基于重磁资料研究贵州省深部构造特征

doi:10.6038/pg2019CC0310

地球物理学进展 ›› 2019, Vol. 34 ›› Issue (5): 1785-1793.doi: 10.6038/pg2019CC0310

• 固体地球物理及空间物理学（大气、行星、地球动力学、重磁电及地震学、地热学） • 上一篇下一篇

基于重磁资料研究贵州省深部构造特征

屈念念^1,^2,³,李家斌^2,^3,^*(),张西君^2,³,刘俊^2,³

^1. 中国地质大学(北京),北京 100083
^2. 贵州省地质调查院,贵阳 550081
^3. 贵州省地质物探开发应用工程技术研究中心,贵阳 550081;

收稿日期:2018-11-19 修回日期:2019-07-25 出版日期:2019-10-28 发布日期:2019-10-28
通讯作者: 李家斌 E-mail:365125121@qq.com
作者简介:屈念念,女,1986年生,在职博士,高级工程师,地球探测与信息技术专业,主要从事重磁电综合地球物理方法研究.(E-mail: 348445054@qq.com)
基金资助:
贵州省地质矿产勘查开发局地质科学研究项目(黔地矿科合2016(32));贵州省地质矿产勘查开发局地质科学研究项目(黔地矿科合2016(33));贵州省科技计划项目(黔科合平台人才【2018】5626;黔科合平台人才【2016】5401)联合资助.

Study of deep structural feature in Guizhou based on gravity and magnetic data

QU Nian-nian^1,^2,³,LI Jia-bin^2,^3,^*(),ZHANG Xi-jun^2,³,LIU Jun^2,³

^1. China University of Geosciences(Beijing),Beijing 100083, China
^2. Guizhou Geological Survey,Guiyang 550081, China
^3. Guizhou Engineering Research Center for Geologic-Geophysical Exploration Development and Application,Guiyang 550081, China;

Received:2018-11-19 Revised:2019-07-25 Online:2019-10-28 Published:2019-10-28
Contact: Jia-bin LI E-mail:365125121@qq.com

摘要/Abstract

摘要：

贵州省在大地构造位置上属于羌塘—扬子—华南板块下的扬子陆块,受不同构造旋回期的发展演化控制,早期地质构造被掩盖,而研究深部构造有利于构造单元划分、成矿作用等研究.本文利用区域重磁资料,结合其他地质资料,利用优选向上延拓分离不同尺度重磁异常,并对不同尺度重磁异常进行归一化总水平导数垂向导数处理,提取线性构造信息,分析区内主要断裂构造特征,进行定性分析;根据分离出的大尺度重磁异常反演研究区莫霍面、居里面起伏特征,莫霍面起伏介于34~46 km之间,总体上具有西高东低的特征;居里面深度介于22~28.5 km之间,西部以坳陷区为主,东部以隆起区为主,以区内两条深大断裂为界,深部构造具有南北分带、东西分块的特征,反映出贵州省上扬子地块与江南造山带两个三级构造分区的深部构造特征差异.

关键词: 重磁异常, 优选向上延拓, 线性构造, 莫霍面, 居里面

Abstract:

Guizhou locates in Yangtze block of Qiangtang-Yangtze-South China plates, and its early geological structure was concealed due to the development of different tectonic cycles, and the study of deep structure is conducive to the research of tectonic unit division and mineralization. Based on gravity and magnetic data, combing with other geology data, this paper utilizes preferential upward continuation to separate different-scale gravity and magnetic anomaly, and calculates the normalized vertical derivative of the total horizontal derivative of different-scale gravity and magnetic anomaly to extract linear structure information, then analyzes the main faults structure feature and develops qualitative analysis. Utilizing the separated large-scale anomaly to invert the depth of Moho and Curie, the result shows that the depth of Moho ranges from 34 km to 46 km with high value in the western and low value in the eastern; the depth of Curie ranges from 22 km to 28.5 km with depression areas in the western and uplift area in the eastern, and taking two deep faults as the boundary, the deep structure of Guizhou has the feature of zones distributed along north-south and blocks distributed along east-west, and also reflects the deep structure feature differences between the upper Yangtze Block and Jiangnanorogenic zone.

Key words: Gravity and magnetic anomaly, Preferential upward continuation, Linear structure, Moho, Curie

中图分类号:

P541
P631

屈念念, 李家斌, 张西君, 刘俊. 2019. 基于重磁资料研究贵州省深部构造特征. 地球物理学进展, 34(5): 1785-1793. doi: 10.6038/pg2019CC0310.

QU Nian-nian, LI Jia-bin, ZHANG Xi-jun, LIU Jun. 2019. Study of deep structural feature in Guizhou based on gravity and magnetic data. Progress in Geophysics. 34(5): 1785-1793. doi: 10.6038/pg2019CC0310.

图/表 4

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基于重磁资料研究贵州省深部构造特征

Study of deep structural feature in Guizhou based on gravity and magnetic data

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