坦桑尼亚卢帕金矿田中部姆娜兹姆莫加矿区土壤地球化学特征及找矿方向

坦桑尼亚姆娜兹姆莫加矿区位于坦桑尼亚乌本迪造山带东南卢帕金矿田中部,属典型的造山型金矿。为查明该区成矿规律,明确找矿方向,在区内开展了1∶10000土壤地球化学测量工作。通过元素分布、元素相关性、元素异常等特征研究表明,Au为本区主成矿元素;并指出在花岗片麻岩和二长花岗岩等岩性单元中,Au与As、Sb相关性不明显,金成矿作用对岩性单元及围岩无选择。依据成矿地质条件、地球化学异常及查证成果认为金异常浓集区、构造交汇部位、次级断裂及破劈理发育部位和不同岩性单元接触带是勘查重点地段。

Soil Geochemical characteristics and prospecting direction of Mnazimmoja ore district in the central part of the Lupa goldfield, Tanzania

The Mnazimmoja ore district is a typical orogenic gold deposit located in the middle of the Lupa goldfield, tectonically in the southeast of the Ubendian Orogenic belt.In order to clarify the ore-forming rules and determine the direction of prospecting,soil geochemical surveys are carried out in this area.The study of element distribution, element correlation and element anomaly shows that Au is the main metallogenic element in this area; it also indicates that in granitic gneiss and monzonite granite units, the correlation between Au and As and Sb is not obviously, gold mineralization has no choice for lithological units and surrounding rocks. According to the metallogenic geological conditions, geochemical anomalies and verification results, it is considered that the Au anomaly concentration area, structural intersections, secondary faults and cleavage and the contact zones of different lithological units are the key exploration areas.