The magma originated from the upper mantle and belongs to the tholeiiticseries which has undergone immiscible separation of metal sulfide.
岩浆起源于上地幔，属于拉斑玄武岩系列，发生过金属硫化物的熔离作用。
2
Their original rocks are volcanic rocks, epicontinental clastic sedimentary rocks, and ophiolite of volcanic and island arc tholeiiticseries or calcium alkali series.
其原岩岩石类型有火山岩，陆缘碎屑沉积岩，火山、岛弧拉斑系列或钙堿系列火山岩、蛇绿岩等。
3
They include mainly high-alumina basalt, basaltic andesite, a few of andesite and dacite as well, belonging to calc alkaline series but somewhat tholeiiticseries in the early stage.