The magma originated from the upper mantle and belongs to the tholeiitic series 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
It was shown that the amphibolite was transformed from oceanic tholeiitic basalts and the leptynite was converted from acidic sedimentary rocks.
结果表明，该区的斜长角闪岩是由大洋拉斑玄武岩变质而成，变粒岩则是由酸性沉积岩变质而成。
3
Their original rocks are volcanic rocks, epicontinental clastic sedimentary rocks, and ophiolite of volcanic and island arc tholeiitic series or calcium alkali series.