欢迎访问现代地质!

现代地质 ›› 2019, Vol. 33 ›› Issue (01): 25-35.DOI: 10.19657/j.geoscience.1000-8527.2019.01.03

• 构造地质学与地层学 • 上一篇    下一篇

新疆南阿尔金木纳布拉克构造混杂岩带物质组成及变形特征

赵子贤1,2(), 柳长峰1(), 赫英福3, 叶宝莹1, 许鑫1,4, 霍东亮4   

  1. 1.中国地质大学(北京) 地球科学与资源学院,北京 100083
    2.中国地质科学院 地质力学研究所,北京 100081
    3.中国石油东方地球物理公司研究院 库尔勒分院,新疆 库尔勒 841001
    4.中国人民武装警察部队 黄金第八支队,新疆 乌鲁木齐 830000
  • 收稿日期:2018-01-21 修回日期:2018-10-12 出版日期:2019-02-26 发布日期:2019-02-28
  • 通讯作者: 柳长峰
  • 作者简介:柳长峰,男,副研究员,1982年出生,构造地质学专业,主要从事区域地质学研究。Email:liuchangfeng@cugb.edu.cn
    赵子贤,男,博士研究生,1991年出生,构造地质学专业,主要从事构造地质学研究。Email:zhaozixian1991@qq.com
  • 基金资助:
    中国地质调查局项目“新疆且末县阿克苏河一带(J45E015010);中国地质调查局项目“新疆且末县阿克苏河一带(J45E016009);中国地质调查局项目“新疆且末县阿克苏河一带(J45E016010);1∶5万区域地质矿产调查”(DD2016007907);地质调查专题项目“新疆且末县阿克苏河一带构造变形特征及动力学机制研究”;“新疆且末县甘泉河一带遥感地质解译”

Composition and Deformation Characteristics of the Munabulake Tectonic Mélange Belt in South Altyn Tagh, Xinjiang

ZHAO Zixian1,2(), LIU Changfeng1(), HE Yingfu3, YE Baoying1, XU Xin1,4, HUO Dongliang4   

  1. 1. School of Earth Science and Resources,China University of Geosciences,Beijing 100083,China
    2. Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China
    3. Korla Branch, Research Institute of BGP Inc.,CNPC,Korla,Xinjiang 841001,China
    4. No.8 Gold Geological Party of Chinese People’s Armed Police Force,Urumqi,Xinjiang 830000,China
  • Received:2018-01-21 Revised:2018-10-12 Online:2019-02-26 Published:2019-02-28
  • Contact: LIU Changfeng

摘要:

木纳布拉克构造混杂岩带位于南阿尔金与东昆仑衔接部位,是古阿尔金洋岩石圈板块由南向北阶段性俯冲的产物,为南阿尔金蛇绿岩带的重要组成部分。通过1∶10 000大比例尺填图和剖面测量,结合显微尺度的构造解析,对该构造混杂岩带的物质组成和变形特征进行研究,将与构造混杂岩带有关的物质组成划分为弱变形的“岩块”与强变形的“基质”两类,并从中识别出9种不同岩石组合的岩块及2种不同类型的基质。在对“岩块”和“基质”构造几何学和运动学特征研究的基础上,重点分析了地质体的构造变形截切关系及组合特征,在构造混杂岩带中识别出6期变形作用,建立了相对构造变形序列,为木纳布拉克构造混杂岩带演化提供了新的构造证据。

关键词: 阿尔金, 木纳布拉克, 构造混杂岩带, 构造解析, 变形序列

Abstract:

The Munabulake tectonic mélange is located between the South Altyn Tagh and East Kunlun. The mélange was formed during the north-dipping subduction of the Altyn Ocean, and is an important part of the South Altyn Tagh ophiolite belt. With 1∶10k mapping and cross-section measuring, we reveal the compositions and deformation features of the mélange, and divide the compositions into two types, i.e.strongly-deformed matrix and weakly-deformed blocks. Under the microscope, microstructural observation has further identified nine types of blocks and two types of matrix. Based on the geometry and kinematics of the matrix and blocks, the crosscutting relationship and tectonic association of the various geological bodies have been analyzed. As a result, six deformation phases have been recognized and the deformation history of the tectonic mélange has been established, which provides new insights for the tectonic evolution of South Altyn Tagh.

Key words: Altyn Tagh, Munabulake, tectonic mélange, structural analysis, deformation sequence

中图分类号: