内蒙古珠尔很沟锰多金属矿地质特征及成因探讨

珠尔很沟锰多金属矿地处内蒙古自治区西乌珠穆沁旗北部,勘探共圈定11条工业矿体,格根敖包组上部含铁锰碎屑岩为该区主要赋矿层位。在矿床成矿地质背景和矿床特征研究基础上,对该锰多金属矿的成矿模式与找矿标志进行了分析探讨,认为该区锰多金属矿的形成经历了胶体化学沉积分异作用阶段、热液交代作用阶段、淋滤交代作用阶段,提出地表出露的"铁锰帽"及"铁锰矿化"是最直接的找矿标志,区域上发育的北东向构造带在矿区内派生的次一级的北西-北北西向断裂破碎带与上石炭-下二叠统格根敖包组正常沉积碎屑岩中的薄层石灰岩或灰岩透镜体为间接找矿标志。

Geological characteristics and genesis of Zhuerhengou manganese polymetallic deposit, Inner Mongolia

Zhuerhengou manganese polymetallic deposit is located in the northern part of Xiwuzhumuqinqi Banner,Inner Mongolia Autonomous region. In this exploration,11 industrial ore bodies have been delineated,and"iron-bearing manganese clastic rocks"in the upper part of the Gegen-Aobao formation are the main ore-bearing beds in this area. Based on the study of the ore-forming geological setting and characteristics of the deposit,the author analyses and discusses the metallogenic model and prospecting criteria of the manganese polymetallic deposit,and concludes that the formation of the manganese polymetallic deposit in this area has undergone the stage of colloid chemical deposition differentiation. In the hydrothermal metasomatism stage,leaching metasomatism stage,it is suggested that the"iron manganese cap"and"iron manganese mineralization"exposed from the surface are the most direct prospecting indicators. The secondary NW-NW trending fault fracture belt developed in the area and the thin-layer limestone or limestone lens in the normal sedimentary clastic rocks of the upper Carboniferous-Lower Permian Gegen-Aobao formation are indirect prospecting markers.