内蒙乱石山北地区成矿地质特征及成矿条件分析

Regional Metallogenic Geological Characteristics and Mineralization Conditions in the North of Luanshishan Area of Inner Mongolia

研究区横跨方山口-营毛沱-鹰嘴红山早古生代活动陆缘(Ⅱ-3-1)和磁海-红柳园-白山堂晚古生代陆内裂谷(Ⅱ-3-3),是寻找铜钨金多金属矿产的极具潜力地区。在综合分析以往多年工作成果基础上,系统总结了研究区区域成矿地质背景、成矿地质条件、主要矿床类型。通过沉积建造、岩浆活动成矿专属性、构造-岩浆活动-成矿作用的耦合关系分析表明,研究区成矿地质条件优越;区域矿化类型可划分为基性超基性岩浆型、中酸性侵入岩浆热液型、构造蚀变岩型、热液型。认为该地区今后工作的总体思路是以精细地质调查研究为基础,以物化探、遥感为手段,以地表矿化线索为切入点,以上述总结的各类矿床类型的成矿规律为参考,逐步逼近工业矿体。

The study area stretch across the Fangshankou-Yinmaotuo-Yingzuihongshan early Paleozoic active plate margin( Ⅱ-3-1) and Cihai-Hongliuyuan-Baishantang late Paleozoic Inner continental rift vally( Ⅱ-3-3),is a very important and potential metallogenic belt for Cu,W,Au. Based on comprehensive analyses,the metallogenic setting,ore-forming geological conditions,major deposit types are described briefly. The analysis of sedimentary formation,metallogenic specialization of igneous activity,the coupling relationship of tectogenesis-magmatism-mineralization suggest good ore-forming geological conditions and prospecting potential for this area. The main mineralized types of this area are magmatic type of basic and ultrabasic,thermal type of neutral or acid igneous,structural altereds type,thermal type. We thought the general idea for the future prospecting is to take the fine geological survey and research as the basis,the geophysical exploration,geochemical exploration,remote sensing as the means,the clue of mineralization at surface as the breakthrough point,the deposit typies and metallogenic regularities as the reference.