| 新疆萨瓦亚尔顿金锑矿床成矿作用同位素地质年代学 |
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| 引用本文：陈富文,李华芹.2003.新疆萨瓦亚尔顿金锑矿床成矿作用同位素地质年代学[J].地球学报,24(6):563-567. |
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| 基金项目:国家重点基础研究发展规划项目(编号:2001CB409810和G1999043201)，国家科技攻关计划“新疆优势矿产资源勘查综合研究”(编号2001BA609A0718) |
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| 中文摘要:萨瓦亚尔顿金锑矿床形成的时代和成矿期次一直存在较大争议。成矿作用同位素地质年代学研究表明 ,多金属硫化物和少金属硫化物含金石英脉矿物流体包裹体Rb Sr等时线年龄分别为 342± 2 7Ma和 2 4 6± 16Ma ,表明萨瓦亚尔顿金锑矿成矿作用至少有 2期 :第 1期发生在石炭纪 ,第 2期发生在晚二叠世—早三叠世 ;矿区出露的二长斑岩脉单颗粒锆石U Pb年龄为133.7～ 131.0Ma,表明岩浆侵位时间发生在晚侏罗世—早白垩世 ,属燕山中晚期岩浆活动的产物成矿后侵位的岩浆岩。 |
| 中文关键词:金锑矿床 成矿作用年代学 萨瓦亚尔顿 中吉边境 |
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| Metallogenic Chronology of the Sawayaerdun Gold-Antimony Deposit in Xinjiang |
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| Abstract:The ore-forming ages and phases of the Sawayaerdun gold-antimony deposit constitute a problem of long controversy. Isotopic geochronological study of the ore-forming process shows that fluid inclusion Rb-Sr isochron ages for gold- and polymetallic sulfides-bearing quartz veins and gold-bearing quartz veins with small quantities of sulfides are 342±27 Ma and 246±16 Ma,respectively,which indicate that mineralization of gold in this orefield experienced at least two epochs,namely Carboniferous and Late Permian-Early Triassic. The single zircon U-Pb age of 133.7～131.0 Ma for monzonite-porphyry in the orefield implies that the magma was intruded after the ore-forming process in Late Jurassic to Early Cretaceous. |
| keywords:gold-antimony deposit isotopic geochronology for mineralization Sawayaerdun China-Kirghiz border area |
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