俄罗斯Eldjurti花岗岩体的岩浆演化规律

Ｅｌｄｊｕｒｔｉ岩体是俄罗斯境内高加索地区阿尔卑斯造山活动晚期形成的黑云母花岗岩体经对生成环境和岩浆在垂直方向上的演化特征研究表明，Ｅｌｄｊｕｒｔｉ花岗岩浆在上升侵位之前已开始结晶分异，大部分造岩矿物的中心部分是在岩浆上升侵位之前结晶生长的。

THE FORMING CONDITION OF ELDJURTI GRANITE AND MAGMA EVOLUTION

Eldjurti granite sited at the belt of Alpine magma-tectonic movement in Caucasus,Russia .It has been drilled from its upper part to depth nearly 5000 m.The granite forming condition and magma evolution have demonstrated: Eldjurti granite magma began to crystallize before its intrusion upward, most of the centre part of the rock-forming mineral crystallized before magma intrusion; the physico-chemical condition of granite-formation related to the depth on which the magma was hosted: the upper part of massive formed on the anhydrous, and high-temperature condition, whereas the lower part crystallized under a hydrous, low-tewperature condition; because of the heterogneity of magma differentiation in magma chamber, the temperature of magma crystallization and the content of fluid is not homogeneous by vertical section.