甘肃席芨水地区金矿床地质特征  

Geologic characteristics of the gold deposit in Xijishui,Gansu

作　　者：辛存林[1] 魏明[1] 都卫东[1] 陈世伟[1] 

机构地区：[1]西北师范大学地理与环境科学学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2012年第2期91-97,共7页Journal of Northwest Normal University(Natural Science)

基　　金：甘肃省科技支撑计划项目(1104FKCA116);甘肃省自然科学基金资助项目(096RJZA119)

摘　　要：甘肃席芨水地区红窝窝与东湾台子金矿床位于北祁连造山带东段,金矿体主要赋存于下志留系马营沟组地层中,呈脉状、透镜状产出.金矿化产于变砂岩、蚀变闪长岩、碎裂蚀变砂岩的断层破碎带中,具硅化、褐铁矿化、黄铁矿化、绿泥石化、高岭石化,以硅化为主.研究表明,下志留系马营沟组地层为矿源层;石英闪长岩可能为成矿提供了动力、热源和部分矿源;主成矿元素Au与Cu,Pb,Zn,Ag,As,Mo关系密切;成矿受地层岩性、构造、岩浆岩因素联合控制.The Hongwowo and Dongwantaizi gold deposit locates in the eastern section of the north Qilian orogen.The ore body occurs in Mayinggou group of lower Silurian system and is of vein or lenticular shape.Mineralization originates in the fault and fracture zone of meta-sandstones,altered diorite and chipped altered sandstone.Alteration types contain silicification,pyritization,ferritization,choritization and kaolinization.Silicification is the main one.Research shows that the source bed of gold is Mayinggou group of lower Silurian system.The quartz diorite probably provides mineralization with dynamics,thermal and part of the ore source.The main ore elements Au is closely tied up with Cu,Pb,Zn,Ag,As and Mo.The formation of the gold deposit is controlled jointly by above mentioned stratum,structure and intrusive rock.

关 键 词：金矿床 地质特征 控矿因素 甘肃席芨水 

分 类 号：P618.51[天文地球—矿床学]