石油与天然气地质 ›› 2009, Vol. 30 ›› Issue (5): 576-583.doi: 10.11743/ogg20090507

• 四川盆地及邻区油气地质 • 上一篇    下一篇

陕南镇巴地区大巴山与米仓山构造交接关系

裴先治1,2, 李瑞保2, 丁仨平1,2, 刘战庆2, 李佐臣2, 冯建赟2, 孙雨2, 张亚峰2   

  1. 1. 长安大学 西部矿产资源与地质工程教育部重点实验室,陕西 西安 710054;
    2. 长安大学 地球科学与资源学院,陕西 西安 710054
  • 收稿日期:2009-06-12 出版日期:2009-10-25 发布日期:2012-01-16
  • 基金项目:

    中国石油化工股份有限公司海相前瞻性研究项目;国家自然科学基金项目(40572121)

Tectonic intersection relationship between Dabashan and Micangshan in Zhenba area,southern Shaanxi Province

Pei Xianzhi1,2, Li Ruibao2, Ding Saping1,2, Liu Zhanqing2, Li Zuochen2, Feng Jianyun2, Sun Yu2, Zhang Yafeng2   

  1. 1. Key Lab of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Chang'an University, Xi'an, Shaanxi 710054, China;
    2. College of Earth Science and Resources, Chang'an University, Xi'an, Shaanxi 710054, China
  • Received:2009-06-12 Online:2009-10-25 Published:2012-01-16

摘要:

米仓山与大巴山构造交接的陕南镇巴地区具有典型的叠加褶皱构造。米仓山地区近东西-北东东向褶皱构造与大巴山近南北-北北东向紧闭褶皱构造呈横跨叠加构造样式。司上地区发育的叠加褶皱表明,近南北向褶皱叠加改造早期近东西向褶皱,致使区域地层呈近南北向产出;两期褶皱发育的时代应为J3—K1,米仓山褶皱变形的时间要略早于南大巴山西段镇巴地区变形时间,分别为晚侏罗世(J3)和晚侏罗世—早白垩世之间(J3/K1)。大巴山与米仓山构造交接变形是在印支期碰撞造山作用基础上,燕山期陆内造山作用期间不同体系构造复合叠加的产物。

关键词: 构造交接关系, 叠加褶皱, 陆内造山作用, 米仓山, 大巴山, 陕南镇巴地区

Abstract:

Typical superimposed fold structure occurs in the Zhengba region,southern Shaanxi Province,where the Micangshan and Dabashan structures intersect with each other.The nearly EW-NEE trending fold structures in Micangshan area and the nearly SN-NNE trending closed fold structures in Dabashan area are in traverse superimposition.The superimposed folds developed in the Sishang area show that the early E-W trending folds were superimposed and deformed by the late S-N trending folds,resulting in the nearly S-N occurrence of the regional strata.These folds were developed during J3-K1.However,the folding and deformation of the Micangshan area happened in the Late Jurassic(J3),a little earlier than that of the Zhenba area(the west segment of the sou-thern Dabashan Mountain),which happened during the Late Jurassic and Early Cretaceous(J3/K1).The intersection and deformation of Dabashan and Micangshan were resulted from superimposition of different tectonic systems during the Yanshanian intracontinental orogeny on the basis of the Indosinian collision orogeny.

Key words: tectonic intersection relationship, superimposed fold, intracontinental orogeny, Micangshan, Dabashan, Zhenba area in southern Shaanxi Province

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