They were formed by mixing of the partial melting granitic magma of crust-derived material and mantle-derived basic magma.
岩石主要由幔源岩浆与中下地壳物质部分熔融形成的花岗质岩浆的混合形成的。
2
The Pb isotopic composition of ore sulfides is stable and the ore lead is ordinary common lead. Ore lead derived from magma, which came from partial melting of the upper crust in Early Cretaceous.
矿石铅同位素组成稳定,为正常普通铅,矿石铅来源于早白垩世上地壳物质部分熔融形成的岩浆。
3
Therefore, the magmas were the product of low partial melting of mafic eclogite at the base of the thickened crust, and their magma sources were affected by fluids.