| 云南腾冲火山区上部地壳三维地震速度层析成像 |
| |
| 引用本文： | 楼海,王椿镛,皇甫岗,秦嘉政.云南腾冲火山区上部地壳三维地震速度层析成像[J].地震学报,2002,24(3):243-251. |
| |
| 作者姓名： | 楼海 王椿镛 皇甫岗 秦嘉政 |
| |
| 作者单位： | 1)中国北京100081中国地震局地球物理研究所
2)中国昆明650041云南省地震局 |
| |
| 基金项目： | 国家自然科学基金 ( D0 4 0 7)，中国地震局“九五”重点项目 ( 95 -1 1 -0 1 -0 6 )，地震科学联合基金 ( 1 991 1 9)资助 |
| |
| 摘 要： | 根据1999年腾冲火山区人工地震探测资料，用层析成像方法反演了腾冲火山区上地壳三维P波速度结构．层析成像结果显示出，在腾冲火山区下方的上地壳内存在明显的P波低速区，该低速区在地下7～8km深度，可能与上地壳内的岩浆囊或部分熔融体有关．层析结果还显示出低速区主体在热海地区的东北侧．地表附近的低速区可能是构造破裂发育地区形成了有利于深部热流体上升的通道，因此，在热海形成最活跃的地热显示．
|
| 关 键 词： | 腾冲火山区 三维地震层析成像 岩浆囊 |
| 文章编号： | 0253-3782(2002)03-0243-09 |
| 修稿时间： | 2001年9月25日 |
THREE-DEMENSIONAL SEISMIC VELOCITY TOMOGRAPHY OF THE UPPER CRUST IN TENGCHONG VOLCANIC AREA, YUNNAN PROVINCE |
| |
| Lou Hai Wang Chunyong Huangfu Gang Qin Jiazheng Institute of Geophysics,China Seismological Bureau,Beijing ,China Seismological Bureau of Yunnan Province,Kunming ,China.THREE-DEMENSIONAL SEISMIC VELOCITY TOMOGRAPHY OF THE UPPER CRUST IN TENGCHONG VOLCANIC AREA, YUNNAN PROVINCE[J].Acta Seismologica Sinica,2002,24(3):243-251. |
| |
| Authors: | Lou Hai Wang Chunyong Huangfu Gang Qin Jiazheng Institute of Geophysics China Seismological Bureau Beijing China Seismological Bureau of Yunnan Province Kunming China |
| |
| Institution: | Lou Hai Wang Chunyong 1) Huangfu Gang 2) Qin Jiazheng 2) 1) Institute of Geophysics,China Seismological Bureau,Beijing 100081,China 2) Seismological Bureau of Yunnan Province,Kunming 650041,China |
| |
| Abstract: | Based on data collected by deep seismic sounding carried out in 1999, a three-dimensional P wave velocity structure is determined with tomographic inversion. The tomographic result shows that there is a P wave low velocity zone (LVZ) in the upper crust beneath the Tengchong volcanic area. The LVZ is in the depth of 7~8 km and may be a small magma chamber or a partial melting body. The result also shows that the LVZ is in the northeastern side of the Rehai hydrothermal field, which is located in another LVZ near the surface. The shallow LVZ may represent a well-developed fracture zone. The strong hydrothermal activity in Rehai area can attribute to the existence of fractures between two LVZs. These fractures are the channels for going upwards of the deep hot fluid. |
| |
| Keywords: | Tengchong volcanic area three-dimensional seismic tomography magma chamber |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地震学报》浏览原始摘要信息 |
| 点击此处可从《地震学报》下载免费的PDF全文 |
