Fluid inclusion and H-O-C isotope geochemistry of the Yaochong porphyry   Mo deposit in Dabie Shan, China: a case study of porphyry systems in   continental collision orogens

doi:10.1007/s00531-013-0982-5

CORC > 北京大学 > 地球与空间科学学院

	Fluid inclusion and H-O-C isotope geochemistry of the Yaochong porphyry Mo deposit in Dabie Shan, China: a case study of porphyry systems in continental collision orogens
	Wang, Pin ; Chen, Yan-Jing ; Fu, Bin ; Yang, Yong-Fei ; Mi, Mei ; Li, Zhong-Lie
刊名	international journal of earth sciences
	2014
关键词	Porphyry Mo deposit Fluid inclusions Stable isotopes CO2-rich high-salinity fluid Dabie Shan Continental collision orogen STOCKWORK MOLYBDENUM DEPOSITS ULTRAHIGH-PRESSURE ECLOGITE EAST CENTRAL CHINA U-PB AGES HENAN PROVINCE TECTONIC IMPLICATIONS METAMORPHIC ROCKS STABLE-ISOTOPE ORE GENESIS LIAONING PROVINCE
DOI	10.1007/s00531-013-0982-5
英文摘要	The Yaochong porphyry Mo deposit in Xinxian County, Henan Province, China, is located in the Hong'an terrane, that is, the western part of the Dabie orogen. The Dabie orogen is part of a > 1,500 km long, Triassic continental collision belt between the North China Block and the South China Block. Four types of vein are present. Paragenetically, from early to late, they are as follows: stage 1 quartz + K-feldspar +/- A pyrite +/- A magnetite vein; stage 2 quartz + K-feldspar + molybdenite +/- A pyrite vein; stage 3 quartz + polymetallic sulfides +/- A K-feldspar vein; and stage 4 quartz +/- A carbonate +/- A fluorite vein. Four compositional types of fluid inclusion, pure CO2, CO2 bearing, aqueous, and solid bearing, are present in quartz from the first three stages; only low-salinity aqueous fluid inclusions occur in quartz from the last stage. All the estimated salinities are a parts per thousand currency sign13.1 wt% NaCl eq., and no halite crystals were identified. Homogenization temperatures for the fluid inclusions from stages 1 to 4 are in the ranges of 262-501, 202-380, 168-345, and 128-286 A degrees C, respectively, and estimated depths decrease from 6.9 to 8.9 km, through 6.2-7.2, to similar to 4.7 km. Quartz separates from the veins yielded a delta O-18 value of 7.7-11.2 aEuro degrees, corresponding to delta O-18(H2O) values of -1.3 to 6.9 aEuro degrees using temperature estimates from fluid inclusion data; delta D-H2O values of fluid inclusion vary from -80 to -55 aEuro degrees, and delta C-13(CO2) from -2.3 to 2.7 aEuro degrees, suggesting that the ore-fluids evolved from magmatic to meteoric sources. We conclude that the ore-forming fluid system at Yaochong was initially high temperature, high salinity, and CO2-rich and then progressively evolved to CO2-poor, lower salinity, and lower temperature, by mixing with meteoric water, which results in ore precipitation.; Geosciences, Multidisciplinary; SCI(E); 5; ARTICLE; yjchen@pku.edu.cn; 3; 777-797; 103
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/215374]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, Pin,Chen, Yan-Jing,Fu, Bin,et al. Fluid inclusion and H-O-C isotope geochemistry of the Yaochong porphyry Mo deposit in Dabie Shan, China: a case study of porphyry systems in continental collision orogens[J]. international journal of earth sciences,2014.
APA	Wang, Pin,Chen, Yan-Jing,Fu, Bin,Yang, Yong-Fei,Mi, Mei,&Li, Zhong-Lie.(2014).Fluid inclusion and H-O-C isotope geochemistry of the Yaochong porphyry Mo deposit in Dabie Shan, China: a case study of porphyry systems in continental collision orogens.international journal of earth sciences.
MLA	Wang, Pin,et al."Fluid inclusion and H-O-C isotope geochemistry of the Yaochong porphyry Mo deposit in Dabie Shan, China: a case study of porphyry systems in continental collision orogens".international journal of earth sciences (2014).