There are solvent extraction, ion exchange, vacuum melting, vacuum distillation or sublimation, electro migration and regionalmelting, etc.
主要有溶剂萃取、离子交换、真空熔融、真空蒸馏或升华、电迁移以及区域熔炼等。
2
The metallogenic mechanism is as follows: in the latest Jurassic, the melting layers of granite magma in the lower crust were formed by the regional plate movement.