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Fluid Inclusion Characteristics of the Dajinshan W‐Sn Polymetallic Deposit in Yunfu, Guangdong Province
Author(s) -
YU Zhangfa,
ZHANG Zhiqiang,
CHEN Maohong,
ZHAO Haijie
Publication year - 2014
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12379_64
Subject(s) - beijing , metallogeny , china , chinese academy of sciences , geology , mining engineering , library science , geochemistry , archaeology , geography , sphalerite , computer science , pyrite
quartz-vein type ore deposit located in western Guangdong Province. The ore bodies show a fairly simple shape and mainly occurred as tungsten-tin polymetallicbearing sulfide quartz veins, including quartz vein, quartzgreisen and sulfide-quartz veins, and the distribution of the ore bodies is spatially related to Dajinshan granitoids. The formation of the deposit experienced three stages: wolframite-molybdenite-quartz stage, wolframitecassiterite-sulphide-quartz stage and fluorite-calcitecarbonate stage. Based on detailed petrographic observations, this paper carried out microthermometric and Raman microspectroscopic studies of fluid inclusions formed at different ore-forming stages in the Dajinshan tungsten-tin polymetallic deposit. There are four dominant types of fluid inclusions, namely aqueous two-phase inclusions, CO2-bearing inclusions, daughter mineralbearing inclusions and gas-rich inclusions. The gas compositions of ore-forming fluids in the Dajinshan tungsten-tin polymetallic deposit are mostly CO2, CH4 and H2O. The hydrogen, oxygen and sulfur isotopic data imply that the ore-forming fluids in the Dajinshan tungsten-tin polymetallic deposit were mainly derived from magmatic fluids, mixed with meteoric water in the process of oreforming. The results above indicate that the fluid mixing and boiling led to the decomposition of the metal complex in ore forming fluids and ore deposition.