Principles of Lithophile Element Concentration in Silicic Magmas: The Role of Phosphorus

磷可能对体相有重要影响 微量元素在碱中的平衡和分配 铝硅酸盐熔体。 本建议的中心使命是 这项研究是一个实验性的校准分区 熔体和晶石之间的磷系数， 体积组成、体积H2O含量、压力和 温度 其他研究包括（1）蒸汽/熔融 磷、水和碱性铝硅酸盐的分配 （2）磷在含水层中的结构作用 碱性铝硅酸盐玻璃，和（3）数据库的创建 天然菱镁矿中磷含量的测定。 这种 信息也将大大增加我们对 伟晶岩和其他长英质残余岩浆。

Phosphorus may have important effects on the bulk phase equilibria and distributions of trace elements in alkali aluminosilicate melts. The central mission of this proposed study is an experimental calibration of the partition coefficients for phosphorus between melt and feldspars as functions of bulk composition, bulk H2O content, pressure, and temperature. Additional studies include (1) vapor/melt partitioning of phosphorus, H2O, and alkali aluminosilicate components, (2) the structural role of phosphorus in hydrous alkali aluminosilicate glasses, and (3) creation of a data base for phosphorus contents of natural feldspars. This kind of information will also add greatly to our understanding of pegmatites and other felsic residual magmas.