石油与天然气地质 ›› 1990, Vol. 11 ›› Issue (2): 127-135.doi: 10.11743/ogg19900202

• 论文 • 上一篇    下一篇

内蒙古西部巴彦浩特盆地的构造特征及其演化

汤锡元1, 冯乔1, 李道燧2   

  1. 1. 西北大学;
    2. 长庆油田
  • 收稿日期:1989-12-11 出版日期:1990-06-25 发布日期:2012-01-16

TECTONIC CHARACTERISTICS AND EVOLUTION OF BAYANHOT BASIN,WESTERN INNER MONGOLIA

Tang Xiyuan1, Feng Qiao1, Li Daosui2   

  1. 1. Northwest University;
    2. Changqing Oilfield
  • Received:1989-12-11 Online:1990-06-25 Published:2012-01-16

PDF (PC)

375

被引次数

33

摘要：

这是一个叠置在不同结晶基底上的中、新生代断陷盆地。中元古—早古生代时,西北部隆起,南部位于祁连海槽的被动大陆边缘,东部为坳拉槽。晚古生代南部为前渊,东部为碰撞谷。二叠、三叠纪时全区大面积隆起。侏罗纪发生裂陷形成分隔的许多小盆地,早白垩世才形成统一的盆地,之后即开始隆升。盆内构造以正断层为主,伴生滚动背斜;南部有少量逆断层和挤压褶皱。石炭系是主要生油气层,因此,有较厚石炭系分布的东部和南部坳陷带的含油气远景最佳。

关键词: 巴彦浩特盆地, 含油气盆地, 盆地演化, 构造特征, 油气资源评价, 石炭系

Abstract:

The Bayanhot Basin is a Meso-Cenozoic faulted basin,which is superimposed on dis-tinct crystalline basement.With Chaxan fault as the boundary,the north of it is the stable Alxa Massif,and the south is the active Qilian folded belt.The structures within the basin are characterized by normal faults associated with rolling anticlines.A few thrusts and compressive folds are distributed mainly over thesouth part.The direction of the structures is NWW trending in the south part,NE in north-west and near SN in the east.In the Middle Proterozoic-Early Palaeozoic,the northwest Part of the basin wasrosen,the south part was the passive continental margin of Qilian trough,and east parta aulacogen.In the Late Palaeozoic,its south part was a foredeep and the east part wasa impactogen.The region was widely uplifted and magmations and faults occurred during the Permian-Triassic,marked the beginning of fragmentation of Alxa Massif.A lot of minor faulted basins separately occurred in the Jurassic.It became an unitary sedimentarybasin in the Early Cretaceous.At the end of Early Cretaceous,the basin uplifted again andthe activity diminished gradually.The Carboniferous source bed has so far been evidenced in the basin,discoveringmany oil-bearing formations in it.Therefore,the east and the south depressed zones withthick Carboniferous sediments are the most favourable region in oil and gas potential.