Evolution of Ore Forming Fluid of Daping Gold Deposit in Ailaoshan Tectonic Zone, Southeast Tibet
详细信息
- 责任者：Zhu Luhua (State Key Laboratory of Continental Tectonics and Dynamics ; Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Qi Xuexiang
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(11)
- 关键词：金矿 ; gold ores ; 成矿流体 ; ore-forming fluids ; 青藏高原 ; Qinghai-Tibetan Plateau ; 哀牢山 ; Ailao Mountains
- 页码：p.3395-3408
- 图表：10 illus., 5 tables, 54 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Daping gold deposit is a large quartz-vein gold deposit in Ailaoshan tectonic zone,made of north and south fields. Fluid inclusion homogenization temperatures range from 187 ℃ to 329 ℃ (average is 281 ℃) in north field, and from 168 ℃ to 338 ℃ (average is 264 ℃) in south field, respectively. Corresponding, the δDV-SMOW values range from -70‰ to -81‰ and from -71‰ to -86‰, and the δ18OH2O values rang from 2.9‰ to 9.8‰ and from 3.5‰ to 5.1‰, respectively. All above show, that the ore forming fluids are mixing of postmagmatic solution and underground water, from north to south,deep to shallow fields and from earlier to later stage, the contents of the postmagmatic solution and sulfur are decreasing, and that of the underground water is increasing, and the age of minerallization is youngling,gradually.