川西坳陷中段上三叠统须家河组二、四段的物源方向进行了研究。研究结果表明,川西坳陷中段上三叠统须家河组二段主要受到了来自西北部逐渐隆起的龙门山、东北部秦岭大巴山、南部康滇古陆,以及少量川中古隆起物源的影响;而须家河组四段沉积时期,由于受安县运动的影响,主要受到了来自西部龙门山、少量东北部秦岭大巴山以及南部康滇古陆物源的影响。
By means of the light and heavy mineral assemblage feature,cutting types and paleocurrent,in combination with regionally structural evolution,the authors studied the source direction of the second and forth member of Xujiahe formation in the middle part of western Sichuan depression.The results prove that the source direction of the second member of Xujiahe formation in the middle part of western Sichuan depression is mainly controlled by the upheaved gradually Longmen Mountains in the northwest,the Qinling Dabashan Mountains in the northeast,the Kangdian Land in the south and the palaeohigh of the Central Sichuan.However,influenced by the Anxian movement,the source direction of the sedimentary period of the fourth member of Xujiahe formation is mainly controlled by the upheaved gradually Longmen Mountains in the northwest and the Kangdian Land in the south.
出处
《石油地质与工程》
CAS
2013年第6期26-29,148-149,共4页
Petroleum Geology and Engineering
基金
国家科技重大专项"碎屑岩层系大中型油气田富集规律与勘探关键技术"(2011ZX05002-004)
关键词
川西坳陷
须家河组
物源分析
the middle part of western Sichuan depression
the second and fourth member of Xujiahe formation
provenance analysis
