基于重磁异常特征对罗布莎地区隐伏岩体研究  

Study on concealed pluton in the Luobusha area based on gravity and magnetic anomalies

作　　者：路利春 张冲 周明霞 LU Lichun;ZHANG Chong;ZHOU Mingxia(Research Center of Gravity Exploration Comprehensive,the No.2 Comprehensive Geophysical Prospecting Brigadeof Shaanxi Geological Mining Co.,Ltd.,GEC,Xi＇an 710016,China;SinoProbe Center-China Deep Exploration Center,Chinese Academy of Geological Science,Beijing 100037,China)

机构地区：[1]陕西地矿第二综合物探大队有限公司重力探测综合研究中心,陕西西安710016 [2]中国地质科学院地球深部探测中心,北京100037

出　　处：《矿产与地质》2018年第4期710-721,共12页Mineral Resources and Geology

基　　金：中国地质调查局成都地调中心"冈底斯成矿带地质矿产调查"(编号:1212011221069);中国地质科学院基本科研业务费项目"深部探测综合方法技术预研究"(编号:JYYWF20180101)共同资助

摘　　要：通过对罗布莎地区重磁场特征的研究,分析该地区隐伏岩体的形成时代及空间分布特征,同时解决矿产勘探中遇到的问题。在总结前人成果的基础上,依据实测重力、磁测数据资料,结合不同的数据处理方式推断出罗布莎地区的隐伏岩体并作解释,预测多处隐伏岩体成矿远景区块。选取重点岩体成矿区重磁异常剖面进行2.5D反演拟合解释,总结了罗布莎地区重磁异常与隐伏岩体特征的相关关系,为综合地球物理找矿在该地区的应用提供具有超价值意义基础资料。We analyzed the formation age and spatial distribution characteristics of the concealed pluton in this area by studying the gravity and magnetic field characteristics of the Luobusha region, and the problems encountered in mineral exploration were solved. On the basis of summarizing previous achievements and combining with different data processing methods, we inferred the concealed rock body in the Luobusha region and explained it based on the measured gravity and magnetic data, and we predicted some metallogenic prospects of the concealed rock body. The authors selected the key metallogenic areas of rock body to perform the 2.5D inversion and fitting interpretation of the gravity and magnetic anomaly profile, and summarized the correlation between gravity and magnetic anomalies and the concealed rock features in the Luobusha area. This provided the super-valued basic materials to the application of the integrated geophysical prospecting in this area.

关 键 词：重磁异常 物性特征 隐伏岩体 重磁反演 异常解释 

分 类 号：P631.2[天文地球—地质矿产勘探]