东昆仑五龙沟金矿床Ⅺ号金矿化带特征及找矿前景

摘要

Three ductile-brittle shear belts occur in the Wulonggou gold deposit, which is the largest gold deposit in the eastern Kunlun Orogen. And the Yingshigou-hongqigou ductile-brittle shear belt controls gold mineralized zone XI. The ore bodies within gold mineralized zone XI commonly distribute within brittle faults and related joints (cleavages) , are generally clustered in separated area, concentrate locally, and follow aggregation regulation of lateral reappearance and edge-away reappearance along the trend and inclination. The ore bodies mainly host in granites with presence of most gold in sulfides. Alteration related to gold mineralization is commonly zoned and includes silicifica-tion, sericitization, kaolinization, pyritization and arsenopyritization. Those metallogenic regularities are helpful to the ore prospecting in gold mineralized zone XI and Wulonggou gold deposit.%五龙沟金矿床是东昆仑造山带规模最大的金矿床,矿区内发育3条韧脆性剪切带,其中萤石沟—红旗沟韧脆性剪切带控制着Ⅺ号金矿化带.Ⅺ号金矿化带内矿体沿脆性断裂及其间的节(劈)理带分布,空间上分段集中,局部富集,沿倾向和走向有侧列再现和尖灭再现的群聚规律.矿体主要赋存于斜长花岗岩中,金主要赋存在硫化物中.围岩蚀变类型主要有硅化、绢云母化、高岭土化、黄铁矿化、毒砂化,并且在空间上有强弱分带的特征.通过对Ⅺ号金矿化带赋矿规律的分析研究和总结,为扩大该矿化带内金矿体规模、推动其他矿化带金矿找矿工作提供了依据.