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钦杭何在?来自综合地球物理探测的认识
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  • 英文篇名:Where is Qinzhou-Hangzhou juncture belt? Evidence from integrated geophysical exploration
  • 作者:严加永 ; 吕庆田 ; 罗凡 ; 陈安国 ; 叶高峰 ; 张永谦 ; 张昆 ; 赵金花 ; 张冲 ; 刘振东 ; 刘彦
  • 英文作者:YAN Jiayong;Lü Qintian;LUO Fan;CHEN Anguo;YE Gaofeng;ZHANG Yongqian;ZHANG Kun;ZHAO Jinhua;ZHANG Chong;LIU Zhendong;LIU Yan;Chinese Academy of Geological Sciences;China Deep Exploration Center,China Geological Survey& Chinese Academy of Geological Sciences;School of Geophysics and Measurement-control Technology, East China Institute of Technology;Geological Survey of Anhui Province;School of Geophysics and Information Technology, China University of Geosciences;
  • 关键词:钦杭结合带 ; 卫星重磁 ; 多尺度边缘检测 ; 大地电磁 ; 宽频地震 ; 深部地质调查 ; 深部资源工程
  • 英文关键词:Qinzhou-Hangzhou junction belt;;satellite gravity and magnetism;;multiscale edge detection;;magnetotelluric sounding;;seismic tomography;;deep geological survey;;deep resources engineering
  • 中文刊名:中国地质
  • 英文刊名:Geology in China
  • 机构:中国地质科学院;中国地质调查局-中国地质科学院地球深部探测中心;东华理工大学;安徽省地质调查院;中国地质大学(北京);
  • 出版日期:2019-08-15
  • 出版单位:中国地质
  • 年:2019
  • 期:04
  • 基金:中国地质调查局项目(DD20160082,DD20190012);; 国家重点研发计划专项课题(2016YFC0600201);; 自然基金项目(41574133,41630320)联合资助~~
  • 语种:中文;
  • 页:24-37
  • 页数:14
  • CN:11-1167/P
  • ISSN:1000-3657
  • 分类号:P631;P612
摘要
扬子古板块与华夏古板块的结合带(简称钦杭结合带)是中国东南部一条最重要的构造岩浆成矿带,其西段的位置和边界的划分方法,尚存在较大的争议。本文以大尺度卫星重磁资料为主,结合区域电性和地震资料的综合处理和分析,对钦杭结合带的边界进行了识别和厘定。研究认为,钦杭结合带是江南造山带的南部边界,结合带南界为宁波—金华—上饶南—赣州北—郴州—北海东,北界为上海—湖州—鹰潭—临川—萍乡—衡阳—永州—桂林—梧州—钦州。在结合带两侧,无论是重力场还是磁力场都具有明显不同的特征,反映了扬子和华夏板块不同的物质组成和基底特征。钦杭结合带内地球物理场也存在局部差异,揭示了结合带经过多期次岩浆活动,在不同地段形成了不同组合的金属矿床和别具特色的钦杭成矿带。
        The suture zone between the Yangtze Paleoplate and the Cathaysia Paleoplate(called Qin-Hang junction belt) is one of the most important tectonic-magmatic-metallogenic belts in southeastern China. There is still considerable controversy over the method of dividing the location and boundary of the western section of the Qin-Hang junction belt. In order to identify and determine the boundaries of the Qin-Hang junction belt, the authors employed the large-scale satellite gravity and magnetic data in combination with the integrated processing and analysis of regional magnetotelluric and broadband seismic data. The comprehensive evaluation shows that the Qin-Hang junction belt is the southern boundary of the Jiangnan orogenic belt. The authors hold that the border is Ningbo-Jinhua-Shangrao-Ganzhou-Chenzhou-Beihai in the south and Shanghai-Huzhou-Yingtan-LinchuanPingxiang-Hengyang-Yongzhou-Guilin-Wuzhou-Qinzhou in the north. On both sides of the joint belt, both the gravity field and the magnetic field have distinct characteristics, indicating the different material compositions and basements between the Yangtze and Cathaysia plates. There are also local differences in the geophysical fields of the Qin-Hang junction belt, suggesting that the tectonic belt has undergone multiple stage magmatism and formed different combinations of metal deposits in different sections,forming a unique metallogenic belt, i.e., the Qin-Hang metallogenic belt.
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