铜绿山矿田成矿远景预测及三维地质模型  

Metallogenic prospect prediction and 3D geological modeling for the Tonglyushan ore field

作　　者：刘豹 杨宇山[1] 刘天佑[1] LIU Bao;YANG Yu-Shan;LIU Tian-You(School of Geophysics and Geomatics,China University of Geosciences(Wuhan),Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)地球物理与空间信息学院,湖北武汉430074

出　　处：《物探与化探》2023年第4期906-915,共10页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金面上项目“基于多点地质统计学的重磁三维随机反演方法研究”(41974152)。

摘　　要：铜绿山矿田是鄂东南矿集区最重要的矽卡岩型铜铁金多金属矿田,其成矿与铜绿山岩株体关系密切。因此,查明该岩体深部展布和形态及其与周缘灰岩大理岩的接触关系,对矿田深部找矿预测具有十分重要的意义。笔者在细致分析铜绿山岩体及岩株体、灰岩大理岩及捕虏体、矽卡岩矿体及矿化体等重磁异常组合特征的基础上,推测铜绿山岩体的边界,圈定铜绿山岩体内部灰岩大理岩捕虏体和矿化体,利用三维物性反演、2.5D重磁人机交互反演、3D重磁人机交互反演结果,结合钻孔、地质资料开展三维地质建模,获得了铜绿山矿田4000 m以浅的岩体、矿化体的三维地质模型,为该区的靶区圈定及深部找矿预测提供依据。The Tonglvshan ore field is the most important skarn copper-iron-gold polymetallic ore field in the southeastern Hubei ore concentration area.Since its mineralization is closely related to Tonglvshan stocks,ascertaining the deep distribution and morphologies of these stocks and their contact relationship with surrounding limestones and marbles holds great significance for deep prospecting pre-diction of the ore field.This study first conducted a detailed analysis of the gravity and magnetic anomaly combinations of the Tonglvs-han pluton and stocks;limestones and marbles,as well as their xenoliths;and skarn ore bodies and mineralized bodies.Accordingly,this study inferred the boundary of the Tonglvshan pluton and delineated the xenoliths and mineralized bodies of limestones and marbles within the Tonglvshan pluton.Then,this study conducted the 3D geological modeling based on the results from the 3D physical proper-ty inversion and 2.5D and 3D gravity-magnetic human-computer interaction inversion,as well as the drilling and geological data.Final-ly,this study established a 3D geological model for the plutons and mineralized bodies at depths of 4000 m and below in the Tonglvshan ore field,providing a basis for target delineation and deep prospecting prediction.

关 键 词：铜绿山矿田 三维地质建模 人机交互反演 捕虏体 

分 类 号：P631[天文地球—地质矿产勘探]