| 右江盆地低温金、锑矿床热液石英显微结构和地球化学特征及 对成矿的指示 | |
| Alternative Title | Microtextures and geochemical characteristics of hydrothermal quartz from low-temperature gold and antimony deposits in the Youjiang basin, SW China: implications for the mineralization process |
| 李锦伟 | |
| Subtype | 博士 |
| Thesis Advisor | 胡瑞忠 |
| 2019 | |
| Degree Grantor | 中国科学院大学 |
| Place of Conferral | 中国科学院地球化学研究所 |
| Keyword | 右江盆地 卡林型金矿床和脉状锑矿床 石英 微量元素和氧同位 素 成矿流体成因 |
| Abstract | 右江盆地低温 Au-As-Sb-Hg (Tl)矿集区是华南大面积低温成矿域的重要组成部分，区内分布有大量的卡林型金矿床和锑矿床。前人对这些金、锑矿床的成矿地质特征、成矿过程和动力学背景，开展了大量研究并取得诸多重要进展。然而，关于其成矿时代、成矿物质来源、成矿流体性质、金锑矿床的成矿过程和元素共生分异机制等科学问题尚存争议。热液成因石英是低温卡林型金矿床和锑矿床中重要的脉石矿物，其形成贯穿整个成矿过程。因此，不同成矿阶段热液石英的同位素和微量元素等信息可以记录成矿过程，揭示成矿流体性质和来源。得益于目前国际上已经发展成熟的 SIMS 和 LA-ICP-MS 等原位分析技术，使得开展不同成矿阶段热液石英的原位氧同位素和微量元素分析成为可能。据此，本文选择右江盆地典型的丫他和八渡卡林型金矿床，以及晴隆和八渡锑矿床为研究对象。在详实的野外工作和室内岩石学、矿物学和地球化学研究的 基础上，结合样品背散射和阴极发光等观测结果，建立准确的矿物共生序列，划分不同成矿阶段的热液石英；对不同阶段热液石英单矿物氢氧同位素和包裹体气相成分进行分析，结合 SIMS 原位石英氧同位素和 LA-ICP-MS 原位石英微量元素分析结果，揭示上述矿床的成矿流体来源、流体演化过程和金、锑元素共生分异机制。 |
| Other Abstract | The Youjiang basin is an important Au-As-Sb-Hg(Tl) polymetallic metallogenic province in South China low-temperature metallogenic domain. The metallogenic
background and ore-forming process of low-temperature deposits dominated by gold, antimony, arsenic and mercury in the region have been widely concerned by many scholars and have obtained a lot of research results. However, there are still many controversies about the mineralization age of the Carlin-type gold deposits, the source of ore-forming fluids, and the symbiotic differentiation mechanism of the gold and antimony. Hence, this paper selects the Yata gold deposit, Qinglong antimony deposit, Badu gold deposit and Badu antimony deposit in the Youjiang Basin as the research objects. Based on the systematic collection of previous data, LA-ICP MS and SIMS are mainly used to analyze different stages of hydrothermal quartz in typical deposits, supplemented by fluid inclusions and other isotopic tests to accurately determine the source and evolution of ore-forming fluids, and improve the mineralization model in the area. This study has mainly achieved the following understandings。 |
| Pages | 160 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.gyig.ac.cn/handle/42920512-1/10770 |
| Collection | 研究生 |
| Recommended Citation GB/T 7714 | 李锦伟. 右江盆地低温金、锑矿床热液石英显微结构和地球化学特征及 对成矿的指示[D]. 中国科学院地球化学研究所. 中国科学院大学,2019. |
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