金木达—南木达地区地球化学特征及找矿

Stream Sediment Geochemical Anomalies and Prospecting in the Jinmuda-Namda Region

对金木达—南木达地区1∶5万水系沉积物成矿元素的分布特征、相关性、分形及异常元素组合特征进行了研究,采用多重分形异常下限计算方法,圈定了该区Au、As、Sb异常范围。发现区内Au、As、Sb的异常规模大,多富集在三叠系新都桥组地层中,与金木达—南木达断裂带、燕山期中酸性侵入岩关系密切。元素离散程度大,成矿潜力较大。据此划分出卓钦—如伊沟及昂阔Au找矿远景区,为今后在该区进行进一步地质找矿工作打下了良好基础。

Au, As and Sb geochemical anomalies are delineated by 1：50 000 stream sediment survey in the Jinmuda-Namda area. Study indicates that these geochemical anomalies are in close relationship with the Triassic Xinduqiao formation, Jinmuda-Namda fracture zone and Yanshanian intermediate and acid magmatic rock masses with larger dispersion degree of elements. Zhuoqin-Ruyigou and Angkuo prospective areas for Au deposits are expected.