广西藤县大黎斑岩型钼矿地质特征及成因浅析

Geological characteristics and Genesis of Dali porphyry molybdenum deposit in Tengxian,Guangxi

大黎矿区位于南华准地台桂中—桂东台陷区内的大瑶山凸起东北部,处在凭祥—大黎区域性大断裂的东段,大瑶山东部金多金属成矿带上。矿区内共圈定钼矿体15个,钼矿体赋存于大黎岩体南端的内、外接触带,分布于接触面两侧100m～200m的地段内,钼矿体总体呈透镜状,中间巨厚,两端厚度收拢变小,接触带网脉状石英细脉发育地段为矿体的主要赋存部位,往接触面两端矿体收拢汇合,远离接触面矿体产生分支尖灭,厚度迅速变小,钼矿充填于网脉状石英细脉中,网脉状石英细脉沿岩体接触面和接触面附近呈带状分布,根据石英脉分布情况及见矿情况,表明矿体呈水平或近于水平的层状、似层状、透镜状分布。

Dali mining area is located in the northeast of Dayaoshan uplift in the guizhong-Dongtai depression, in the eastern part of pingxiang-dali regional fault and in the eastern part of Dayaoshan Gold polymetallic metallogenic belt. There are 15 molybdenum ore bodies in the ore district. Molybdenum ore bodies occur in the inner and outer contact zones of the southern end of the Dali rock body. Molybdenum ore bodies are distributed in the area of 100m-200m on both sides of the contact surface The main occurrence of the orebody is the netted quartz veinlets, which converge at the two ends of the contact surface, and the ore bodies are far away from the contact surface, causing the branch pinching out and the thickness of the ore bodies becoming smaller rapidly. The molybdenum ore is filled in the netted quartz veinlets Netted Quartz veinlets are distributed along the contact surface and near the contact surface of the rock body.