Rare element mineralized granites of the Yanshan period in Southern China are characterized by highcontents of SiO<sub>2</sub>,Na<sub>2</sub>O,O,K<sub>2</sub>O,
On the basis of a worldwide review of Claraia,Pseudoclaraia andEumorphotis,especially their important species,two range zones are recog-nized:the Pseudoclaraia