坦桑尼亚姆贝亚Sangambi地区土壤地球化学特征

坦桑尼亚的Sangambi地区位于姆贝亚的东北部、卢帕金矿田的东部。通过1∶10 000土壤地球化学测量,圈定了6个Au,Cu,Cr,Ni元素的组合异常,其中ZH-1和ZH-6组合异常与金、铜的矿化关系密切,而ZH-3和ZH-4组合异常与铬、镍(铜)矿化有一定关系。在片麻状花岗岩、细晶闪长岩和花岗闪长岩中发育大量NW向的韧性剪切带和断裂构造,其中的石英脉中经常见有黄铁矿、黄铜矿和金的矿化,刻槽取样最高品位w(Au)=11.5×10-6。土壤测量的结果证实,在卢帕金矿田的东部依然存在金成矿的潜力。

Soil geochemical characteristics of Sangambi area, Mbeya region of Tanzania

Sangambi area is located in the northeast Mbeya and the east Lupa Au ore field. The survey at scale 1:10 000 delineates 6 element (Au, Cu, Cr, Ni) association anomlies of which anomly ZH-1 and ZH-6 are closely related to Au, Cu mineralization, anomly ZH-3 and ZH-4 related to Cr, Ni (Cu) mineralization. In the genissic granite, fine grained diorite and granodiorite there developed many NW ductile shear zones and faults in which quartz veins occur. In the veins pyrite, chalcopyrite and Au mineralization occur. w(Au)=11.5×10^-6 is the maximum of the channel sampling. The soil geochemical survey data show that the east Lupa Au ore field is also potential for Au prospecting.