腾冲火山多地球物理参数模型  

A multi-geophysical parameter model in Tengchong volcanic area

作　　者：李俊秀 叶涛 张慧茜 黄清华[1,3] LI JunXiu;YE Tao;ZHANG HuiQian;HUANG QingHua(Department of Geophysics,School of Earth and Space Sciences,Peking University,Beijing 100871,China;National Institute of Natural Hazards,Ministry of Emergency Management of China,Beijing 100085,China;Hebei Hongshan Geophysical National Observation and Research Station,Peking University,Beijing 100871,China)

机构地区：[1]北京大学地球与空间科学学院地球物理学系,北京100871 [2]应急管理部国家自然灾害防治研究院,北京100085 [3]河北红山地球物理国家野外科学观测研究站,北京大学,北京100871

出　　处：《地球物理学报》2021年第10期3657-3668,共12页Chinese Journal of Geophysics

基　　金：国家自然科学基金委员会创新研究群体(42021003)资助.

摘　　要：腾冲火山区是中国最年轻的板内火山之一,岩浆活动频繁以及高温地热异常使其受到广泛关注.以往的地球物理探测结果显示腾冲火山区下方存在地壳岩浆囊,但其深部几何形态和分布一直存在争议.本文基于腾冲火山地区的大地电磁测深结果,并结合相关地质与地球物理资料,提出腾冲火山岩石圈尺度的多地球物理参数模型.我们的模型显示在腾冲火山区中下地壳内存在三个岩浆囊;腾冲火山区岩石圈上地幔可能存在岩浆囊,但需要长周期大地电磁测深数据进一步的验证.Tengchong volcano is one of the youngest intraplate volcanoes in China.Its frequent magmatic activity and abnormally high temperature geothermal have aroused widespread concern.Previous geophysical survey results show that there are crustal magma chambers under the Tengchong volcanic area.However,its deep geometric structure and distribution have always been controversial.In this paper,we propose a lithospheric-scale multi-geophysical parameter model of Tengchong volcano,which is based on the magnetotelluric sounding results of the Tengchong volcanic area and combines relevant geological and geophysical results.Our model shows that there are three magma chambers in the middle and lower crust of the Tengchong volcanic area;there may be magma chambers in the upper mantle of the lithosphere scale,but long-period magnetotelluric sounding data are needed for further verification.

关 键 词：腾冲火山 岩浆囊 大地电磁测深探测 深部电性结构 

分 类 号：P319[天文地球—固体地球物理学]