摘要
The F-rich granites in South China could be distinguished as the high-p subtype andthe low-p subtype according to their P2O5 contents. There are obvious differences in chemicalcomopition of these two subtypes. The high-p subtype is strongly peraluminous and characterized by low silica and very low REE contents, while the low-p subtype is weakly peraluminousand characterized by high silica and very high REE contents. There are also some differences inchemical compositions of feldspars and micas for these two subtypes. The phosphorus of thehigh-p subtype mainly appears to be in the feldspar structure as PAISi-2 substitution or subordinately in amblygonite as an accessory mineral, while the phosphorus of the low-p subtype ismainly in apatite and other phosphate minerals.
The F-rich granites in South China could be distinguished as the high-p subtype andthe low-p subtype according to their P2O5 contents. There are obvious differences in chemicalcomopition of these two subtypes. The high-p subtype is strongly peraluminous and characterized by low silica and very low REE contents, while the low-p subtype is weakly peraluminousand characterized by high silica and very high REE contents. There are also some differences inchemical compositions of feldspars and micas for these two subtypes. The phosphorus of thehigh-p subtype mainly appears to be in the feldspar structure as PAISi-2 substitution or subordinately in amblygonite as an accessory mineral, while the phosphorus of the low-p subtype ismainly in apatite and other phosphate minerals.
