论文部分内容阅读
This paper reviews the types, homogenization temperatures, salinities, compositions, boilingand formation mechanisms of inclusions in porphyry copper (molybdenum) depositi of China. Inaddition, it discusses, in particular, pH conditions during quartz sericitization and potash-silicatealteration. If the homogenization temperatures, KCl and NaCl concentrations and chemical composi-tions of K-feldspar and sericite are obtained, pH and a_(K~+)can be worked out with the equilibrium equations and expressions. Research on the Yulong, Malasongduo and Dexing porphyry copper (molybdenum) depositsreveals that at the stage of quartz sericitization, potash silicate alteration and ore deposition, theactivity values of K’ in ore solutions are 0.1-25 mole, averaging 0.67 mole, and pH values rangefrom 4.0-4.7.
This paper reviews the types, homogenization temperatures, salinities, compositions, boiling and formation mechanisms of inclusions in porphyry copper (molybdenum) depositi of China. Inaddition, it discusses, in particular, pH conditions during quartz sericitization and potash-silicate integration. Research on the Yulong, Malasongduo and Dexing porphyry copper (molybdenum), KCl and NaCl concentrations and chemical composi- tions of K-feldspar and sericite are obtained, pH and a_ (K ~ +) can be worked out with the equilibrium equations and expressions. ) depositsreveals that at the stage of quartz sericitization, potash silicate alteration and ore deposition, theactivity values of K ’in ore solutions are 0.1-25 mole, averaging 0.67 mole, and pH values rangefrom 4.0-4.7.