| 新疆伊宁县伊尔曼德热泉型金矿床地质特征及成因 |
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| 引用本文：.1999.Characteristics and Genesis of the Yiermand Hot-spring Gold Deposit in Yining County, Xinjiang[J].Mineral Deposits,18(1):47~54 |
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| 基金项目:国家自然科学基金（49703043) |
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| 中文摘要:伊尔曼德金矿床赋存于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凝灰质碎屑岩中，成矿作用可分为热液喷发沉寂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。 |
| 中文关键词:大哈拉军山组 热液喷发角砾岩 硅化 金矿床 新疆伊尔曼德 |
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| Characteristics and Genesis of the Yiermand Hot-spring Gold Deposit in Yining County, Xinjiang |
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| Abstract:The Yiarmand gold deposit occurs in hydrothermally eruptive breccia of the 2nd Member of Lower Carboniferous Dahalajunshan Formation and its underlying arsenopyritized and pyritized tuffaceous clastic rocks, and the ore-forming process can be divided into hydrothermally-eruptive and sedimeniary siage and metasomatie siage. At the stage of hydrothermal sedimentation. hydrothermally eruptive breccia and other hydrothermal sediments were formed, gold was preliminarily concentrate, and cycling underground water caused the metasomatism of the hydrothermally eruptive breccia, thus concentrating gold again and forming hot spring gold deposit. Ore-bearing rocks are enriched in Au, Ag, As, Sb, Hg, Bi and impoverished in Cu, Pb, Zn. The mineralization took place near the surface, the ore-forming temperature was is about 80~90 ℃, the salinity of ore-forming fluid was lower than 1.0 % NaCl, and the metallogenic epoch was Early Carboniferous. |
| keywords:Dahalajunshan Formation, hydrothermally eruptive breccia, silication, gold deposit |
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