THE PETROCHEMISTRY AND GEOCHEMISTRY OF RICH-ALKALI GRANITE PORPHYRY IN WESTERN YUNNAN
来源期刊：中南大学学报(英文版)1996年第1期
论文作者：Hu Xiangzhao Wu Xiangbin Luo Xinchang
文章页码：61 - 63
Key words：prophyry; peotrochemistry; geochemistry; Dianxi
Abstract: The characteristics of the chemical composition of the rich-alkali granite porphyries are poor in SiO2, with mean content of 69.19%,but rich in alkali and high in potash. The mean content of (K2O+Na2O) is 9. 85%. K2O is much greater than Na2O, mean value of K2O/Na2O is 2. 10. As shown by the REE analysis, REE contents is lower. Compared with the granite of south China, the rich-alkali granite porphyry hase higher LRF,E, and no anomaly of europium (δEu - 0.87). Its genetic type belongs to A type graritoid.
