According to field investigation,the Yingfeng rapakivi granite is formed in mid-Proterozoic and located between shear belts as a lentiform in the structural belt of north margin of Qaidam basin.

• 野外调查表明,鹰峰环斑花岗岩体形成于中元古代,位于柴北缘构造带,呈透镜状夹持在剪切带间。