位于商丹断裂以北松树沟一带的秦岭群(?)斨饕?石榴)斜长角闪岩/角闪斜长片麻岩组成并保留少量石榴辉石岩透镜体,著名的松树沟纯橄岩体呈透镜状产于其中(图1).研究表明石榴辉石岩是早期高压麻粒岩相变质的代表岩石[1],而(石榴)斜长角闪岩是其退化变质的产物.由于其构造位置的 Qinling Group (?) Gluttonous? Pomegranate) amphibolite / hornblende gneiss in the north of the Shangdan fault zone and a small amount of garnet pyroxene lens body, the famous pine gully pure The pluton is lenticularly produced (Fig. 1). Studies have shown that garnet pyroxenes are the representative rocks of early high-pressure granulitic facies metamorphism [1], whereas (pomegranate) amphibolite is a product of its degenerate metamorphism Due to its construction location