SEISMOLOGY AND GEOLOGY ›› 2008, Vol. 30 ›› Issue (1): 132-143.

• Active structures and neotectonics • Previous Articles     Next Articles

CRYSTALLINE BASEMENT FAULTS IN JUNGGAR BASIN DETERMINED BY GRAVITY AND GEOMAGNETISM

ZHAO Jun-meng1,3, LU Zao-xun2, YAO Chang-li4, LI Yi-shi5, LIU Zhan-po3   

  1. 1. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China;
    2. Earthquake Administration of Liaoning Province, Shenyang 110031, China;
    3. Institute of Geology, China Earthquake Administration, Beijing 100029, China;
    4. China University of Geosciences(Beijing), Beijing 100083, China;
    5. China Earthquake Administration, Beijing 100036, China
  • Received:2008-01-27 Revised:2008-03-17 Online:2008-03-19 Published:2009-08-24

准噶尔盆地基底断裂的重磁学研究

赵俊猛1,3, 卢造勋2, 姚长利4, 黎益仕5, 刘占坡3   

  1. 1. 中国科学院青藏高原研究所, 北京, 100085;
    2. 辽宁省地震局, 沈阳, 110031;
    3. 中国地震局地质研究所, 北京, 100029;
    4. 中国地质大学(北京), 北京 100083;
    5. 中国地震局, 北京, 100036
  • 作者简介:赵俊猛,男,1957年生,1998年毕业于中国地震局地质研究所,固体地球物理专业,获理学博士学位,研究员,现主要研究方向为青藏高原壳幔结构与动力学过程,电话:010-62849699,E-mail:zhaojm@itpcas.ac.cn.
  • 基金资助:
    中国科学院百人计划"择优支持项目、国家重点基础研究发展计划项目(2006CB202300)、科学院知识创新方向性项目(kzcx3sw143)、国家自然科学基金(40652002)与新疆油田公司科技项目共同资助.

Abstract: Based on the 1:200000 gravitational and geomagnetic data in Junggar Basin and its adjacent regions,47 faults in Junggar Basin were determined by means of frequency domain transform in gravity and geomagnetism fields,regular filter,upward continuation of Bouguer anomaly,derivative,polarization of geomagnetic anomaly and tendency analysis. These faults can be divided into three groups: 6 of the first class,6 of the second class and 35 of the third class. The faults F1 in SN direction and F6 in EW direction were determined especially by detailed data processing,combined with sediment features of the cover layers. The two main faults divide the basement of the Junggar Basin into four quadrants,which provide an important evidence for developing the new basement structure frame.

Key words: Junggar Basin, gravity and geomagnetic anomalies, fault, structure frame of the crystalline basement

摘要: 利用准噶尔盆地及周边地区1/20万重力、航磁数据,使用重力、航磁位场频率域转换、正则化滤波、布格重力异常向上延拓、求导、磁异常化极以及趋势分析方法,在准噶尔盆地内部确定了47条主要断裂,并将其分为3个等级,其中一级断裂6条,二级断裂6条,三级断裂35条。尤其是通过详细的资料处理,并结合盆地盖层沉积特点确定了基底SN,EW向断裂F1,F6的存在。这2组主要断裂将准噶尔盆地的基底划分为4个象限,是新的基底构造格架建立的重要依据之一。

关键词: 准噶尔盆地, 重磁异常, 断裂, 基底构造格架

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