石油与天然气地质 ›› 1993, Vol. 14 ›› Issue (1): 53-60.doi: 10.11743/ogg19930107

• 论文 • 上一篇    下一篇

留山、马市坪盆地构造特征及其形成演化

王定一, 王立宝   

  1. 西北大学地质系 西安710069
  • 收稿日期:1992-08-04 出版日期:1993-03-25 发布日期:2012-01-16

TECTONIC CHARACTERISTICS AND EVOLUTION OF LIUSHAN AND MASHIPING BASINS

Wang Dingyi, Wang Libao   

  1. Department of Geology, Northwest University, Xian
  • Received:1992-08-04 Online:1993-03-25 Published:2012-01-16

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摘要：

留山、马市坪盆地是秦岭-大别构造带北秦岭褶皱带上两个中生代沉积盆地。前者为晚三叠世坳陷型湖盆,后者是晚侏罗-早白垩世早期断陷型湖盆。由于燕山中晚期运动自北而南的逆冲推覆作用的改造,使二者均具压扭型盆地面貌。它们是华北板块与扬子板块于中生代作陆-陆碰撞过程中不同阶段的产物。

关键词: 北秦岭褶皱带, 留山盆地, 马市坪盆地, 构造特征, 盆地演化

Abstract:

Liushan and Mashiping Basins are located in Western Henan Frovince,North Qinling Belt.Their basements are Precambrian-Lower Paleozoie rocks,and the covering series are Upper Triassic,Upper Jurassic-Lower Cretaceous respectively.Liushan Basin is a complex syncline composed of two syncline and an anticline belts.The major faults are NWW-strike thrusts which do not control the distribution of strata.A complex syncline was also identified in Mashiping Basin.Its axis trend varied from NWW to NE-NNE direction,and was cut by boundary fault of the basin;its eastern section was almost completely destroyed by a southward thrust.The Meso-Cenozoic tec-tonic evolution can be divided into seven stages:regional uplift period(ANT3);depression period after regional uplift(T3);compresso-uplift period(J1+2);fault-subsidence period in tenso-shear condition(J3+K11);overthrust-nappe period(K12);extensional fault-subsidence period(K2+E?)and regional compresso-uplift period(N+Q).The prototype of Liushan Basin was a compressional basin,and that of Mashiping was an extensional one.Both of them were reformed by large scale southward overthrust-wrenching during late Yenshanian movement and became compresso-shear basins during the continent-continental collision between Yangtze and North China Plates.