渣滓溪锑钨共生矿床成矿条件及成矿机理

Metallogenic conditions and mechanism of Zhazixi symbiosis deposit of antimony and tungsten

渣滓溪锑钨矿床位于雪峰弧形成矿构造带中段,主要赋存于板溪群五强溪组上段的一套火山-碎屑岩沉积浅变质岩系中。其锑矿床产于北西向控矿构造中,矿脉成组分布,具有相似的等距和方向性;钨矿床产于五强溪组上段第三层石英砂岩、凝灰质砂岩中,矿体受岩性及层间节理裂隙控制,构成"层控型"钨矿层。锑矿脉走向与钨矿层走向近于直交,形成异体共生矿床。通过对该矿床成矿条件及其成矿机理分析,为矿区深边部及近外围的找矿勘查提供可靠的地质依据。

Zhazixi Antimony- Tungsten Deposit is belt. The ores are mainly deposited in a volcano - clastic located in the middle of Xuefeng arc tectonic mineralization sedimentary epimetamorphic rock system in upper Wuqiangxi Formation of Banxi Group. The antimony deposit occurs in the NW-trending ore-controlling structure with ore veins distributed in groups that are with equidistant and directional similarities; the tungsten deposit occurs in the third layer of quartz sandstone and tuffaceous sandstone of upper Wuqiangxi Formation,and the orebody is controlled by lithology and interlayer joints forming a“ strata-bound” tungsten layer. The antimony lode crossesthe tungsten layer nearly or- thogonally,forming a parabiosis deposit. The analysis of the metallogenic conditions and mechanism of this depositpro- vides a reliable geological basis for the deep and near peripheral prospecting .