邹家山铀矿床矿体形态、规模及其变化特征

Orebody Shape,Size and Its Variation Characteristics in Zoujiashan Uranium Deposit

邹家山铀矿床位于相山火山-侵入杂岩体西部,产于早白垩世碎斑熔岩和流纹英安斑岩中。勘查报告显示,矿体受NE向断裂、裂隙控制,矿体形态简单,呈脉状、透镜状,成群、成带,产状单一,倾向NW,倾角40°~60°。但开采资料表明,矿体形态复杂,有脉状、透镜状,也有囊状、折线型、弧型、Y字型、人字型和树杈状等。在空间分布上,北东端矿体走向大多为NE向,倾向NW;往南西方向,矿体产状变得较复杂,有的矿体呈近EW走向,倾向S,有的呈NW走向,倾向SW,还有的呈SN走向,倾角较大;到了47线以南,矿体走向多为NW向,倾向SW。同时还发现,许多矿体明显偏小,现有的钻探间距难以对其形态和规模准确控制。

Zoujiashan uranium deposit is located in the west of Xiangshan volcano intrusive complex, hos- ted by the Early Cretaceous porphyroclastic lava and rhyolite dacite porphyry. Exploration report shew that the orebody are controlled by NE trending faults, fissures with simple shape of vein, and lenticular in group and belt and single occurrence of NW strike and 40 ° ~60 °dip angle. But the mining data shew that, the orebody shape are quite complex, beside in vein, lenticular there also in cystic, broken line, arc, ＂ Y＂, ＂ 人＂ shape. In spatial distribution, orebodies in the north most trend in NE and dip to NW. In the south beyond line 47, orebodies becomes more complex, some ore body are nearly EW strike and dip to south, some with NW strike and dip to SW, and some with north- south strike and bigger dip an- gle. In mining, many orebodies are significantly become smaller, the carried out drilling space are diffi- cult to accurately control the ore body.