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
This paper describes a quasi 3-D finite element model of the groundwater flow intwo—aquifer system which is constructed from a sequence of aquifer flow equatio