江南东段成矿带香炉山矿田钨成矿地质特征与综合找矿模型  

Tungsten metallogenic geological characteristics and integrated prospecting model in Xianglushan Ore Field in the eastern part of Jiangnan Metallogenic Belt

作　　者：周贤旭 胡志戍 李晔 Zhou Xianxu;Hu Zhishu;Li Ye(The 2nd Geological Brigade of Jiangxi Bureau of Geology;Weihai City Wendeng District Natural Resources Bureau)

机构地区：[1]江西省地质局第二地质大队 [2]威海市文登区自然资源局

出　　处：《黄金》2023年第5期65-72,共8页Gold

基　　金：江西地质局地质勘查基金项目(2021AA16);“十一五”国家科技支撑项目(2009BAB43B03);“十二五”国家科技支撑计划项目(2011BAB04B03);中央地质勘查基金项目(2013360007);中国地质调查局发展研究中心项目(121201004000150017-10)。

摘　　要：香炉山矿田是江南东段成矿带九岭钨钼锡铜金多金属萤石高岭土成矿亚带的组成部分,也是赣北重要的钨多金属矿田之一。近年来,该矿田又陆续发现形坪、张天罗、大岩下等钨矿床。结合最新勘查、研究成果,研究了香炉山矿田钨成矿因素及成矿规律,认为震旦系上统—寒武系地层含碳、硅、泥质岩类与成矿关系密切,北东东向背斜及与北东向次级构造叠加交会明显制约矿床定位;赋矿地层不同岩性差异面的层间破碎带和细粒黑云母花岗岩与含碳、硅、泥质岩类的接触部位控制矿体的定位,构造叠加交会部位更有利于形成富厚矿体;矿体主要赋存在透辉石—黑云母变质带中,并且与云英岩化等蚀变有关;燕山晚期S型细粒黑云母花岗岩Rb-Sr等时线年龄为126.2 Ma±2.6 Ma,表明香炉山钨矿床的白钨矿Sm-Nd等时线年龄(121 Ma±11 Ma)与细粒黑云母花岗岩岩浆侵位所发生的时间有明显的耦合关系,暗示成矿作用与燕山晚期的花岗岩岩浆作用有关,并且细粒黑云母花岗岩体与钨成矿关系更为密切。在此基础上建立了香炉山矿田钨成矿模式及综合找矿模型。Xianglushan Ore Field is a component of the Jiuling W-Mo-Sn-Cu-Au polymetallic fluorite and kaolin metallogenic sub-belt in the eastern part of the Jiangnan Metallogenic Belt,and is also one of the important tungsten polymetallic ore fields in northern Jiangxi.In recent years,the ore field has successively discovered tungsten deposits such as Xingping,Zhangtianluo,and Dayanxia.Based on the latest exploration and research results,this paper has studied the metallogenic factors and laws of tungsten in Xianglushan Ore Field.It is believed that the Upper Sinian-Cambrian strata contain carbon,silicon,and argillaceous rocks that are closely related to metallogenesis,and the superposition and intersection of NEE-trending anticline with the NE-trending secondary structure obviously restrict the ore-forming location of the deposit;the ore body location is controlled by the interlayer fracture zone of the lithologically variant difference surfaces of the ore-bearing strata and the contact position between the fine-grained biotite granite and the charcoal,siliceous and argillaceous rock types,and the superposition and intersection are favorable to the formation of rich and thick ore bodies;the main ore bodies occur in the diopside-biotite metamorphic zone,and are related to the alteration such as greisenization;the Rb-Sr isochron age of the late Yanshannian S type fine-grained biotite granite is 126.2 Ma±2.6 Ma,indicating that the Sm-Nd isochron age of the scheelite(121 Ma±11 Ma)of Xianglushan Tungsten Deposit is in an obvious coupling relationship with the time when the fine-grained biotite granite magma emplacement occurred in the area,indicating that the metallogenesis is related to the granite magmatism in the late Yanshannian,and the fine-grained biotite granite body is more closely related to the tungsten metallogenesis.On this basis,the metallogenic model and integrated prospecting model of tungsten metallogenesis in Xianglushan Ore Field are established.

关 键 词：钨 香炉山矿田 成矿规律 成矿模式 找矿模型 

分 类 号：TD11[矿业工程—矿山地质测量] P618.67[天文地球—矿床学]