最近,特别注意在时间上和空间上广泛分布于岛弧和大陆边缘的钙碱性系列安山岩的成因。一些新的假说已在实验岩石学和实验地球化学成果的基础上提出来了(cf.Allen等,1972;Kushiro等,1968; Green和Ringwood,1960;Boettcher,1973;Ringwood,1974)。这些安山岩岩浆形成的假说如下:(1)含水地幔橄榄岩部分熔融;(2)俯冲的 Recently, special attention has been paid to the genesis of calc-alkaline series andesite widely distributed in time and space on the island arc and continental margin. Some new hypotheses have been proposed based on experimental petrology and experimental geochemical results (cf. Allen et al., 1972; Kushiro et al., 1968; Green and Ringwood, 1960; Boettcher, 1973; Ringwood, 1974). The hypothesis for the formation of these andesite magmas is as follows: (1) the water-bearing mantle peridotite partially melts; (2) the subducted