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Gold Ore Deposits in the Gezhen Metallogenic Belt, Hainan Province of South China: An Example of Orogenic‐Type Deposit?
Author(s) -
ZHOU Yueqiang,
HOU Maozhou,
XU Deru,
SHAN Qiang,
HU Guocheng,
YU Liangliang,
ZHANG Jianling,
WU Chuanjun
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 - 10.1111/1755-6724.12371_32
Subject(s) - metallogeny , chinese academy of sciences , beijing , china , geochemistry , geology , archaeology , geography , sphalerite , pyrite
As one of the most important gold metallogenic belts in South China, Gezhen gold metallogenic belt has proven and measured resources of about 275t, and accounts for 80% of the Au production in Hainan Province. Gold ore deposits within this belt, which include Tuwaishan, Baoban, Erjia (composed of Beiniu, Fengshuishan and Hongfumenling mines), Hongquan and Bumo deposits from northeast to southwest, are all situated in the Gezhen shear zone and show an equidistant occurrence (Fig. 1). The Mesoproterozoic Baoban Group (1600 ~ 1800 Ma) is the main host unit for these gold deposits (Ma et al., 1997), which are controlled strictly by the NE-trending shear zone. Three types of gold mineralization, namely, altered mylonite-type, altered cataclastic rock-type and quartz vein -type, are identified from the core of ductile shear zones to rim. They are controlled by mylonitic foliation (e.g., SC fabrics), NE-trending altered cataclastic rock belts and the secondary brittle shearand interlayer fracture zone, respectively.