甘肃北山金庙沟南大型硅灰石矿床地质特征及找矿标志  

Geological characteristics and ore exploration marks of the Jinmiaogounan large-size wollastonite deposit,Beishan,Gansu province

作　　者：李省晔 刘成刚 陈世强 LI Shengye;LIU Chenggang;CHEN Shiqiang(Fourth Institute of Geological and Mineral Exploraton of Gansu Provinical Bureau of Geology and Mineral Resourses, Jiuquan 735000, Gansu, China)

机构地区：[1]甘肃省地矿局第四地质矿产勘查院,甘肃酒泉735000

出　　处：《地质找矿论丛》2020年第4期373-379,共7页Contributions to Geology and Mineral Resources Research

基　　金：甘肃省地勘基金项目“甘肃省肃北县金庙沟南硅灰石矿普查”(编号:201701-D03)资助。

摘　　要：甘肃省肃北县金庙沟南硅灰石矿床产于敦煌岩群C岩组三岩段的石英硅灰大理岩与花岗岩的接触带及其附近,矿体呈透镜状、似层状产出。矿区共圈出硅灰石矿体16个,矿体长96~818 m,矿体厚度在1.20~12.33 m之间,矿石品位为φ(硅灰石)=35.53%~51.62%,含矿岩石为石英硅灰石大理岩。矿石的类型可分为团块状硅灰石方解石石英型矿石、薄层状硅灰石方解石石英型矿石。在矿床地质特征研究的基础上,对矿床成因类型进行了分析,提出了找矿标志,对甘肃北山寻找同类矿床具有借鉴意义。Jinmiaogounan wollastonite deposit in Subei County,Gansu province,is located in the contact zone between quartz wollastonite marble of the third member of C formation of Dunhuang group and granite and the vicinity.The ore body is lenticular and stratoid.There are 16 wollastonite ore bodies in the mining area with length 96 m-818 m and thickness 1.20 m-12.33 m and content of wollastonite 35.53%-51.62%.The host rock is quartz wollastonite marble.The ore types can be divided into two types:spoted wollastonite-calcite-quartz ore and thin layered wollastonite-calcite-quartz ore.Genesis of the deposit are analyzed and the prospecting marks established that refered to prospecting of the same kind of ore deposit in Beishan,Gansu Province.

关 键 词：金庙沟南硅灰石矿 矿床类型 矿床成因 找矿标志 甘肃省 

分 类 号：P619.239[天文地球—矿床学]