青海省都兰县丘吉东沟金矿水系沉积物地球化学特征及找矿远景

Geochemical Characteristics of Stream Sendiments and Exploration Prospective of the Qiujidonggou Gold Deposit in Dulan County,Qinghai Province

都兰县丘吉东沟金矿区位于东昆仑成矿省,具有良好的成矿地质背景。由于矿区面积较大,区内成矿的有利部位难以圈定,从而限制了矿山的找矿与开采工作。为了揭露研究区矿体的成矿特征及找矿方向,通过对青海省都兰县丘吉东沟金矿开展1∶25000水系沉积物地球化学特征研究,探讨矿床成矿特征并圈定成矿靶区。通过开展水系沉积物研究发现:Ag、Pb、As和Sb元素与成矿元素相关性较高,可作为成矿的指示性元素;运用衬度异常圈定法,在研究区圈定了4个综合异常区,其中Ⅰ级异常1处,为AS-4号综合异常;Ⅱ级异常2处,分别为AS-1和AS-3号综合异常;Ⅲ级异常1处,为AS-2号综合异常。研究结果将为区域找矿理论研究和找矿方向提供依据。

The Qiujidonggou gold deposit in Dulan County is located in the middle of the east Kunlun metallogenic province,so it is necessary to carry out research on the reverse side of mineral exploration.The area has developed structures,frequent research activities,and a good metallogenic geological background.There are famous Wulonggou gold deposit and Tanjianshan gold deposit around the mine.Due to the good metallogenic background in this area,the area has attracted the attention of scholars at home and abroad.Most of the previous studies have focused on the geological characteristics of the deposits and the metallogenic age,and there are few studies on regional mineral exploration,which has led to no breakthrough in regional prospecting.Because the mining area is large and the coverage is serious,general physical and chemical exploration methods are difficult to meet the exploration needs,which limits the prospecting and mining work of the mine.In order to reveal the metallogenic characteristics of the ore bodies in the study area and the prospecting direction,this paper explores the 1∶25000 water system sediments in the Qiujidonggou gold deposit,to explore the mineralization characteristics and delineation of the deposit mine target area.Through research,it is found that the four elements Ag,Pb,As and Sb are highly correlated with metallogenic elements and can be used as indicator elements for metallogenic.Using the method of contrast anomaly delineation,four comprehensive anomalies were delineated in the study area.One type I anomaly is the AS-4 comprehensive anomaly and the second type anomaly is the AS-1 and AS-3 anomalies,third type anomaly is the AS-2 anomalies.This will provide a theoretical basis for the theoretical research and prospecting direction of regional prospecting.