吉林大车背沟地区水系沉积物地球化学特征及找矿远景

    Stream sediment geochemistry and prospecting prospect in Dachebeigou area of Jilin Province

    • 摘要: 吉林大车背沟地区位于兴蒙造山带东段南缘, 地球化学景观属于长白山森林沼泽景观区.该区及周边已发现桦甸市二道甸子金矿、幸福锑矿和蛟河市漂河川铜镍矿等矿产地76处, 具有良好的找矿前景.以1:5万水系沉积物测量17种元素含量数据为基础, 查明了各种元素的相关性、富集贫化特征、元素组合特征和主要元素的找矿潜力.结合区域地质背景及1:20万水系沉积物数据, 认为Au、Cu、Ni、Sb是区内主要成矿元素, 且元素异常套合较好.根据研究区成矿地质条件, 圈定综合异常25处、找矿远景区2处, 为下一步找矿工作提供了依据.

       

      Abstract: The Dachebeigou area of Jilin Province is located in the southern margin of eastern Xing'an-Mongolia orogenic belt, geochemically belonging to Changbai Mountain forest swamp landscape area. There are 76 mineral deposits such as Erdaodianzi Au deposit, Xingfu Sb deposit and Piaohechuan Cu-Ni deposit discovered in and around the study area, with good prospecting prospect. The correlations, enrichment-depletion characteristics and combination features of elements, as well as the prospecting potential of major elements, are ascertained based on the content data of 17 elements by the 1:50 000 stream sediment survey. Combined with regional geological background and 1:200 000stream sediment survey data, it is considered that Au, Cu, Ni and Sb are the main metallogenic elements, and their geochemical anomalies are well-matched. According to the metallogenic conditions of the area, 25 comprehensive anomaly areas and 2 prospecting prospective areas are delineated, which provides basis for further prospecting work.

       

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