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Origin of giant post‐collisional porphyry Cu metallogenic belt in southern Tibet: constrains from magmatic H2O, f O2, and S
Author(s) -
Wang Rui,
Hou Zengqian,
Richards Jeremy P.,
Yang Zhiming,
Zhu Dicheng
Publication year - 2019
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 - 10.1111/1755-6724.14060
Subject(s) - geology , geochemistry
Porphyry copper deposits (PCDs) are generally associated with oxidized, and H2O-S-rich magmas, typical features of magmatic arcs (Richards, 2003; Sillitoe, 2010). In island arcs and continental arcs, where porphyry deposits form, it is generally thought that oxidized, sulphur-rich fluids released from subducting slabs migrate into the asthenospheric mantle wedge, where they cause partial melting and mobilization of metals (Richards, 2003), and ultimately transfer these metals into the crust. Recently, large porphyry copper deposits (PCDs) have been found in association with post-collisional (Miocene; 22–12 Ma), highSr/Y granitoid plutons emplaced in the eastern section of the Paleocene-Eocene Gangdese magmatic arc in the Himalayan-Tibetan orogenic belt (Hou et al., 2004, 2015; Yang et al., 2009; Wang et al., 2018). These discoveries raise questions about the nature of magmatic and metallogenic processes during continental collision.