[1] CAS, Inst Geol & Geophys, Key Lab Gas Geochem, Lanzhou 730000, Peoples R China
[2] Hiroshima Univ, Dept Earth & Planetary Syst, Higashihiroshima 7398526, Japan
[3] CAS, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China