Evolution of ore forming fluid of Daping gold deposit in Ailaoshan tectonic zone, Southeast Tibet

CORC > 中国地质调查局 > 中国地质调查局

	Evolution of ore forming fluid of Daping gold deposit in Ailaoshan tectonic zone, Southeast Tibet
	Zhu, LH (Zhu LuHua); Qi, XX (Qi XueXiang); Peng, SB (Peng SongBai); Li, ZQ (Li ZhiQun)
刊名	ACTA PETROLOGICA SINICA
	2011
卷号	27 期号:11 特刊 SI 页码:3395-3408
关键词	Fluid inclusions Hydrogene and oxygen isotopic compositions Sulfur isotopic compositions Daping gold deposit Ailaoshan tectonic zone
ISSN号	1000-0569
英文摘要	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 degrees C to 329 degrees C (average is 281 degrees C) in north field, and from 168 degrees C to 338 degrees C (average is 264 degrees C) in south field, respectively. Corresponding, the delta D(V-SMOW) values range from -70 parts per thousand to -81 parts per thousand and from -71 parts per thousand to -86 parts per thousand, and the delta(18)O(H2O) values rang from 2. 9 parts per thousand to 9. 8 parts per thousand and from 3. 5 parts per thousand to 5. 1 parts per thousand, respectively. All samples plotted at the field between magmatic water and underground water in the plots of delta D vs. delta(18)O(H2O), and that for north field are near magmatic water area, and for south field are near underground water area. The sulfur isotopic compositions (delta(34)S) for north and south fields are 0. 7 parts per thousand similar to 15. 5 parts per thousand and 10. 6 parts per thousand similar to 15. 8 parts per thousand, respectively. The vapour compositions in fluid inclusions are H(2)O, CO(2) and N(2), with a little of CH(4), C(2)H(2), C(2)H(4), C(2)H(6), and CO. The ion compositions in fluid inclusions are K(+), Na(+), Ca(2+), Cl(-) and SO(4)(2-), with a little of NO(3)(-), F(-), Br(-) and Mg(2+). ESR dating data for quartz in gold-bearing quartz veins from north and south fields are 27. 2 similar to 29. 1 Ma and 17. 3 similar to 22. 1Ma, 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.
学科主题	矿床地质
WOS关键词	DUCTILE SHEAR ZONE ; YUNNAN PROVINCE ; ISOTOPIC COMPOSITIONS ; METAMORPHIC BELT ; STABLE ISOTOPE ; QUARTZ VEINS ; NOBLE-GASES ; INDO-CHINA ; SHAN ; INCLUSIONS
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000297822900019
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39424]
专题	中国地质调查局
作者单位	Yunnan Bur Nonferrous Geol, Kunming 650051, Peoples R China
推荐引用方式 GB/T 7714	Zhu, LH ,Qi, XX ,Peng, SB ,et al. Evolution of ore forming fluid of Daping gold deposit in Ailaoshan tectonic zone, Southeast Tibet[J]. ACTA PETROLOGICA SINICA,2011,27(11 特刊 SI):3395-3408.
APA	Zhu, LH ,Qi, XX ,Peng, SB ,&Li, ZQ .(2011).Evolution of ore forming fluid of Daping gold deposit in Ailaoshan tectonic zone, Southeast Tibet.ACTA PETROLOGICA SINICA,27(11 特刊 SI),3395-3408.
MLA	Zhu, LH ,et al."Evolution of ore forming fluid of Daping gold deposit in Ailaoshan tectonic zone, Southeast Tibet".ACTA PETROLOGICA SINICA 27.11 特刊 SI(2011):3395-3408.