| 新疆东天山垅西金矿床地质和地球化学特征 |
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| 引用本文：.2003.Geology and Geochemistry of Longxi Gold Deposit in East Tianshan Mountain, Xinjiang[J].Mineral Deposits,22(2):208~216 |
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| 基金项目:国土资源大调查项目(200310200001-3)及国家重点基础研究项目(2001CB409807和G1999043216) |
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| 中文摘要:垅西金矿是东天山地区较为典型的石英脉型金矿床，文章对该矿床进行了 流体包裹体的温度测定、气液相成分分析、稀土元素分析和氢氧同位素分析。研究结果表明，垅西金矿的成矿温度为222～313℃，成矿深度为2～3.2 km，属中成中温热液矿床；流体包裹体中H2O和CO2为主要气相成分，Na＋、K＋和Cl-为主要液相成分；成矿流体 主要来自岩浆水，晚期混入少量大气降水；成矿金属物质主要来自下石炭统企鹅山群中基性 火山岩。 |
| 中文关键词:地质学 地球化学 石英脉型 垅西金矿 东天山 |
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| Geology and Geochemistry of Longxi Gold Deposit in East Tianshan Mountain, Xinjiang |
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| Abstract:The Longxi gold deposit, located in the Dananhu-Tousuquan Island Arc Belt north of Kanggur ductile shear zone, is a typical quartz vein gold deposit. It is host ed in the Hercynian plagiogranite porphyry which intruded into basalt and andesi te of the Lower Carboniferous Qi'eshan Group. Its orebodies are completely contr olled by approximately EW-trending ductile-brittle or brittle fractures. In this paper, temperatures, components, rare earth elements and H-O isotopes of fluid inclusions from the Longxi gold deposit were determined. According to the temper ature and gas-liquid component data of fluid inclusions, the ore-forming tempera tures range from 222℃ to 313℃, the ore-forming depths vary from 3.2 km to 2 km , the gas components of fluid inclusions are mainly H2O and CO2, and the liq uid components of fluid inclusions are mainly Na＋, K＋and Cl-. The H-O is otopic data and REE composition of fluid inclusions indicate that the ore-formin g fluids were mainly magmatic water mixed at the late ore-forming stage with sma ll amounts of meteoric water, and the ore-forming metallic materials were derive d from basalt and andesite of the Lower Carboniferous Qi'eshan Group. |
| keywords:geology, geochemistry, quartz vein type, Longxi gold deposit, East Tianshan Mountain |
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