| 攀西大陆槽稀土矿床深源成矿流体的稳定同位素证据 |
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| 引用本文：万德芳,田世洪.2004.攀西大陆槽稀土矿床深源成矿流体的稳定同位素证据[J].地球学报,25(2):161-164. |
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| 基金项目:国家重点基础研究项目(G1999043211) |
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| 中文摘要:通过对大陆槽矿床的成矿流体稳定同位素研究表明，矿体石英中流体包裹体的δD、δ^18O和δ^13C值分别为-87‰、 6．0‰和-8．4‰，矿石(氟碳铈矿)的δ^13C为-8．0‰，矿体萤石中流体包裹体的δD和δ^18O分别为-99‰和-11．6‰。研究表明，矿床的成矿流体应为少量大气降水混合的深源成矿流体，流体包体中和矿石中的碳则可能源自较深的壳幔混熔源区。 |
| 中文关键词:稳定同位素 稀土矿床 大陆槽 |
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| Stable Isotope Evidence of Deep Source Ore-forming Fluid in the Dalucao REE Deposit of the Panxi Rift |
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| Abstract:The features of the ore-forming fluid and the origin of the metallogenic material in the Dalucao REE deposit of Panxi rift were studied by means of H,O and C isotope analyses. The δ 13 C values of the bastnaesite change narrowly from -8.1‰ to -8.0‰ ,while the δD values vary from -89‰ to -79‰. The δD, δ 18 O and δ 13 C of the quartz-fluid inclusions in the orebody are -87‰,+6.0‰ and -8.4‰,whereas he δD and δ 18 O of the fluorite-fluid inclusions in the orebody are -99‰ and -11.6‰,respectively. The study shows that the ore-forming fluid was a mixture of magmatic water and meteoric water. The carbon isotopic features suggest that the carbon in the bastnaesite was derived from the mantle,while the carbon in fluorite-fluid inclusions of the orebody came from a mixed carbon source. |
| keywords:stable isotope REE deposit Dalucao |
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