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Fluid Inclusion Study of the Yejiwei Cu‐Sn Porphyry Deposit in Hunan Province
Author(s) -
YUAN Yabin,
YUAN Shunda,
LIU Xiaofei,
Yisa Xuan
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_65
Subject(s) - beijing , metallogeny , china , chinese academy of sciences , inclusion (mineral) , mineral resource classification , geochemistry , geology , mining engineering , geography , archaeology , mineralogy , sphalerite , pyrite
The ore concentration area of southern Hunan Province is a typical district at home and abroad which is mainly rich in W and Sn (Mao et al., 2007). The regional largescale ore-forming incident which occurred within relatively short time in middle-late Jurassic caused extensive attention. Many studies used to discuss the formation mechanism of W-Sn polymetallic deposits among greisen, skarn and lode types (Yuan et al., 2012). However, the tin polymetallic porphyry deposit which is also important in the region is ignored. The Yejiwei Sn-Cu polymetallic deposit is a typical and large porphyry deposit in southern Hunan Province, even rare in China. It’s the largest tin porphyry deposit in the region which has tin metal reserves of more than 110,000 t and Cu 66,000 t (Li et al., 2013). It has not been well understood that the kind of ore-forming elements in the deposit which mainly contains copper and tin is much different from the other deposits mainly rich in W and Sn in Dongpo orefield and even the region. The characteristics of the ore-forming fluid is a clue to find out the genetic relationship between W-Sn mineralization and Sn-Cu mineralization. The aim of this paper is to discuss the evolution of ore-forming process in Yejiwei using fluid inclusion from quartz porphyry and ore samples by the methods of inclusion petrography, microthermometry and laser Raman spectrometry.