摘要
康古尔金矿是产于火山岩系中的蚀变岩型金矿床，矿化受韧性剪切带控制。矿物包裹体研究和热力学计算表明，成矿温度为３２０～１５０℃，成矿压力为６．０×１０７～１．５×１０７Ｐａ，成矿流体具中等盐度、弱酸性～中性、还原性较强等特点。成矿流体中金呈硫氢络合物形式迁移。金沉淀富集的机理是上升热液与大气降水的混合作用、溶液中还原硫含量的降低、温度的下降和ｐＨ值的变化等。矿床主要形成于韧－脆性变形阶段。
The Kanggul gold deposit is an alteration rock-type gold dePOsit formed in the volcanic rock sequence.The deposit is controlled by the ductile shear zone. By studying the mineral inclusion and calculating the data of thermodynamics it is found that the ore-forming temperature is 320-150℃,the pressure is 6. 00 ×107￣1. 50×107pa and the ore-forming fluid is mid-saltiness,neutral acidity and reduction, The gold is migrated in the form of sulfur-hydrogen complex in the fluid.The mechanism of the gold deposit-enrichment is as follows:a mixed function of the rising hydrothermal solution and the meteoric water; the decrease of reducing sulfur and temperature;the change of pH value in the solution and so on. The deposit was formed in the phase of ductile-brittle deformation.
关键词
金矿床
成矿
物理化学条件
成矿机理
Alteration rock-type gold deposit, ductile shear zone, ore-forming physicochemical conditions,oreforming mechanism, kanggul of Xinjiang
