| 海南抱板金矿田成矿流体地球化学研究 | |
| 肖志峰 | |
| 1992 | |
| Degree Grantor | 中国科学院地球化学研究所 |
| Place of Conferral | 中国科学院地球化学研究所 |
| Degree Name | 博士 |
| Degree Discipline | 地球化学 |
| Keyword | 地球化学 地球化学动力学 围岩蚀变 金矿 流体包裹体 绿泥石 |
| Abstract | 本文对海南抱板金矿田的土外山、抱板和二甲三个金矿的成矿流体进行了详细的地质地球化学研究。通过观察，建立了围岩蚀变分带模式。分析了蚀变带中绿泥石万分，提出由绿泥石成分计算其形成时温度及氧逸度的方法。对围岩蚀变分带进行地球化学动力学研究，讨论了各种因素对蚀变分带的影响。地球化学势力学研究发现S/Cl比值及温度是成矿过程中金铜的分离的主因。利用探针质谱等方法对矿脉中流体包裹体进行分析，认为成矿流体为低盐度，中-低温热液，成矿过程中未发生相分离。Pb、S、H和O等同位素表明成矿热液主要来自大气降水。在此这些研究的基础上，提出了矿床成因模式。 |
| Other Abstract | Geology and geochemistry study was carried out on three d\gold deposits: Tuwai shan, Baoban, and Erjia, in Baoban gold field, Hainan Island, China. Three wallrock alteration zones were recognized and the composition of chlorites in the alteration zones was analysed to compute the temperature and oxygen fugacity of the hydrothermal alteration. From geochemical kinetics modelling, the diffusive coefficient was thought as a key factor which controlled the formation of the alteration zones. Geochemical thermodynamics research showed that the gold and copper separation, a common phenomenon in gold deposits, was controlled by the S/Cl ratio and temperature. Methods including probe mass spectrometry were employed to study the fluid inclusions in gold quartz vein. The ore-forming fluid was of low salinity, medium-low temperature fluid without immiscibilty. The Pb, S, H, and O isotopes showed the ore-forming fluid might derive from metometric water. Based on those evidences, a genetic model for the gold deposits was presented. |
| Pages | 78 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/3896 |
| Collection | 研究生_研究生_学位论文 |
| Recommended Citation GB/T 7714 | 肖志峰. 海南抱板金矿田成矿流体地球化学研究[D]. 中国科学院地球化学研究所. 中国科学院地球化学研究所,1992. |
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| N88712.pdf（5312KB） | 暂不开放 | -- | Application Full Text | |||
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