扬子东南缘北东段加里东期构造不整合特征
Unconformity characteristics of Caledonian structure in northeast segment of southeastern margin of Yangtze Block
陈秀其 1周涛发 2侯明金3
作者信息
- 1. 合肥工业大学资源与环境工程学院,安徽合肥 230009;安徽省地质调查院,安徽合肥 230001
- 2. 合肥工业大学资源与环境工程学院,安徽合肥 230009
- 3. 安徽省地质调查院,安徽合肥 230001
- 折叠
摘要
对于扬子东南缘北东段上、下古生界(加里东期)接触关系,已有研究成果存在较大分歧.文章深入研究了加里东期构造不整合分布特征及其上、下层位构造变形特征,结果发现区内泥盆系或石炭系与下伏地层之间主要呈微角度不整合至角度不整合接触,表明研究区发育加里东期褶皱;在野外调查和已有研究成果的基础上,建立了上述接触关系构造模型,以进一步揭示和论证区内平行不整合接触实为角度不整合接触关系,从而对区域构造格架的重建具有一定意义.
Abstract
There are great differences in the understanding of contact relationship between the upper and lower Paleozoic on the northeast segment of southeastern margin of Yangtze Block .In this paper , the distribution characteristics of unconformity about the Caledonian structure and the structural de-formation of the overlying and underlying strata are investigated .The contact by the micro angle to angle unconformity between the Devonian or Carboniferous strata and its underlying strata is found . The results show that Caledonian fold is widely developed in the study area .On the basis of the field investigation and the previous study ,the model of the above contact relationship is established to fur-ther reveal and demonstrate that the parallel unconformity contact is the angle unconformity contact . It is of significance to the reconstruction of the regional tectonic framework .
关键词
角度不整合/平行不整合/构造模型/加里东运动/扬子东南缘北东段Key words
angle unconformity/parallel unconformity/tectonic model/Caledonian Movement/north-east segment of southeastern margin of Yangtze Block引用本文复制引用
基金项目
国家自然科学基金重大国际(地区)合作与交流资助项目(41320104003)
中国地质调查局国土资源大调查资助项目(1212011120851)
中国地质调查局国土资源大调查资助项目(12120114039701)
出版年
2018
NETL
NSTL
维普
万方数据