新疆西准阿克塔木金矿化探异常特征及找矿前景分析

Analysis of prospecting perspective and geochemical anomaly characteristics of Aktamu gold deposit in West Junggar,Xinjiang

为了对新疆托里县幅1∶20万水系沉积物测量所圈定的“61丙”号异常区进行检查,在研究区开展了1∶1万土壤地球化学测量。通过合理确定研究区土壤中Au元素背景值与异常下限,用异常下限值圈定异常。利用岩石地球化学剖面测量进一步验证土壤地球化学异常,最终确定了土壤地球化学测量在该区找矿工作中的适用性和可靠性。通过分析矿区地球化学及异常特征等,研究异常与矿化的相互关系,发现该区发育明显的Au、Ag、Cu、Bi综合异常,且异常套合性好,异常规模与金矿床规模成正比,其分布与NW向断层具明显的相关性。圈定的3个找矿靶区均与综合异常相套合,总结该区金矿找矿标志,为哈图山金成矿带西南缘寻找金矿提供化探依据。

In order to examine the anomaly area"61C"delineated by the stream sedimentary survey of 1∶200000scale in Torrey County of Xinjiang,the soil geochemical survey of 1∶10000scale is carried out in the study area.Au background value and anomaly lower limit of soil in the study area are determined reasonably,and the anomaly is delineated with the anomaly lower limit.Soil geochemical anomaly is further verified by rock geochemical profile survey.Finally,the applicability and reliability of soil geochemical survey in the prospecting work are confirmed in this area.By analyzing the geochemical characteristics and anomaly feature in the mining area,the relationship of the anomaly and mineralization is studied.It is shown that there are found for the comprehensive anomalies of Au,Ag,Cu and Bi in this area.The scale of anomaly is proportional to the scale of gold orebody.The gold anomaly distribution is obviously correlated with the NW striking fault.The three prospecting target areas delineated are consistent with the comprehensive anomaly.The prospecting marks of gold mineralization in this area are summarized.It provides a geochemical basis for the gold exploration in the southwest margin of Hatushan gold metallogenic belt.