新疆民丰县枯水湖锑矿点矿石特征及成因浅析
Ore Characteristics and Genesis of Sb Ore Deposit in Kushui Lake, Minfeng County, Xinjiang
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摘要: 枯水湖锑矿点位于新疆和田地区民丰县城南东侧约130km、黄羊岭锑矿点南西侧约50km;构造上位于阿尔金断裂(南东侧)、中昆仑断裂带(南西侧)以及郭扎错-西金乌兰湖结合带(北侧)三者交汇复合的三角形区域内。该区成矿地质条件良好、找矿潜力巨大。笔者通过对枯水湖锑矿点野外地质调查及矿石手标本、光片、薄片进行详细观察与鉴定, 查明了野外矿化带分布特征、矿石成分以及矿石主要具有低温热液充填(-交代)作用所形成的组构特征等;并粗略划分出4个成岩(矿)时期和至少1个构造活动期。此外, 对比研究了该锑矿点与相邻的3个锑矿床的成矿地质特征, 初步认为4者应同属一个成矿系统。该锑矿点(床)为受构造(岩浆)活动控制的低温热液充填(交代)型矿点(床)。Abstract: The Sb ore occurrence of Kushui lake is located about 130 km southeast to Minfeng County, and about 50 km southwest to the Huangyangling Sb ore occurrence. Tectonically, the Kushui lake Sb ore occurrence is located in the triangle region of the intersection of Altyn fault(south-east side), Mid-Kunlun fault zone (south-west side), and Guozhacuo-Xijinwulan lake combined belt(north side). The area has favorable ore-forming geological conditions and great prospecting potential. The study clarified the characteristics of field mineralization belt distribution, ore composition, fabric characteristics formed by backfilling(metasomatism) of epithermal solution, and roughly marked out four diagenetic(minerogenetic) periods and at least one tectonic activity period, based on the survey of the field geological investigation, identification of mineral hand samples, thin sections and light sections. In addition, comparative study on mineralization and geological characteristics of the Sb occurrence with the adjacent three Sb deposits were conducted, and it is preliminary concluded that the four deposits should belong to the same metallogenic system. The occurrence is low temperature hydrothermal filling or metasomatism deposit controlled by the tectonic or magmatic activities.
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Key words:
- Sb ore deposit /
- ore fabric /
- deposit genesis /
- Kushui Lake /
- Xinjiang
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