欢迎访问现代地质!

现代地质 ›› 2021, Vol. 35 ›› Issue (05): 1240-1250.DOI: 10.19657/j.geoscience.1000-8527.2020.065

• 构造地质学 • 上一篇    下一篇

长江中下游地区新华夏构造体系的“米字型”结构特征

吕古贤1(), 张宝林2, 吕承训3, 胡宝群4, 曾勇5, 郭涛1, 申玉科1, 王红才1, 马立成1, 焦建刚6, 毕珉烽7   

  1. 1.中国地质科学院地质力学研究所,北京 100081
    2.中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京 100029
    3.中国地质调查局发展研究中心,北京 100037
    4.东华理工大学 地球科学学院,江西 南昌 330013
    5.中国地质调查局南京地质调查中心,江苏 南京 210016
    6.长安大学地球科学与资源学院,陕西 西安 710054
    7.中国地质科学院矿产地质研究所,北京 100037
  • 收稿日期:2020-03-20 修回日期:2020-07-24 出版日期:2021-10-10 发布日期:2021-11-04
  • 作者简介:吕古贤,男,研究员,博士生导师, 1949年出生,构造地质学专业,主要从事地质力学、区域成矿、矿产预测及矿田地质学和构造物理化学方面的研究。Email: lvguxian@126.cm
  • 基金资助:
    山东黄金矿业(玲珑)有限公司科研项目(LLYY-2019-001);中国地质调查局项目(121201081305);国土资源部科技发展计划项目(2002201);国家计委科技找矿项目(GJ9471110);国家科委基础研究特别支持项目(94-83);中国地质调查局项目(20023046);国家攀登项目(G1999043214);国家攀登项目(95-39(预)-6-3)

Characteristics of Double-cross Structure in Neo-Cathaysian Structural System in the Middle-Lower Yangtze River Valley Region

LÜ Guxian1(), ZHANG Baolin2, LÜ Chengxun3, HU Baoqun4, ZENG Yong5, GUO Tao1, SHEN Yuke1, WANG Hongcai1, MA Licheng1, JIAO Jiangang6, BI Minfeng7   

  1. 1. Institute of Geomechanics, Chinese Academy of Geological Sciences,Beijing 100081, China
    2. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences,Beijing 100029, China
    3. Geological Survey Center, China Geological Survey, Beijing 100037, China
    4. School of Earth Sciences, East China University of Technology, Nanchang,Jiangxi 330013, China
    5. Nanjing Center, China Geological Survey, Nanjing, Jiangsu 210016, China
    6. School of Earth Sciences and Resources, Chang’an University, Xi’an,Shaanxi 710054, China
    7. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
  • Received:2020-03-20 Revised:2020-07-24 Online:2021-10-10 Published:2021-11-04

摘要:

构造体系由强变形构造带和弱变形地域共同构成,这些构造带和变形带可以用结构面的形式表达。构造体系结构面的分布分析,更加适用于变形规律研究,便于追索构造应力场及其演化。以长江中下游地质结构与导矿-控矿要素研究为基础,总结了新华夏构造体系结构面的“米字型”分布特征。新华夏系“米字型”构造,由NNE 25°方向挤压断裂和褶皱带、NNW 345°方向(大义山式)张扭断裂、NEE 75°方向(泰山式)压扭构造和NWW 300°方向(长江式)的横张构造组成。其演化分先后三个阶段;NNW 345°方向—NEE 75°方向的共轭剪切构造阶段、NNE 25°方向挤压构造阶段和NWW 300°方向的张性剪切构造阶段。新华夏构造体系的“米字型”构造样式的识别,为研究构造体系的应力-应变成因、探讨构造体系的形成演化以及浅部构造和深部构造相关性研究提供了重要的地质构造基础。在其它类型的构造体系中,结构面也具有“米字型”分布特征。

关键词: 长江中下游地区, 新华夏构造体系, 结构面的“米字型”分布, 剪-压-张构造演化

Abstract:

The tectonic system is composed of strongly-deformed structural belts and weakly-deformed region. These structural belts and blocks can be expressed in the form of structural planes. Structural plane analysis of the structural system is suitable for the study on the deformation rules, and it facilitates the tracing of structural stress field and evolution. Based on the study of the geological structures and the ore-forming/-controlling elements in the Middle-Lower Yangtze River Valley region, we summarized the distribution features of double-cross planes of the Neo-Cathaysian structural system. The double-cross structures of the Neo-Cathaysian structural system is composed of NNE-trending (25°) compressional fracture and fold belt, NNW-trending (345°, Dayishan-type) tension-torsional fractures, NEE-trending (75°, Taishan-type) compression-torsional structures, and NWW-trending (300°, Yangtze River-type) transverse extension structures. It contains three evolution stages: (1) the NNW 345° to NEE 75°-trending conjugate shear stage, (2) the NNE 25°-trending extrusion stage, and (3) the WWN 300°-trending tensile shear stage. Identification of the double-cross structural style of the Neo-Cathaysian structural system provides an important geological structural basis for the stress-strain genesis study, for the structural system formation and evolution, and for correlating shallow and deep structures. In addition, the structural planes have double-cross distribution features in other types of structural systems.

Key words: Middle-Lower Yangtze River Valley, Neo-Cathaysian structural system, double-cross structure surface, shear-compression-tension tectonic evolution

中图分类号: