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引用本文:谭捍东1 姜 枚2,3 林昌洪1 彭 淼2 吴良士3 马 欢1 王忠凯1 李晋津1 谭嘉言1. 云南腾冲火山构造区的电性结构特征及其地质意义[J]. 中国地质, 2013, 40(3): 800-805.
TAN Han-dong1, JIANG Mei2,3, LIN Chang-hong1, PENG Miao2, WU Liang-shi3, MA Huan1, WANG Zhong-kai1, LI Jin-jin1, TAN Jia-yan1. Characteristics of electrical structure of Tengchong volcano-tectonic belt in Yunnan Province[J]. Geology in China, 2013, 40(3): 800-805(in Chinese with English abstract).
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云南腾冲火山构造区的电性结构特征及其地质意义
谭捍东1 姜 枚2,3 林昌洪1 彭 淼2 吴良士3 马 欢1 王忠凯1 李晋津1 谭嘉言1
作者单位
谭捍东1 姜 枚2,3 林昌洪1 彭 淼2 吴良士3 马 欢1 王忠凯1 李晋津1 谭嘉言1 1.中国地质大学(北京)地球物理与信息技术学院, 北京 1000832.中国地质科学院地质研究所, 大陆构造与动力学国家重点实验室, 北京 1000373.中国地质科学院矿产资源研究所, 北京 100037 
摘要:
提要:为配合科学钻探选址,在云南腾冲县城以北至固东镇之间沿东西向布设了4条可控源音频大地电磁测深剖面和2条大地电磁测深剖面, 对6条剖面的电磁测深资料进行了预处理和二维反演,获得了6条剖面的电阻率模型。这些剖面具有的主要电性结构特征为:盆地地壳内存在2套低阻, 其中浅部的低阻层沿南北向稳定存在,由含水(热水)的火山岩下部、花岗岩上部与花岗砂砾岩组成, 构成了腾冲盆地的地热资源的热储层, 其主要层位在300~1500 m范围内;深部的低阻体是作为热源的岩浆囊, 位于马站—曲石乡之间的部分深12~30 km, 东西宽25 km以上。以上电性特征为研究云南腾冲火山构造区岩浆和火山活动提供了地球物理依据。
关键词:  云南腾冲  电磁法  火山构造  电性结构  热储层  岩浆囊
DOI:
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基金项目:国家深部探测技术与实验研究专项大陆科学钻探选址与钻探实验(SinoProbe-05-07)资助。
Characteristics of electrical structure of Tengchong volcano-tectonic belt in Yunnan Province
TAN Han-dong1, JIANG Mei2,3, LIN Chang-hong1, PENG Miao2, WU Liang-shi3, MA Huan1, WANG Zhong-kai1, LI Jin-jin1, TAN Jia-yan1
Abstract:
Abstract:In order to choose the scientific drilling location, the survey collected Controlled-source Audio frequency Magnetotelluric (CSAMT) data along four E-W orientation profiles and Magnetotelluric (MT) data along two E-W orientation profiles between Tengchong County and Gudong Town in Yunnan Province. The resistivity model for the six profiles were obtained by data preprocessing and 2D inversion. The electrical structure of these profiles is characterized by the existence of two low resistivity layers in the crust of the basin. The shallow layer is stably existent in NS direction with the main part distributed from 300m to 1500m in depth. It consists of the bottom of water-bearing volcanic rocks and the top of granites and granite gravel rocks that form the heat reservoir of the Tengchong basin geothermal resource. The deep layer is a magma pocket serving as heat source, with 12~30 km depth and over 25 km E-W width between Mazhan Town and Qushi Town. The above electrical characteristics provide geophysical basis for the study of magma and volcanic activity in Tenchong volcanic-tectonic belt of Yunnan Province.
Key words:  Tengchong in Yunnan  electromagnetic method  volcano-tectonic  electrical structure  heat reservoir  magma pocket