西藏多不杂—波龙矿集区铜矿床地质特征及找矿预测模型

发布时间：2018-03-23 12:48

本文选题：多不杂—波龙矿集区　切入点：铜矿　出处：《金属矿山》2017年11期

【摘要】：西藏多不杂—波龙矿集区位于金沙江缝合带和怒江缝合带之间,缝合带内已发现了多个成带状分布的金、铜、铬矿床,成矿地质条件优越。在详细分析多不杂—波龙矿集区地层、构造、岩浆岩、物化遥特征的基础上,以该矿集区内的多不杂铜矿为例,详细研究了该矿床的地质特征,并构建了包含岩浆岩特征、控矿构造特征、围岩蚀变特征、地层岩石类型、物化遥异常特征以及表生矿物组构的找矿预测模型。研究表明:经工程验证发现在多不杂—波龙集矿区的尕尔勤铜矿区内存在一个长10 km、宽3 km的巨型蚀变体,经ZK1901钻孔深部验证,当钻孔穿越300~400m厚的黄铁矿+硅化带后,逐渐出现了铜矿化体,且随着深度的增加,铜矿化更趋明显;在该集矿区NW侧存在规模较小的铜矿床,SE侧存在一个规模较大的黄铁矿,前者形成于距晓坑火山2.5 km处,沿NW走向的断裂破碎带区域内,晓坑火山机构SE侧2.5 km范围内的主含矿断裂为该矿集区下一步的重点找矿区域。上述分析对于在该矿集区进一步开展铜矿及其他多金属矿找矿勘探工作有一定的借鉴价值。
[Abstract]:The Dobuza-Bolong ore accumulation area in Tibet lies between the Jinsha River suture zone and the Nujiang suture zone. Many zonal gold, copper and chromium deposits have been found in the suture zone. On the basis of detailed analysis of stratigraphic, structural, magmatic, physicochemical and remote characteristics of the Dobou-Bolong ore accumulation area, the geological characteristics of the deposit are studied in detail, taking the Dobu complex copper deposit in the ore concentration area as an example. The characteristics of magmatic rock, ore-controlling structure, alteration of surrounding rock, types of strata and rocks are constructed. The characteristics of geophysical and chemical remote anomalies and the ore-prospecting prediction model of supergene mineral fabric are studied. The results show that there is a giant alteration of 10 km in length and 3 km in width in the Gaerqin Copper Mine area of Dobuza-Bolongji Mine, which is verified by engineering. Through the deep verification of ZK1901 borehole, when the borehole passes through the 300-400m thick pyrite silicification zone, the copper mineralization appears gradually, and with the increase of depth, the copper mineralization becomes more obvious. There is a large scale pyrite in the SE side of the NW side of the mining area, which is formed in the fracture zone along the NW strike, 2.5 km from the Xiaokeng volcano. The main ore-bearing fault within 2.5 km of the SE side of the Xiaokeng volcanic mechanism is the next key ore prospecting area in the ore concentration area. The above analysis has some reference value for the further exploration of copper and other polymetallic ore deposits in the ore concentration area.
【作者单位】：江门职业技术学院艺术设计系;
【分类号】：P618.41

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