大兴安岭成矿带北段区域地球化学背景与成矿带划分  

Regional Geochemical Background and Metallogenic Belt Division of North Da Hinggan Mountain

作　　者：赵丕忠 谢学锦[3] 程志中[3] 

机构地区：[1]中国地质大学(北京),北京100083 [2]北京建龙国基投资有限公司,北京100600 [3]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《地质学报》2014年第1期99-108,共10页Acta Geologica Sinica

基　　金：地质调查项目(编号1212010911036)资助成果

摘　　要：大兴安岭成矿带是中国最重要的有色金属成矿带之一,资源潜力巨大,其北段是中国除新疆以外唯一存在地质空白的地区,矿产勘查与研究程度低。笔者通过对其区域地球化学场特征、大中型内生金属矿床分布规律、区域控矿地质条件的研究,初步认为本区优势内生金属矿产是钼矿、银铅锌矿,其次是金矿和铜矿,潜力矿种是铀矿;以得尔布干、鄂伦春-伊尔施两条深断裂为界,其两侧地球化学背景、成矿环境、矿种及成因类型差异很大,并将大兴安岭成矿带北段划分为:得尔布干Ⅲ1、大兴安岭西坡Ⅲ2、嫩江Ⅲ3等3个Ⅲ级成矿亚带10个Ⅳ级成矿区。元素地球化学场及地球化学综合异常特征显示,得尔布干断裂、鄂伦春-伊尔施断裂向北延伸进入了上黑龙江地区,查干敖包-五岔沟-多宝山深断裂带具有铁族元素及亲氧的Ca、P、Mn、Ba、Sr组合,为典型的幔源成分+深海沉积物元素组合特征,断裂NE延伸至多宝山;元素组合表明大兴安岭东坡主要为岛弧-火山沉积建造,而西坡及得尔布干带中南段主要为裂谷-火山沉积建造。The Da Hinggan Mountain metallogenic belt is one of most important nonferrous metal metallogenic belt in China, due to huge resources potential. The northern Da Hinggan Mountain area is the geological work blank area except for Xinjiang, the mineral exploration and research level is very low. This paper summarizes the regional geochemical field characteristics, the large and medium-sized endogenous metal deposit distribution and regional geological condition in north Da Hinggan mountain area. The preliminary research indicates that advantages endogenous metal mineral is Molybdenum, Ag-Pb-Zn deposits, followed by gold and copper deposits, the potential for minerals uranium. In both sides of Derbugan fault, Elunchun-Yiershi deep fault, there are bigger various in geochemical backgrounds, metallogenic environment, minerals and mineralization types. The north Da Hinggan metallogenic belt is divided into： Derbugan, the Da Hinggan mountain West slope, Lengjiang, three third order metallogenic belts and ten fourth order metallogenic area.

关 键 词：大兴安岭 地球化学场 大中型矿床 成矿带 地球化学背景 

分 类 号：P617[天文地球—矿床学]