文档介绍：矿产资源
Mineral resources
甘肃小铁山铅锌多金属矿床地质特征及控矿因素
郭恒恒
（甘肃省有色金属地质勘查局张掖矿产勘查院，甘肃乓）
摘要：小铁山铅锌多金属矿床位于秦祁昆造山系之新元古代—早寒武世白银厂裂谷东延部分，区域成矿条件良好，
属于白银厂矿田的重要组成部分。研究表明：矿体多层似层状、脉状及透镜状产出，赋矿岩石主要为细粒石英角斑质凝
灰岩及石英角斑岩，从矿体上盘至下盘具有“绿泥石化带→硅化—绿泥石化带→硅化—绢云母化带→绢云母化带”的蚀
变特征；矿床的控矿因素主要包括两方面：一是火山机构，二是火山岩建造。
关键词：铅锌铜多金属矿床；地质特征；控矿因素；围岩蚀变；小铁山
中图分类号：文献标识码：A 文章编号：1002-5065（）06-0066-2
Geological characteristics and ore-controlling factors of Xiaotieshan
lead-zinc polymetallic deposit in Gansu Province
GUO Heng-heng
onrrous mels geolol etion bureau Zhangye minel eratiostitute,Zhgye 734000,China)
Abstract: The Xiaotieshan Pb-Zn polymetallic deposit is located in the eastern extension of the Baiyinchang rift in the
Neoproterozoic to Early Cambrian of the Qinqi-Kunshan
and it isnmportanf resultshoae boes layeeined anncur,
and the ore-bearing rocks are mainly fine quartz keratophyletic tuff and quartzall to the
e ore bodies, the alteration cha zon→icationtione
tion -- sericite zon→ne ore-