赣北地区钨锡矿床NNE向中酸性岩脉的找矿指示意义  

The ore-prospecting indication of NNE striking intermediate-acid dikeof W-Sn deposit in North Jiangxi

作　　者：周贤旭 胡志戍 张磊 许瑞平 ZHOU Xianxu;HU Zhishu;ZHANG Lei;XU Ruiping(The 2nd Geological Brigade of Jiangxi Bureau of Geology,Jiujiang 332000,Jiangxi,China)

机构地区：[1]江西省地质局第二地质大队,江西九江332000

出　　处：《矿产与地质》2022年第1期40-48,共9页Mineral Resources and Geology

基　　金：江西省地质局“江西北部莲花山—九岭尖地区锡多金属矿成矿地质特征及找矿潜力研究”(2021AA16)项目资助。

摘　　要：赣北地区钨锡矿资源丰富,矿床类型多样,往往具有“多位一体”组合特征。在前人资料及研究成果的基础上,结合近年来的勘查成果,通过对区内钨锡矿成矿控制作用进行了初步分析归纳,认为燕山期形成的NE、NNE及NW向陆内断裂并伴随发生大规模岩浆活动而形成的“S”型花岗岩是本区重要的成矿构造和钨锡矿成矿母岩,不同类型的岩浆建造具有成矿专属性,一般深色花岗岩多与钨矿相关,锡多金属矿成矿则受浅色花岗岩制约。并且发现受先存NNE向断裂构造控制被动侵位形成的中酸性岩脉对钨锡矿找矿具有一定的指示意义,特别是NNE向含矿岩脉与岩脉下部存在成矿岩体的复合叠加时更具有较为明显的成矿专属指示性,即当其下部成矿岩体为深色花岗岩并直接关联时,一般形成钨(锡)矿床(体),而当下部成矿岩体为与其直接相关的浅色花岗岩时,则一般形成锡(钨)矿床(体),对今后本区找矿勘查研究工作具有一定的借鉴意义。There are rich tungsten and tin mineral resources in North Jiangxi Province.The types of deposits are various,which are often characterized by"all-in-one"assemblage feature.Based on the previous data and research result,with the combination of the exploration result in recent years,on the basis of the preliminary analysis and induction of the metallogenic controlling function of tungsten-tin deposits in the area,it is considered that the NE,NNE and NW striking intracontinental faults in Yanshan period and the"S"type granite formed by large-scale magmatic activity associated with the intracontinental faults are the important metallogenic structure and ore-forming parent rock of tungsten-tin deposits in this area.Different types of magmatic formations have the metallogenic specialization.Generally,dark color granite is mostly related to tungsten deposit,and the tin polymetallic deposit is restricted by light color granite.It is also found that the intermediate-acid dykes which are controlled by the preexisting NNE striking fault structure have a certain indicating significance for tungsten and tin ore prospecting,especially when the NNE striking ore-bearing dike and and the ore-forming rock mass under the dike are composite and superimposition,there has more obvious metallogenic specialization.In other words,tungsten(tin)deposit(orebody)is generally formed when the ore-forming rock mass under the dike is dark color granite and they directly related.Tin(tungsten)deposit(orebody)is generally formed when the ore-forming rock mass under the dike is light color granite and they directly related.It has a certain reference significance for the future exploration and prospecting work in this area.

关 键 词：钨锡矿 NNE向断裂 含矿岩脉 叠加复合 找矿指示 

分 类 号：P612[天文地球—矿床学]