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Methane‐rich Fluid of Chaihulanzi Gold Deposit
Author(s) -
ZHANG Yu,
LI Yonggang,
ZHANG Yansheng
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_74
Subject(s) - chinese academy of sciences , beijing , lithosphere , china , zhàng , inner mongolia , geology , library science , history , archaeology , tectonics , seismology , computer science
Methane-rich fluid has appeared in many deposits, and most of them are base-metal deposits, especially in China, such as Baogutu porphyry Cu deposit (Shen et al., 2010), Huogeqi Cu deposit (Zhong et al., 2013) and skarn near Bayan Obo deposit (Fan et al., 2004). CH4, as a common volatile in fluid, has a lower solubility in H2O than CO2 (Naden and Shepherd, 1989), which can dramatically enlarge the pressure-temperature field immiscibility. This nature plays a vital role in deposition of gold, so methanerich fluids in gold deposits need to be paid more attention. Chaihulanzi gold deposit located in western segment of Chifeng-Chaoyang district in the middle part of the northern margin of North China Craton. The orebodies were hosted in the Archean graphite-bearing schist. According to the previous study of ore-forming fluid , We found a lot of CH4-rich fluid inclusions in quartz and we attempted to elucidate the evolutionary history of methane-rich fluids that was responsible for alteration and mineralization of the Chaihulanzi Au deposit with graphite。