甘肃新金厂金矿床地质特征及成矿条件分析  

Analysis on geological characteristics and ore-forming conditions of Xinjinchang gold deposit in Gansu

作　　者：张道忠[1] 

机构地区：[1]天津华北地质勘查总院,天津300181

出　　处：《矿产与地质》2010年第3期204-209,共6页Mineral Resources and Geology

摘　　要：新金厂金矿床含矿层位为下二叠统哲斯群下岩组火山岩段,主要岩性为玄武岩、英安岩。矿床中共有49条矿体,矿体形态主要为脉状、透镜状;矿石自然类型为含金强氧化矿石。矿床控矿因素为构造、围岩、以及围岩蚀变,其中断裂构造是控矿的主要因素,它控制了矿体的展布范围和具体特征。矿区具有良好的成矿条件——矿源层的存在、相互配套的断裂控矿系统、发育良好的围岩蚀变,因而形成了具有较高工业价值的矿床。总结出找矿模式为:围岩(矿源层)+断裂+蚀变,指出了区带、矿区及外围具有良好的找矿前景。The ore-bearing layer of Xinjinchang gold deposit is volcanic rock section of Xiayan formation of Zhesi group of lower Permian,its lithology is mainly consisted of basalt and dacite.In the deposit,there are 49 ore bodies with veined and lenticular morphology and the natural type of ore body is gold-bearing strong oxidation ore.The ore-controlling factors for the deposit are structure,wall-rock and wall-rock alteration,where the fracture structure is major control factor which controls the distribution scope and concrete features.It has good mineralization conditions——existence of source-bed,mutual matching fracture ore-controlling system and well developed wall-rock alteration form the deposit with high industrial value.On the analysis of mineralization conditions,it concludes that prospecting pattern is as follows： wall-rock（source-bed）,fracture,alteration,also it points out there is good prospecting future in such area and periphery.

关 键 词：金矿床 地质特征 构造控矿 找矿方向 新金厂 甘肃 

分 类 号：P618.51[天文地球—矿床学]