【摘要】 为查明黄沙坪-廖家湾矿集区深部地球物理异常与成矿的关系,以及地下精细结构,本文采用人工地震、AMT、高精度磁测、综合物性研究等探测技术,结合该区的地质资料和前人的物性成果,通过磁、电、震联合反演,探讨了廖家湾成矿地球物理异常的深部地质成因;采用深、浅不同深度的地震反演速度剖面所提供的相对精细、精确的地下介质几何结构与速度变化特征,约束磁性与电性异常的解释,获得了较好的磁-震、电-震的一致性.研究表明:高磁性的矽卡岩与地面和航空磁异常密切相关,成矿地球物理异常与区内多金属矿(化)关系密切,是由深部隐伏钨锡矿(化)矽卡岩体引起.更多还原

【Abstract】 In order to identify the deep elaborate structure and explore the relation-ship between geophysical anomalies and mineralization in Liaojiawan deposits,a comprehensive exploration was employed,including seismic,AMT,high-precision magnetic survey and physical rock measurement.Under the help of history geological information,the deep geologic origin of Liaojiawan geophysical anomalies was analyzed by means of geophysical joint inversion.Controlled by regional geology,a relatively reasonable interpretation of magnetic and electromagnetic data was deduced at the basis of seismic velocity inversion,since more deep and accurate information can be provided by seismic exploration.The case study of Liaojiawan showed that Liao’s geophysical anomalies are closely related to poly-metallic ore deposit,and may be caused by the deep and hidden skarn ores containing tungsten tin.Especially,there is a good relation-ship between the high magnetic subsurface skarn body with the air or surface magnetic anomaly.更多还原