| 云南腾冲火山构造区马站—固东岩浆囊的地球物理模式 |
| |
| 关键词:Tengchong volcanic structure geothermic reservoir magma chamber |
| 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综合研究项目(编号: SinoProbe-05-07) |
|
| 摘要点击次数: 3689 |
| 全文下载次数: 6176 |
| 摘要: |
| Geophysical Mode of Mazhan-Gudong Magma Chamber in Tengchong Volcano-tectonic Area |
| Tengchong volcano-tectonic area located in southeast Tibetan plateau has experienced frequent magmatism. In order to support selecting site and pilot holes for continental scientific drilling, the authors conducted geophysical investigations in the area from Mazhan in Tengchong basin to Gudong and Qushi by such means as Magnetotelluric Survey (MT), Controlled Source Audio-frequency Magnetotellurics (CSAMT), seismic reflection and gravity and magnetic exploration. Two low-velocity and resistive layers were recognized in the crust within the basin. The resistive layer in the superficial part consists of hydrous (hydrothermal) volcanic rock, granite and glutenite, forming a geothermal reservoir in the basin 300–1500 m in depth. The deep-seated conductive body is a magma pocket (heat reservoir), lying 12–30 km in depth in Mazhan, Gudong and Qushi; its EW-trending width exceeds 25 km and may be linked to magma pockets in northern Tengchong. The craters of Xiaokongshan, Dakongshan and Heikongshan can be identified by typical gravity and magnetic characteristics, and the negative gravity anomaly resulting from the eruption has especially obvious mirror image relationship with volcanic landform. |
| JIANG Mei,TAN Han-dong,ZHANG Yu-wen,PENG Miao,LI Qing-qing,ZHANG Li-shu,XU Le-hong,WANG Wei.2012.Geophysical Mode of Mazhan-Gudong Magma Chamber in Tengchong Volcano-tectonic Area[J].Acta Geoscientica Sinica,33(5):731-739. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|