桂北龙胜地区金矿成矿规律及找矿预测  

Metallogenic regularity and prediction of gold deposits in Longsheng area,northern Guangxi

作　　者：周守余 丁汝福 牛聪聪[1] 杨英 陶明荣 胡乔帆 李发兴 ZHOU Shouyu;DING Rufu;NIU Congcong;YANG Ying;TAO Mingrong;HU Qiaofan;LI Faxing(China Nonferrous Metals（Guilin）Geology and Mining Co.,Ltd.,Guilin 541004,Guangxi,China;China Non ferrous Metals Geological Survey,Beijing 100021,China)

机构地区：[1]中国有色桂林矿产地质研究院有限公司,广西桂林541004 [2]有色金属矿产地质调查中心,北京100012

出　　处：《矿产与地质》2018年第2期205-215,共11页Mineral Resources and Geology

基　　金：2001年中央财政补助地方地质勘查项目(财建[2001]616号;桂财建函[2002]13号);2017年广西找矿战略突破行动项目(桂国土资函[2017]397号);广西第三批特聘专家专项资金共同资助

摘　　要：桂北龙胜地区成矿条件良好,与国内外许多大型超大型金矿有类似成矿地质背景。研究认为:龙胜地区的大多数金矿床是产于前寒武纪浅变质碎屑岩系的脉状金矿。受NNE向断裂控制、围岩蚀变强度不高、矿物组合比较简单,金主要以自然金独立矿物形式存在。经流体包裹体、微量元素、稀土元素等方面研究,认为矿源主要来源于上地壳围岩,热源由地壳增温和断裂磨擦提供,成矿温度以130℃~230℃为主,属中低温热液矿床。根据地层、构造、岩浆岩及矿化蚀变特征,在该区划分出4处成矿远景区:Ⅰ—平等成矿远景区;Ⅱ—三门成矿远景区;Ⅲ—龙胜成矿远景区;Ⅳ—马海成矿远景区。The ore-forming conditions are favourable for gold deposits in Longsheng area,northern Guangxi,where the metallogenic background is similar to many large and super-large gold deposits in our country or abroad.The study result indicates that the most gold deposits are located in shallow metamorphic clastic rock series of Precambrian period as vein gold orebodies.They are controlled by the NNE fault,wall rock alteration intensity is not high,mineral composition is also simple,gold minerals exist in the form of independent native shape.On the basis of the fluid inclusions,trace elements,rare earth elements and sulfur isotopic study,it is suggested that the mineral resource is mainly derived from the surrounding rock,and that the heat source is provided by the crustal calescence and fault friction.The ore-forming temperature is in the range of 130℃-230℃.They belongs to the middle and low temperature hydrothermal deposits.According to the strata,structure,magmatic rocks and mineralization alteration features,the study area are divided into four metallogenic prospect districts for I-Pingdeng metallogenic prospect district,Ⅱ-Sanmen metallogenic prospect district,Ⅲ-Longsheng metallogenic prospect district andⅣ-Mahai metallogenic prospect district.

关 键 词：龙胜金矿 成矿规律 成矿预测 桂北 

分 类 号：P618.51[天文地球—矿床学]