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Geochemistry of Adakitic Rocks from the Shaxi Porphyritic Copper (Gold) Deposit, Central Anhui: Significance for Mineralization
Author(s) -
DENG Jianghong,
YANG Xiaoyong
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 - 10.1111/1755-6724.12374_6
Subject(s) - porphyritic , crust , geochemistry , china , mantle (geology) , geology , mineralization (soil science) , history , archaeology , paleontology , quartz , soil water , soil science
The Lower Yangtze River Belt (LYRB) is economically one of the most important metallogenic belts in China, with more than 200 polymetallic (Cu–Fe–Au, Mo, Zn, Pb, Ag) deposits (Chang et al., 1991). Field investigations and chronological studies reveal that these deposits are closely associated, both spatially and temporally, with Early Cretaceous intermediate to felsic calc-alkaline intrusions (Xie et al., 2012; Xie et al., 2009). Geochemical studies further show that the host intrusions of porphyry Cu-Au deposits exhibit some distinctive compositional characteristics resembling modern adakites at convergent plate margins (Wang et al., 2006; Xie et al., 2009),as originally defined by Defant and Drummond (1990). What is the genesis of the adakitic rocks associated with the porphyritic Cu (Au) deposit in Shaxi? It is still need consideration. This paper focuses on the petrology and geochemistry of the Au-bearing porphyritic copper deposit to better understand metallogenic processes and associated intrusive bodies.