大别造山带中上地壳变形特征——皖中张八岭地区印支—燕山早期构造变形研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家重点基础研究发展规划“973”项目(G2000046705)和国土资源部重大科技项目资助。


Deformation features of the mid-upper crust of the Dabie orogenic belt—a case study of the Indosinian-early Yanshanian tectonic deformation in the Zhangbaling area
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    提要:张八岭构造带是大别造山带的一部分,是造山带中上地壳出露地区。通过运用构造-地层学的理论和方法,以及对张八岭地区1∶5万地质填图资料的分析和典型地区的构造解剖,认为:区内张八岭(岩)群与南华系—震旦系及其以上地层之间不存在强烈的构造运动界面,其作为大别造山带的组成部分发生了强烈的变形作用;印支—燕山早期区内主要存在3期构造变形:早期为一系列呈NWW、近EW向的紧闭同斜褶皱,中期以韧性剪切带发育为特征,晚期以NW向SE的逆冲推覆作用伴生NNE向为主的宽缓褶皱。三期变形相互叠加,形成区内基本构造格架。伴随着扬子地块向华北地块的俯冲与碰撞,中上部地壳发生褶皱、逆冲推覆(前缘滑覆)作用等, 三期变形为一递进变形过程。

    Abstract:

    Abstract: The Zhangbaling tectonic belt is a part of the Dabie orogenic belt and an outcrop area of the mid-upper crust of the belt. By using the combined tectonic and stratigraphic method to analyze the l∶50000 geological mapping data of the Zhangbaling area and make structural analysis of the typical cases, the following new ideas have been got: there is no boundary of strong tectonic movement between the Zhangbaling Group-complex (Pt2~3) and the Nanhuaan-Ordovician or strata above them, and as a component part of the Dabie orogenic belt, the group-complex underwent strong deformation; in the Indosinian-early Yanshanian there mainly occurred three phases of tectonic deformation, i.e. a series of WNW-and nearly E-W-trending tight congruous folds in the early stage, a ductile shear zone in the middle stage, and the mainly NNE-trending, broad folds accompanied by SE-vergent overthrusting in the late stage. The superimposition of the three phases of deformation formed the basic tectonic framework of the area. Folding and overthrusting (front sliding) took place in the mid-upper crust (include sedimentary cover) concomitantly with subduction of the Yangtze block beneath the North China block and their collision. The three phases of deformation represent a process of progressive deformation.

    参考文献
    相似文献
    引证文献
引用本文

侯明金 吴跃东 汤加富. 大别造山带中上地壳变形特征——皖中张八岭地区印支—燕山早期构造变形研究[J]. 中国地质, 2004, 31(2): 123-130.
HOU Ming-jin, WU Yue-dong, TANG Jia-fu. Deformation features of the mid-upper crust of the Dabie orogenic belt—a case study of the Indosinian-early Yanshanian tectonic deformation in the Zhangbaling area[J]. Geology in China, 2004, 31(2): 123-130(in Chinese with English abstract).

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2013-04-12
  • 出版日期:
亮点文章推荐
古人云:工欲善其事,必先利其器。我国新一轮战略找矿行动已全面启动。用什么方法、什么手段实现增储上产是面临的突出问题。本刊登载了几篇基于新技术、新方法实现找矿突破的实例,供大家参阅,助力新一轮战略找矿目标的实现。
基于随机森林算法的找矿预测——以冈底斯成矿带西段斑岩—浅成低温热液型铜多金属矿为例. 欧阳渊等,2023, 50(2):303-330.
基于重磁资料在山东齐河—禹城探获矽卡岩型富铁矿:对超深覆盖区找矿的启示. 王润生等,2023, 50(2):331-346.
自然伽马曲线重构波阻抗反演在勘探含铀有利成矿砂体中的尝试. 梁建刚等,2023, 50(2):347-358.
宽频大地电磁法寻找“界面型”隐伏金矿床:以黔西南戈塘地区深部找矿为例. 张伟等,2023, 50(2):359-375.
页岩气基础地质调查钻井技术研究进展及展望. 赵洪波等,2023, 50(2):376-394.
关闭