红格岩体下部岩相带以含量高达5%~15%的角闪石为特征,局部金云母的含量可达8%,而且这些角闪石和金云母的结构构造及其地球化学特征都表明其是直接从幔源基性岩浆中结晶形成的原生矿物(栾燕等,2014)。含水矿物角闪石和金云母的大量出现,表明红格岩体下部岩相带母岩浆富含水分,Sr-Nd同位素特征指示这些水是母岩浆在混染底板变质砂岩的过程中加入的(Luan et al.,2014)。实验研究表明,玄武质岩浆中水的加入会降低液相线和固相线温度,并且明显改变矿物的结晶顺 The lithofacies belt in the lower part of the red rock body is characterized by amphibole with the content of up to 5% ~ 15%, the content of local phlogopite is up to 8%, and the structural structure and geochemical characteristics of these amphiboles and phlogopite both indicate It is a primary mineral crystallized directly from mantle-derived mafic magma (Luan Yan et al., 2014). The abundant occurrences of hornblende and phlogopite in aquifer indicate that the magma in the lower lithofacies is rich in water and the Sr-Nd isotopes indicate that these water were added during the process of mixing mother-bearing magma with metamorphic sandstones (Luan et al., 2014). Experimental studies show that the addition of water to basaltic magma decreases the temperature of the liquidus and solidus, and significantly changes the crystallinity of the minerals