青海省都兰县某锰矿成矿地质背景研究

A Study on Metallogenic Geological Setting of A Manganese Deposit in Dulan County of Qinghai Province

青海省都兰县某锰矿为一沉积-变质型锰矿床,处在祁连山、东昆仑及柴达木陆块三角交会部位,使青海省东昆仑成矿带东段铁、锰、铜、铅、锌、金、钨、锡成矿聚集。矿床形成受奥陶-志留纪滩间山群地层控制,长度100~1000 m,已控制倾向延伸50~220 m,平均厚度0.51~10.50 m,平均品位15.17%~26.69%,主要呈层状-似层状形式展布,矿体走向、倾向上连续,稳定性较好。主要矿物为蔷薇辉石,矿化蚀变为蔷薇石化、锰矿化、褐铁矿化和黄铁矿化等。随着上世纪本矿床发现至开采,浅部矿石资源量局部减少,矿山存在资源枯竭,面临可持续发展难题,急需寻找接替资源量。研究综合分析矿床的成矿地质背景,认为区内控矿地质条件与区域上一致,预测深部和矿区外围存在找矿前景。

Manganese Deposit in Dulan County of Qinghai Province is a sedimentary metamorphic manganese deposit,which is located at intersection Of Qilian Mountain,East Kunlun And Qaidam Continental Block.It is Metallogenic Accumulation of Iron,Manganese,Copper,Lead,Zinc,Gold,Tungsten and Tin in eastern section of the east Kunlun Metallogenic Belt of Qinghai province.The formation of the deposit is controlled by the strata of Ordovician Silurian Tanjianshan Groups with a length of 100~1000 m.It is a controlled tendency extension of 50~220 m with an average thickness of 0.51~10.50 m and an average grade of 15.17%~26.69%.It Is mainly distributed quasi layered form.We think the trend and tendency of the ore body will be stable.The main mineral is rhodonite in mineralization alteration and manganese mineralization,ferritization and pyritization.With the discovery and mining of the deposit in last century,the shallow ore resources have been reduced locally.And the mine is facing the problem of sustainable development.It is urgent to find replacement resources.This paper comprehensively analyzes the metallogenic geological background of the modified deposit.It is considers that the ore of controlling geological conditions will be with no difference in this area consistent.And it predicts that there are prospecting prospects in the periphery of the mining area.