基于重磁联合反演及三维可视化技术的玲珑复式岩体深部形态研究及其地质意义  

Study of Deep Morphology of Linglong Complex Rock Mass and Its Geological Significance Based on Gravity-Magnetic Joint Inversion and 3D Visualization Technology

作　　者：贺春艳 王润生 魏印涛 宋明春 刘洪波 刘晨成 王冉 郭国强 李振涛 李娜 HE Chunyan;WANG Runsheng;WEI Yintao;SONG Mingchun;LIU Hongbo;LIU Chencheng;WANG Ran;GUO Guoqiang;LI Zhentao;LI Na(Shandong Institute of Geophysical and Geochemical Exploration,Jinan 250013,Shandong,China;Shandong Engineering Research Center of Underground Resources and Environment High Precision Detection,Jinan 250013,Shandong,China;Shandong Provincial Engineering Research Center for Geological Prospecting,Jinan 250013,Shandong,China;Hebei GEO University,Shijiazhuang 050031,Hebei,China)

机构地区：[1]山东省物化探勘查院,山东济南250013 [2]地下资源环境高精度探测山东省工程研究中心,山东济南250013 [3]山东省地质勘查工程技术研究中心,山东济南250013 [4]河北地质大学,河北石家庄050031

出　　处：《黄金科学技术》2024年第6期949-964,共16页Gold Science and Technology

基　　金：国家自然科学基金项目NSFC-山东联合基金项目“胶东深部金矿断裂控矿机理”(编号:U2006201);2024年部省协议地质勘查项目“胶东金矿深部协同三维精细探测技术研究及找矿预测”(编号:鲁勘字(2024)68号);山东省科学技术厅重大创新工程项目“深部探测综合地球物理技术”(编号:2018CXGC1601);山东省地矿局科技创新及攻关项目“胶东深部金矿断裂综合地球物理特征研究”(编号:KY202112);“胶西北矿集区招平断裂带深部电性结构研究”(编号:KY202226)联合资助。

摘　　要：玲珑复式岩体是胶东西北部著名的花岗大岩体,也是胶东金矿集区最为重要的赋矿岩石,以花岗岩为围岩或主要以花岗岩为围岩的金矿约占胶东金矿集区总金金属储量的90%以上。以胶东地区21世纪以来完成的1/5万高精度重磁数据为基础,在已知地质、钻探和大深度地球物理探测剖面等资料的约束下,采用人机交互的重磁联合反演方法,综合解释了胶东西北部47条剖面的二维地质特征,利用三维可视化平台构建了玲珑复式岩体三维模型,综合解释的玲珑复式岩体中心厚度约为15 km,呈不规则蘑菇云状,其核部可能有较大规模白垩纪A型花岗岩侵入。研究结果对于认识胶东金矿成矿后的变化保存情况和深部金资源预测评价具有重要的参考意义。The Linglong complex rock mass,a prominent large granite body located in the northwest of Jiaodong,serves as the principal ore-hosting rock within the Jiaodong gold concentration area.Notably,gold deposits associated with granite as the primary wall rock constitute over 90%of the total metal reserves in this region.This complex primarily comprises the Late Jurassic Linglong intrusive rock,along with the Early Cretaceous Guojialing,Weideshan,Laoshan,and Yushan intrusive rocks,among others.The Linglong complex rock mass,a significant intrusive rock formation in eastern China,is crucial for understanding regional geological structures and informing mineral resource development.Utilizing high-precision gravity and magnetic data at a 1∶50000 scale from the Jiaodong area,collected since the early 21st Century,and constrained by existing geological,drilling,and deep geophysical survey profiles,the 2D geological characteristics of 47 sections in the northwest of Jiaodong were comprehensively interpreted by using the gravity and magnetic inversion method with man-machine interaction.Based on this foundation,a three-dimensional model of the Linglong composite rock mass has been developed utilizing a 3D visualization platform.Comprehensive analysis reveals that the Linglong composite rock mass exhibits an irregular mushroom cloud-like morphology,with a central thickness measuring approximately 15 kilometers.The predominant component of this complex is the Late Jurassic Linglong intrusive rocks,while the core may contain a substantial Cretaceous A-type granite intrusion.Although these formations appear sporadically on the Earth’s surface,they are interconnected at depth and exhibit a significant scale of occurrence.Drawing upon findings from prior studies concerning the erosion degree of intrusive rocks,as well as the age and rate of large-scale crustal uplift,it is inferred that the Linglong complex rock mass was situated at a depth of approximately 30 km to 35 km during the Late Jurassic period.This research holds sign

关 键 词：胶东金矿 玲珑复式岩体 重磁联合反演 三维可视化 剥蚀深度 

分 类 号：P618.51[天文地球—矿床学]