The mystery lies in the origin of their magma, or molten rock within the Earth.

关于岩浆或熔融岩石起源是地球内部的奥秘。

youdao

The earlier units contain abundant mafic micro-enclaves, and the petrographic study of the enclaves indicates the crust-mantle mixing origin of the granitic magma.

较早次单元中富含镁铁质微粒包体，经包体岩相学研究，花岗岩浆具壳幔混合成因。

youdao

This paper researches into magma origin and minerogenetic geotectonic background of porphyry in the Gonpoquan copper ore district.

探讨了公婆泉矿区斑岩岩浆起源，论述了该矿区斑岩成岩成矿大地构造背景。

youdao