论文部分内容阅读
伊尔曼德金矿床赋存于下石炭统大哈拉军山组第二岩性段硅化热液喷发角砾岩及其下伏上泥盆统吐呼拉苏组毒砂黄铁矿化凝灰质碎屑岩中，成矿作用可分为热液喷发沉积期和热液交代蚀变成矿期。由热液喷发作用形成的热液喷发角砾岩等热水沉积物，使金发生初步富集，循环的地下水热液与热液喷发角砾岩发生强烈的交代硅化蚀变作用，使金进一步富集而形成矿热泉型金矿床。含矿岩石富含Ａｕ、Ａｇ、Ａｓ、Ｓｂ、Ｈｇ、Ｂｉ，贫Ｃｕ、Ｐｂ、Ｚｎ。成矿环境为近地表，成矿温度为８０～９０℃，成矿流体盐度小于１．０％，成矿时代为早石炭世。
The Irmande gold deposit is hosted in the second lithologic section of the Lower Halajushan Formation in the Lower Carboniferous and is underlain by silicification hydrothermal eruption breccia in the upper Devonian Tuhurasu Formation In clastic clays, mineralization can be divided into hydrothermal eruption depositional stage and hydrothermal alteration alteration into ore-forming stage. Hydrothermal eruptions of breccia and other hydrothermal sediments formed by hydrothermal eruption resulted in the initial enrichment of gold and the intense hydrothermal alteration of groundwater hydrothermal fluids and hydrothermal eruption breccias, Enrichment and the formation of mineral hot spring type gold deposit. Ore-bearing rocks are rich in Au, Ag, As, Sb, Hg, Bi, depleted in Cu, Pb and Zn. The metallogenic environment is near-surface, the metallogenetic temperature is 80-90 ℃, the salinity of ore-forming fluid is less than 1.0%, and the metallogenic epoch is Early Carboniferous.