山丹县茅山顶石英岩矿床特征及成因探讨  

Characteristics and Genesis of Maoshanding Quartzite Deposit in Shandan County

作　　者：白兆安 梁栋 陈彦文[1] 康增 BAI Zhao-an;LIANG Dong;CHEN Yan-wen;KANG Zeng(Gansu Branch of China National Geological Exploration Center of Building Materials Industry,Tianshui 741000,China)

机构地区：[1]中国建筑材料工业地质勘查中心甘肃总队,甘肃天水741000

出　　处：《中国非金属矿工业导刊》2025年第1期11-14,18,共5页China Non-Metallic Minerals industry

摘　　要：茅山顶石英岩矿床是甘肃省首次发现的海相化学沉积受变质型矿床,成矿原岩为浅海环境下硅质胶体聚集沉积形成的硅质岩,在区域低温动力变质作用下,经变质重结晶形成石英矿床。矿床赋存于蓟县系墩子沟群中组二岩段含硅质条带细晶白云岩中,矿体形态受地层控制,属层控型矿床。矿石质量受海相沉积环境影响,矿石矿物石英含量高,脉石矿物以化学沉积的白云石为主且含量低,矿石质量优良。通过研究该地区矿床地质特征及成因,对今后寻找该地区同类矿床具有重要意义。The Maoshanding quartzite deposit is the first discovered marine chemical sedimentary metamorphic deposit in Gansu Province.The ore-forming original rock is a siliceous rock formed by the accumulation and deposition of siliceous colloids in a shallow sea environment.Under regional low-temperature dynamic metamorphism,the quartz deposit is formed by metamorphic recrystallization.The ore deposit is located in the fine-grained dolomite with siliceous bands in the second rock section of the Jidunzigou Group in Jixian County.The morphology of the ore body is controlled by the strata and belongs to the layer controlled type of ore deposit.The quality of ore is influenced by the marine sedimentary environment,with high quartz content in the ore mineral and low content of chemically deposited dolomite as the main gangue mineral,resulting in excellent ore quality.Studying the geological characteristics and genesis of this deposit is of great significance for searching for similar deposits in the region.

关 键 词：石英岩 矿床特征 矿床成因 

分 类 号：P619.233[天文地球—矿床学]