NUMERICAL MODELLING OF JURASSIC-EARLY CRETACEOUS STRESS FIELD IN MINHE BASIN

Cao Shoulian; Yang Nong

doi:10.11743/ogg19970206

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NUMERICAL MODELLING OF JURASSIC-EARLY CRETACEOUS STRESS FIELD IN MINHE BASIN
Vol. 18, Issue 2, Pages: 115-119(1997)
Online First：25 June 1997，

Published：1997
DOI： 10.11743/ogg19970206
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DOI：

Cao Shoulian, Yang Nong. NUMERICAL MODELLING OF JURASSIC-EARLY CRETACEOUS STRESS FIELD IN MINHE BASIN[J]. 1997, 18(2): 115-119. DOI： 10.11743/ogg19970206.

摘要

民和盆地构造应力场模拟结果表明

侏罗纪和早白垩世时盆地分别处于左旋剪切和右旋剪压应力场下

由此派生的伸展应力场决定了民和盆地属伸展性盆地。模拟预测的次级盆地的发育部位和构造的展布方向与地质研究相吻合

即侏罗纪控制盆地形成的构造以NWW向为主;早白垩世时

控制盆地形成的构造以NE或NNE向为主;含煤层序发育在呈分割性的次级盆地中。

Abstract

The numerical modelling of tectonic stress field in Minhe Basin during Jurassic Early Cretaceous was made.The result indicates that the basin was in sinistral shear and dextral transportation regime.The induced stress field under the regime determined the basin to be a extentional one.The situs of sub basins and the direction of structural distribution that predicted by the modelling have been verified by geological survey.The Jurassic structures trend was NEE

whereas Early Cretaceous structures extended NE or NWW

and coal bearing sequences developed in separated sub basins during Middle Jurassic.