Some high-P-subtype and low-P-subtype F-rich granites in South China

The F-rich granites in South China could be distinguished as the high-P subtype and the low-P subtype according to their P^sub 2^O^sub 5^ contents. There are obvious differences in chemical composition 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 peraluminous and characterized by high silica and very high REE contents. There are also some differences in chemical compositions of feldspars and micas for these two subtypes. The phosphorus of the high-P subtype mainly appears to be in the feldspar structure as PAISi^sub -2^ substitution or subordinately in amblygonite as an accessory mineral, while the phosphorus of the low-P subtype is mainly in apatite and other phosphate minerals.[PUBLICATION ABSTRACT]