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新的独居石U-Pb同位素数据表明,阿伯丁的“S”型花岗岩的侵位年龄为470±1Ma、该花岗岩体是在格拉姆期(加里东早期)造山运动晚期、于围岩达拉德组(Dalradian)角闪岩相变质高峰之后侵位的.从相关的脉状杂岩的野外关系来看,上述同位索年龄值也确定了达拉德超群(Daradian Supergroup)的局部D3变形发育的年代.以前发表的同位素年龄数据表明,这一花岗岩体主要起源于变质沉积物的熔融,而这些变质沉积物的最小地壳停留时间大约为1.2-1.8Ga.具有类似同位素特征的岩石形成了花岗岩体的混合岩化的围岩外壳,因此我们推测,岩体侵位深度(17～20km)之下不远的岩石具有广泛的同期熔融作用.
The new monazite U-Pb isotope data show that the “S” granite of Aberdeen has an invaded age of 470 ± 1Ma, which was developed late in the ornithogalum (early Caledonian) orogeny, The emplacement occurred after the Dalradian amphibolite facies metamorphic peak.The above epicenter age values also identified a part of the Daradian Supergroup from the field relationships of the related vein complexes D3 Deformation Age Previously published isotopic age data indicate that this granite mainly originated from the melting of metamorphic sediments that have a minimum crustal residence time of approximately 1.2-1.8 Ga Rocks with similar isotopic characteristics Forming a mixed petrified shell of the granite body. Therefore, we speculate that the rocks not far from the emplacement depth of the rock mass (17 ~ 20km) have a wide range of simultaneous melting.