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东秦岭秦岭岩群是一套中深变质结晶岩系，主要由片麻岩、斜长角闪岩、变粒岩和大理岩组成。秦岭岩群中角闪石多具成分环带，由角闪石成分环带确定的ｐＴｔ轨迹由三段组成：①等压升温轨迹，②等压降温轨迹，③降温降压轨迹。同位素年代学表明东秦岭秦岭岩群曾经历晋宁和加里东两个变质旋回，在晋宁旋回晚期形成等压升温轨迹，在加里东旋回早期形成等温降压轨迹，晚期形成降温降压轨迹。
The Qinling Group of the East Qinling Mountains is a set of middle-deep metamorphic crystalline rock series composed mainly of gneiss, amphibolite, granulite and marble. The Qinling Group amphibole amphibole multi-component zone, composed of hornblende zone ring pTt track identified by the three components: ① isobaric warming trajectory, ② isobaric pressure cooling trajectory, ③ cooling buck path. Isotopic chronology shows that the Qinling Group of the Eastern Qinling Mountains experienced two metamorphic cycles of Jinning and Caledonian, formed an isothermal pressure-rising trajectory in the late Jinning cycle, formed an isothermal pressure-relief trajectory early in the Caledonian cycle, and formed a depressurization trajectory in the late stage.