黔西北纳雍-水城一带构造变形特征及其演化

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英文篇名：Tectonic Formation Features and Its Evolution in Nayong-Shuicheng Area of Northwest Guizhou 作者：吴开彬 ; 蒋开源 ; 黄文俊 ; 跃连红 ; 张德明 英文作者：WU Kai-bin;JIANG Kai-yuan;HUANG Wen-jun;YUE Lian-hong;ZHANG De-ming;Guizhou Academy of Geological Survey;Guizhou Research of Geologyand Geophysical prospecting devecoped and Applied Engineering Technology;Cademician Workstation,Guizhou Geological Survey; 关键词：黔西北 ; 褶皱 ; 断层 ; 燕山期 ; 构造演化 英文关键词：Northwest Guizhou;;Fold;;Fault;;Yanshan period;;Tectonic evolution 中文刊名：GZDZ 英文刊名：Guizhou Geology 机构：贵州省地质调查院贵州省地质物探开发应用工程技术研究中心贵州省地质调查院院士工作站; 出版日期：2019-06-15 出版单位：贵州地质 年：2019 期：v.36;No.139 语种：中文; 页：GZDZ201902009 页数：8 CN：02 ISSN：52-1059/P 分类号：67-74

摘要

黔西北纳雍-水城一带位于扬子板块西南缘,区内断裂和褶皱极为发育。通过详细野外地质调查,并结合沉积地层接触关系,对区内构造行迹及其组合特征、构造变形期次和构造演化进行探讨。研究表明,震旦纪末至中侏罗世纳雍-水城一带经历了多次构造事件,特别是广西构造事件和印支期构造事件,导致明显的差异剥蚀,但均未造成地层褶皱变形,地层间表现为平行不整合接触。晚侏罗世以后的燕山构造期和喜山构造期才是区内发生构造变形的重要时期。纳雍-水城一带发育的NE-SW、NW-SE及近E-W向三组构造以及在NE-SW、NW-SE向两组构造交接转换部位发育的穹窿构造、构造盆地,均为侏罗纪晚期至早白垩世时期强烈构造事件的产物。其中NE-SW向褶皱及近E-W向断层先期形成,NW-SE向褶皱后期形成,并对先期形成的NE-SW向褶皱进行叠加改造。
        The Nayong-Shuicheng area in northwestern Guizhou is located in the southwestern margin of the Yangtze plate,where faults and folds are well developed. Based on the detailed field geological survey and the contact relationship between sedimentary strata,the structural trajectory and its assemblage characteristics,tectonic deformation stages and tectonic evolution in the area are discussed. The study shows that the NayongShuicheng area experienced many tectonic events from the end of Sinian to the middle Jurassic,especially the tectonic events of Guangxi and Indosinian,which resulted in obvious differential denudation,but did not cause formation fold deformation,and the strata showed parallel unconformity contact. The Yanshanian and Himalayan tectonic periods after the Late Jurassic are the important periods of tectonic deformation in the area. The NESW,NW-SE and nearly E-W trending structures developed in the Nayong-Shuicheng area,as well as dome structures and structural basins developed at the transition sites between NE-SW and NW-SE trending structures,are the products of intense tectonic events from late Jurassic to early Cretaceous. Among them,NE-SW trending folds and near E-W trending faults were formed earlier,NW-SE trending folds were formed later,and NE-SW trending folds formed earlier were superimposed and reformed.

引文

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