| 云南巍山—永平碰撞造山带走滑拉分盆地铜金多金属矿成矿流体系统：稳定同位素特征及热液来源 |
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| 引用本文：王 勇，侯增谦，莫宣学，董方浏，毕先梅，曾普胜.2006.Stable isotope characteristics and origin of ore_forming fluids in copper-gold polymetallic deposits within strike-slip pull_apart basin of Weishan-Yongping continental collision orogenic belt, Yunnan Province, China[J].Mineral Deposits,25(1):60~70 |
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| 基金项目:中国地质调查局国土资源大调查综合研究项目（20001020026003） |
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| 中文摘要:云南巍山—永平矿集区位于兰坪走滑拉分盆地南段，有铜金多金属中 、小型矿床及矿化点140余处，盆地发育和成矿作用与印度—亚洲板块碰撞密切相关。为了 探索该矿集区成矿热液的来源，研究了该区成矿流体的稳定同位素特征。区内成矿流体系统 可分为紫金山子系统与公郎弧子系统。公郎弧子系统内铜钴矿床成矿流体的δD为-83.8‰～ -69‰，δ18O为4.17‰～10.45‰，δ13C为-13.6‰～3.7‰，成矿流体主要来源于岩浆水及地层水。紫金山子系统内金、铅锌、铁矿床成矿流体的δD为-117.4‰～-76‰ ，δ18O为5.32‰～9.56‰，δ13C为-10.07‰～-1.5‰；锑矿成矿流体的 δD为-95‰～-78‰，δ18O为4.5‰～32.3‰, δ13C为-26.4‰～-1.9‰，成 矿流体来源于地层水以及岩浆水。受印度板块与亚洲板块碰撞造山作用的影响，在该盆地内 ，成矿流体自南西向北东大规模迁移过程中，先形成温度、盐度较高的公郎弧子系统，随着 流体向北东推进，温度、盐度逐渐降低，流体成分发生变化，演变为紫金山子系统。 |
| 中文关键词:地球化学 成矿流体系统 流体包裹体 稳定同位素 碰撞造山 巍山_永平矿集区 云南省 |
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| Stable isotope characteristics and origin of ore_forming fluids in copper-gold polymetallic deposits within strike-slip pull_apart basin of Weishan-Yongping continental collision orogenic belt, Yunnan Province, China |
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| Abstract:More than 140 middle_small size deposits or mineral occurrences occur in the Wei shan_Yongping ore concentration area located in the southern part of the typical Lanping strike_slip and pull_apart basin which has plenty of mineral resources d erived from the collision between Indian plate and Asian plate. The ore_forming fluid system in Weishan_Yongping ore concentration area can be divided into two subsystems, namely, Zijinshan subsystem and Gonglang arc subsystem. The ore_form ing fluids of Cu, Co deposits in Gonglang arc fluid subsystem have δD values b etween -83.8‰ and -69‰, δ18O between 4.17‰ and 10.45‰, and δ13 C between -13.6‰ and 3.7‰, suggesting that the ore_forming fluids of C u, Co deposits were derived mainly from magmatic water and partly from formation water . The ore_forming fluids of Au, Pb, Zn, Fe deposits in Zijinshan subsystem hav e δD values between -117.4‰ and -76‰, δ18O between 5.32‰ and 9.56‰, and δ13C between -10.07‰ and -1.5‰. The ore_forming fluids of Sb deposi ts in Zijinshan ore_forming fluid subsystem have δD values between -95‰ and -78‰, δ18O between 4.5‰ and 32.3‰, and δ13C between -26.4‰ a nd -1.9‰. Hence, the ore_forming fluids in Zijinshan subsystem must have been d erived mainly from formation water and partly from magmatic water. Affected by the collision between Indian plate and Asian plate, ore_forming fluids in Weisha n_Yongping basin migrated considerably from southwest to northeast. At first, th e Gonglang arc subsystem with high temperature and high salinity was formed. Wit h the development of the ore_forming fluids, the Zijinshan subsystem with lower temperature and salinity was subsequently formed. |
| keywords:geochemistry, ore_forming fluid system, fluid inclusion, sta ble isotope, collisional orogenesis, Weishan_Yongping ore concentration area, Yu nnan Province |
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