江西省会昌县淘锡坝大型锡矿床构造控矿机制探讨  

Discussion on the structural ore-controlling mechanism of the Taoxiba large-scaled tin deposit in Huichang county,Jiangxi province

作　　者：徐敏林[1,2] 张国培 漆富勇[2] 刘孔隆 

机构地区：[1]中国地质大学(武汉)资源学院,武汉430074 [2]江西省地勘局赣南地质调查大队,江西赣州3410000 [3]广州市天高集团有限公司,广州510635

出　　处：《资源调查与环境》2011年第4期256-266,共11页Resources Survey & Environment

基　　金：国土资源大调查项目(199910200233)资助

摘　　要：淘锡坝锡矿床是近年探明储量达大型的锡矿床,是一种新的锡矿类型-隐爆层间裂隙带型。文章介绍了该矿床的地质特征和矿化特征,对矿区的构造进行了重点解剖,对构造控矿机理进行了探讨,提出火山机构及北东向断裂是矿区的控岩构造,控制了白垩纪成矿花岗岩体的侵入就位。而火山岩中大范围的隐爆层间裂隙带是良好的容矿构造,矿体赋存其中呈似层状,局部膨大形成厚达数十米的"锡矿包"。通过研究构造与矿化富集的内在联系,总结了该矿床的成矿规律。Taoxiba deposit is a new type of tin deposit,a cryploexplosive interstrutified fracture belt type deposit,with its explored reserves reaching to a large-scale.Based on studying the characteristics of geology and mineralization of the deposit,this paper analyzes the structure of the ore field and discusses the structural ore-controlling mechanism.The conclusion is that the rock-controlling structure is volcanic apparatus and NNE trending fracture structure that controlled intrusion and emplacement of Cretaceous ore-forming granites.Large-scaled crypto explosive interstrutified fracture belt occurred in volcanic rocks is the best host structure,where formed ore bodies with a stratiform-like shape,and locally expanded ore bodies show a ＂tin ore-bunch shape＂ with a thickness ranging from 10 to even 100 meters.The metallogenic regularity of the deposit is summarized based on studying internal relations between structure and mineralization enrichment.

关 键 词：隐爆层间裂隙带 控矿机理 锡矿 淘锡坝 江西 

分 类 号：P618.67[天文地球—矿床学]