ISSN 1009-6248CN 61-1149/P 双月刊

主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

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    青海磨石沟地区锰矿地质特征及成因探讨

    Geological Characteristics and Genesis of Manganese Ore in Moshigou Area, Qinghai Province

    • 摘要: 青海磨石沟锰矿是近年来东昆仑南坡地区新发现的台盆相沉积型碳酸锰矿,主要赋存于中新元古界万宝沟群碳酸盐岩组顶部。含锰岩系及锰矿体具有厚度大、延伸稳定、岩性组合简单及整体品位偏低但储量较大的特点,是青海省内少数具有良好前景的锰矿勘查基地之一。根据磨石沟锰矿区的最新勘查成果,从成矿地质背景、矿区地质特征、厚大的白云岩–碳质板岩含锰岩系、层状密集分布的锰矿体、矿石质量特征及主–微量元素特征等方面推断矿床成因与热水沉积关系密切,初步探究磨石沟地区热水沉积锰矿的成矿模式。通过综合分析,初步评价磨石沟锰矿区的找矿潜力,为类似沉积型锰矿勘查提供找矿借鉴。

       

      Abstract: Moshigou manganese mining area in Qinghai is a platform basin sedimentary manganese carbonate deposit newly discovered in the south slope of East Kunlun in recent years, which mainly occurs at the top of the carbonate formation of Wanbaogou group in meso Neoproterozoic. Manganese bearing rock series and manganese orebody are characterized by large thickness, stable extension, simple lithologic combination, low overall grade but large reserves. They are one of the few manganese ore exploration bases with good prospects in Qinghai Province. According to the latest exploration results of Moshigou manganese mining area, it is inferred that the genesis of the deposit is closely related to hot water sedimentation from the aspects of metallogenic geological background, geological characteristics of the mining area, thick dolomite carbonaceous slate manganese bearing rock series, layered densely distributed manganese ore bodies, ore quality characteristics, main and trace element characteristics, etc., and the metallogenic model of hot water sedimentary manganese ore in Moshigou area is preliminarily explored. Through comprehensive analysis, the prospecting potential of Moshigou manganese mining area is preliminarily evaluated, so as to provide prospecting reference for similar sedimentary manganese ore exploration.

       

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