遥感及综合物探方法用于山东招远南部隐伏成矿侵入体的空间定位  

Application of Remote Sensing and Comprehensive Geophysical Methods in Spatial Localization of Hidden Metallogenic Intrusions in South Zhaoyuan,Shandong Province

作　　者：高帅[1,2] 曾庆栋 于昌明[1] 邢宝山[1,2] 荆林海[3] 叶杰 范宏瑞[1] 杨奎锋[1] 

机构地区：[1]中国科学院矿产资源研究重点实验室中国科学院地质与地球物理研究所,北京100029 [2]中国科学院大学,北京100049 [3]中国科学院对地观测与数字地球科学中心,北京100094

出　　处：《黄金科学技术》2017年第5期1-10,共10页Gold Science and Technology

基　　金：山东黄金集团有限公司项目"胶东金矿集区超深部综合地质研究与资源预测";中国地质调查局老矿山深部和外围找矿项目"山东省招远南部金矿找矿预测研究"(编号:12120114032301)联合资助

摘　　要：胶东是我国最重要且规模最大的金矿集中区,近年研究表明金矿与克拉通破坏密切相关。胶西北地区的成矿成岩年龄初步显示金成矿地质体为郭家岭岩体。招远南部的大尹格庄和夏甸金矿的成矿年龄表明了金矿床与郭家岭岩体的直接关系,但该区并未发现郭家岭岩体的出露。通过遥感解译获得了区域线性和环形构造,圈定出隐伏岩体赋存的可能位置,并利用航空磁法、Eh-4连续电阻率成像系统和CG-5相对重力仪进行了综合勘探。测量结果显示,研究区郭家岭岩体磁异常不明显,以中高等电阻率(1 000~3 000Ω·m)、低相对重力异常(<8 mGal)的隐伏岩枝状侵入,埋藏深度约为1 km。与成矿相关的蚀变破碎带表现为低电阻率(0~1 000Ω·m)的电性体,与其他地质体区分较明显。多种地球物理勘查方法的联合运用,对定位隐伏侵入体和识别蚀变破碎带具有很好的效果。Jiaodong Peninsula is the most important and largest concentration region of gold deposits in China. Recent studies show that gold deposits in Jiaodong area are closely related to craton destruction in the North China.Metallogenic and diagenetic age initially suggested that Guojialing granite is the geological body of gold mineralization in northwest Jiaodong area.Despite the mineralization age of Dayingezhuang and Xiadian gold deposit certify a directly relationgship to the early Cretaceous Guojialing granite,there is no emersion of Guojialing granite in south Zhaoyuan.Linear and annular structures are obtained by remote sensing interpretation, and the possible location of concealed rock mass is delineated by comprehensive exploration using aeromagnetic method,Eh-4 coutinuous resistivity imaging system and CG-5 relative gravimeter.The measurement results indicate that Guojialing granite magnetic anomaly is not obvious,it invades in concealed rock dendritic with medium-high resistivity（ 1 000-3 000Ω·m） and lower relative gravity anomaly（〈8 mGal） ,and the buried depth is about 1 km.The altered fracture zone associated with mineralization is an electrical body with low resistivity （0-1 000 Ω·m）, and distinguished from other geological bodies.The combined application of a variety of geophysical exploration methods has a good effect on locating concealed intrusions and identifying altered fracture zones.

关 键 词：郭家岭花岗岩 遥感 航空磁法 Eh-4连续电阻率成像系统 CG-5相对重力仪 隐伏侵入体 胶东金矿 

分 类 号：P618.51[天文地球—矿床学]