摘要
结合盆地区域地质背景、岩石类型、重矿物组合、岩屑类型、砂体展布及古流向等特征,本文重点应用稀土元素配分模式对鄂尔多斯盆地宜川地区延长组长7进行了物源分析。结果表明:鄂尔多斯盆地宜川地区的物源主要来自北部大青山地区太古界乌拉尔山群,东部吕梁山以及南部秦祈造山带此时并未对其提供物源。
On the basis of the areal geology, the types and compositions of the parent rocks, heavy mineral assemblages, the types of clastic debris, sandstone distribution and the orientation of palaeocurrent, mainly according to REE pattern, the article analyzes sedimentary source of the Chang7 pay sets in Yanchang Formation in Yichuan area, Ordos Basin. The results of research in this study disclose that the sedimentary in Yichuan area, Ordos Basin mainly came form Archeozoic Uralian Mountains in Daqingshan area, Northern Ordos Basin. At that time, Lvliang Mountains in the east and Qinqi orogenic zone in the south didn＇t provide source rocks for Yichuan area.
出处
《内蒙古石油化工》
CAS
2008年第13期143-145,共3页
Inner Mongolia Petrochemical Industry
关键词
鄂尔多斯盆地宜川地区
延长组长7
物源分析
重矿物
岩屑
REE配分模式
Ordos Basin
Yichan area
The Chang7 pay sets in Yanchang
The analysis of sedimentary source
Heavy minerals
Clastic debris
REE pattern
