鄂尔多斯中-新元古代盆地构造初探  

An initial survey of the Ordos basin structure in Mesoproterozoic and Neoproterozoic

作　　者：章贵松[1] 孙六一[1] 刘刚[1] 郭玮[1] 雷鸣 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院 [2]中国石油长庆油田分公司第六采气厂

出　　处：《低渗透油气田》2015年第2期1-4,39,共5页

摘　　要：通过盆内钻井、盆缘露头资料，结合地震和重磁勘探成果，系统刻画了鄂尔多斯中-新元古代长城纪、蓟县纪、震旦纪末期盆地古构造。明确指出中-新元古代盆地构造经历了裂-坳-隆-坳4次重大构造变革．完成了从基底→长城纪陆内裂谷→蓟县纪边缘坳陷→青白口纪古陆→震旦纪边缘坳陷演变过程．具有阶段性和不可逆性的特点。认为鄂尔多斯盆地在中-新元古代并非独立的沉积-构造单元，而是某一构造单元组成部分。Through analysis of data of well-drilling within the basin and outcrops in the margins of the basin, the palaeotectonics of Ordos basin in the Mesoproterozoic （＇about tile Changcheng Period to Jixianian Period. in China） and Late Neoprnterozoic （by the end of Sinian in China） is systematically described in the paper, combined with seismic, gravity and magnetic exploration resuhs, h is clearly stated that in the Mesoproterozoic and Neoproterozoic the basin＇ s tectonics experienced four times of major tectonic reforms, which are cracking-depressing-uplifting-downwarping. The depression evolution process has been completed from the base→intra-continentai rift in the Changcheng Period → marginal depression in the Jixianian Period --~ oldland in the Qingbaikou Period→marginal depression in the Sinian Period, with staged and irreversible characteristics. The authors think that the Ordos basin was not an independent sedimentary-tectonic unit in the Mesoand Neoproterozoic, but part of a tectonic unit.

关 键 词：盆地构造 构造变革 演化过程 中新元古代 鄂尔多斯 

分 类 号：P588.1[天文地球—岩石学]