地球化学测量在黑龙江省宝泉铜矿勘查中的应用及找矿效果

Application and prospecting effect of geochemical survey in Baoquan copper mine exploration in Heilongjiang Province

宝泉铜矿位于黑龙江省黑河市附近,是黑河-嫩江铜金成矿带内近年来新发现的中型铜矿床。在该矿床的发现及勘查过程中,不同比例尺的地球化学测量工作均起到了至关重要的作用。研究表明,该矿床具有明显的地球化学异常特征,异常的主成矿元素均为Au、Ag、Cu、Mo,其中与矿体高度吻合的1∶5万辰-06-Hs-1和1∶1万Ⅳ-15Ht-4号组合异常综合排序均为第一,异常面积分别达39.3 km^(2)和3.42 km^(2),且浓集中心明显,异常强度较高且重现性较好,与铜矿体相吻合的Cu-20号土壤异常具内带,极大值为501.5×10^(-6),平均值为129.2×10^(-6)。工程揭露发现铜矿体的赋存部位、空间展布及规模产状均与各元素的异常特征高度吻合。从异常分布上来看,铜元素沿正南及北东向具有一定的延伸,经后期钻孔验证后,与铜矿体产状一致,证明异常对找矿有明显效果。该方法为区域异常圈定和控制矿体的延深、延展提供理论依据。

Baoquan copper mine is located near Heihe City,Heilongjiang Province,is a newly discovered medium-sized copper deposit in the Heihe-Nenjiang copper-gold metallogenic belt in recent years.In the process of discovery and exploration of the deposit,geochemical survey of different scales has played a vital role.The results have shown that the deposit has obvious geochemical anomaly characteristics,and the main ore-forming elements are Au,Ag,Cu and Mo.Among them,the combined anomaly sequence of 1∶50000 Chen-06-HS-1 and 1∶10000Ⅳ-15Ht-4,which are highly consistent with the ore body,is the first,and the anomaly area is 39.3 km^(2) and 3.42 km^(2) respectively.The concentration center is obvious,the anomaly intensity is high and the recurrence is good.The Cu-20 soil anomaly,which is consistent with the copper ore body,has an inner zone.The maximum value is 501.5×10^(-6),and the average value is 129.2×10^(-6).The occurrence location,spatial distribution and scale occurrence of the copper body revealed by the project are highly consistent with the abnormal characteristics of each element.From the perspective of anomaly distribution,the copper element has a certain extension along the direction of due south and northeast,which is consistent with the occurrence of copper ore body after the verification of late drilling,which proves that the anomalies have obvious effect on prospecting.This method will provide a theoretical basis for delineating regional anomalies and controlling the depth and extension of ore bodies.