CAJ | 학술논문

内蒙古东乌珠穆沁旗地区是我国北部重要的银、铅、锌、铜、铁、钨、锡成矿集中区之一。区内古生界火山―沉积岩地层发育齐全、华力西期―燕山期岩浆岩类型繁多,各时代构造形迹分布广泛、成矿地质环境优越,已发现和圈定各类金属矿床(点)78处。以金属矿床(点)的容矿围岩为基础,并且结合其空间几何分布形态和部分矿床(点)成矿作用特征,将本区主要金属矿床(点)大体划分为以下5种类型。上泥盆统安格尔音乌拉组和石炭系宝力格庙组是本区多金属矿床的主要赋矿地层,华力西至印支期构造一岩浆活动与多金属矿成矿作用关系十分密切,NE 向深大断裂为导矿构造,控制和限定了成矿带内岩体和多金属矿的分布及产出,NW、NWW 和 NE 向的次级断裂是主要的成矿、容矿构造。NW、NWW 向构造与 NE 向主干断裂交汇地段以及中酸性侵入体内部、边部、接触带是本区最主要的多金属找矿的有利部位。
내몽고동오주목심기지구시아국북부중요적은、연、자、동、철、오、석성광집중구지일。구내고생계화산―침적암지층발육제전、화력서기―연산기암장암류형번다,각시대구조형적분포엄범、성광지질배경우월,이발현화권정각류금속광상(점)78처。이금속광상(점)적용광위암위기출,병차결합기공간궤하분포형태화부분광상(점)성광작용특정,장본구주요금속광상(점)대체화분위이하5충류형。상니분통안격이음오랍조화석탄계보력격묘조시본구다금속광상적주요부광지층,화력서지인지기구조일암장활동여다금속광성광작용관계십분밀절,NE 향심대단렬위도광구조,공제화한정료성광대내암체화다금속광적분포급산출,NW、NWW 화 NE 향적차급단렬시주요적성광、용광구조。NW、NWW 향구조여 NE 향주간단렬교회지단이급중산성침입체내부、변부、접촉대시본구최주요적다금속조광적유리부위。
East Ujimqin Banner region in Inner Mongolia is one of the most important ore concentration areas of silver,lead,zinc,copper,iron,tungsten and tin in north China.This region has distinguished metallo-genic geological environment because of the completely developed Paleozoic volcanic and sedimentary strata, diversified magmatic rocks from Hercynian to Yanshanian period and widely distributed complex structural features.Seventy-eight ore deposits (occurrences)of various metals have been discovered and delineated in this region.Based on the study on host wall rocks of these metal deposits (occurrences)and their spatial dis-tribution features,and on consideration of metallogenic characteristics of some of the deposits (occurrences), the main metal ore deposits (occurrences)in this region can be roughly divided into five types.Upper Devo-nian Angeeryinwula Formation and Carboniferous Baoligemiao Formation are the main ore-hosting strata. Tectonic-magmatic activities from Hercynian to Yanshanian period have close relationship with polymetallic ore-forming process.NE striking discordogenic fault is the main ore-transmitting structure which controls and limits the distribution and occurrence of rock bodies and polymetallic ore deposits in the metallogenic belt.NW,NWW and NE striking secondary fractures are the main ore-forming and ore-hosting structure. The intersections of NW and NWW striking structures and NE striking trunk fault as well as the interiors, margins and contact zones of neutrality-acidity intrusive rocks are the main ore-prospecting target parts in this region.