西藏洞错盆地大地电磁测深电性特征  

ANALYSIS OF ELECTRICAL STRUCTURE FEATURE BENEATH THE DONGCUO BASIN IN TIBETAN PLATEAU BASED ON RESULT OF MAGNETOTELLURIC SOUNDING DETECTION

作　　者：卢景奇[1] 何梅兴[1] 方慧[1] 叶益信[2] 钟清[1] 高宝屯[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]东华理工大学核工程技术学院地球物理系,江西抚州344000

出　　处：《物探与化探》2010年第6期787-790,794,共5页Geophysical and Geochemical Exploration

基　　金：国家油气专项(2009GYXQ01)

摘　　要：介绍了大地电磁测深在西藏洞错盆地的应用,详细分析了西藏洞错盆地的电性结构特征,分析表明：盆地电性剖面分块明显,沿剖面可以分为4个电性区域,盆地沉积厚度有24 km厚,基底界面呈2个凹陷和1个隆起特征,南北两端存在2条深大断裂,控制着盆地形态,推测盆地南北两端存在推覆现象,推覆断层的上盘向盆地中心方向运动。The result of magnetotelluric sounding dectection on the profile along Dongcuo basin in Tibetan Plateau shows that the area is divided into four electrical zones,The thickness of the sendiment of the basin is 24 km.The surface of the basement presents two depressions and one dome.The conformation is controlled by two overthrusts through the profile.We conclude overthrusts exist at two sides of the basin,and they move towards central part of the basin.

关 键 词：大地电磁测深 洞错盆地 班公湖—怒江 缝合带 盆地基底 

分 类 号：P631[天文地球—地质矿产勘探]