摘要
四川盆地东北部地区上三叠统须家河组须四段是油气勘探的重点层段,该地区的沉积受到多物源的影响.通过对研究区重矿物、碎屑组分、岩屑成分和古水流方向的分析,最终确定了研究区须四段的物源来自龙门山、大巴山和米仓山3个方向.其中,元坝西部地区物源来自于龙门山褶皱带方向;元坝东部地区物源来自大巴山褶皱带东南部方向;元坝中部部分地区表现为龙门山和大巴山的混合堆积;通南巴西部地区物源来自米仓山褶皱带方向,通南巴东部物源表现为大巴山和米仓山的混合堆积.
The 4th Member of Xujiahe Formation, Upper Triassic, in the northeastern Sichuan Basin is a key layer for oil-gas exploration. The deposition in the area is affected by multiple provenances. By analyzing the heavy minerals, clastic constituents, debris compositions and paleocurrent directions, it is finally determined that the provenances originate from three directions, namely, Longmenshan, Dabashan and Micangshan. The provenance of the western Yuanba is from Longmenshan fold belt;that of the eastern Yuanba, from the southeast of Dabashan fold belt;that of the central Yuanba, from the mixed accumulation of Longmenshan and Dabashan;that of the western Tongnanba area, from the Micangshan fold belt;while that of the eastern Tongnanba area, from the mixed accumulation of Dabashan and Micangshan.
作者
毕亦巍
张昌民
BI Yi-wei;ZHANG Chang-min(School of Earth Sciences,Yangtze University,Wuhan 430100,China)
出处
《地质与资源》
CAS
2019年第2期134-139,159,共7页
Geology and Resources
基金
国家科技重大专项"川东陆相致密碎屑岩油气富集规律与目标优选"(2016ZX05002-004-003)
关键词
四川盆地东北部
须家河组四段
物源方向
northeast of Sichuan Basin
4th Member of Xujiahe Formation
provenance direction
作者简介
毕亦巍(1994-),女,硕士研究生,矿产普查与勘探专业,储层地质学方向,通信地址湖北省武汉市蔡甸区长江大学地球科学学院,E-mail//1205570991@qq.com.
