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.