Reply to “ Can Partial Melting of the Hydrous Intermediate-Basic Lower Continental Crust Generate C-type Adakites? ”
Chao Zhang
Abstract
Chao Zhang
Abstract
We reply here to the comments of Jiao et al.on our previous paperPartial Melting of Hydrous Lower Continental Crust: Discussion on the Petrogenesis of C-Type Adakites From the Dabie Orogen.We propose that(1) the protoliths of the C-type adakites from the Dabie orogen might have a basic composition with SiO2 content of ca.50%,but more accurate estimation is to be investigated,(2) partial melting of amphibolite at 1.0~1.2 GPa(corresponding to a depth of 35~40 km) can result in residues containing ≥20% garnet,and(3) medium-potassium amphibolitic protolith(ca.1% K2O) can generate high-K calc-alkaline felsic melts with K2O content of 3.5%~5%.
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We reply here to the comments of Jiao et al.on our previous paperPartial Melting of Hydrous Lower Continental Crust: Discussion on the Petrogenesis of C-Type Adakites From the Dabie Orogen.We propose that(1) the protoliths of the C-type adakites from the Dabie orogen might have a basic composition with SiO2 content of ca.50%,but more accurate estimation is to be investigated,(2) partial melting of amphibolite at 1.0~1.2 GPa(corresponding to a depth of 35~40 km) can result in residues containing ≥20% garnet,and(3) medium-potassium amphibolitic protolith(ca.1% K2O) can generate high-K calc-alkaline felsic melts with K2O content of 3.5%~5%.
Key concepts: Adakite, Protolith, Felsic, Geology, Partial melting, Petrogenesis, Continental crust, Geochemistry