关于冀东-辽西中-晚三叠世具有埃达克质岩石特征的花岗质岩石的源区性质,存在较大争议,且以往对位于其北东向隆起区内的柏杖子岩体的成因研究程度低.对柏杖子花岗质侵入岩进行了系统的年代学、地球化学、Sr-Nd-Hf同位素研究,结果显示:柏杖子岩体结晶年龄为233±3Ma,岩石具有低MgO、Mg~#和Co、Ni、Cr含量;富集大离子亲石元素,亏损高场强元素,显示明显的Pb、Th正异常和Nb、Ta、Ti、P负异常;轻、重稀土元素分馏明显;87Sr/86Sr(t)为0.704 45~0.705 24,ε_(Nd)(t)值为-7.3~-1.7;锆石εHf(t)为-13.4~-5.9.综合分析认为,高Sr/Y比值和低Y含量的柏杖子岩体属于华北克拉通正常厚度镁铁质下地壳熔融的产物,岩石高Sr/Y比值、低Y含量和Nb-Ta负异常特征为继承的华北克拉通下地壳内在性质,并具有与太古宙-古元古代TTG岩石系列相一致的Nb-Ta解耦特征,表明柏杖子岩体源区物质有TTG岩石的贡献;岩石Sr-NdHf同位素组成和低相容元素含量特征同样表明岩浆来源于受改造的下地壳熔融.早中生代玄武岩底侵过程中幔源组分的加入对华北克拉通下地壳形成改造,同时提供热源诱发下地壳物质熔融,形成的熔体向浅表侵位,经历一定程度的斜长石分离结晶,并最终形成柏杖子岩体. There is much controversy over the nature of the source rocks of the granitic rocks characterized by the adakitic rocks in the middle and late Triassic of Jidong-Western Liaoning. In the past, The study on the genesis of Bajizi granitoid intrusive rocks is systematical.Genetic and Sr-Nd-Hf isotope studies show that the Bajizi granitoid is 233 ± 3Ma in age, the rocks have low MgO, Mg ~ # and Co, Ni, Cr contents; enrichment of large ion lithophile elements, loss of high field strength elements, significant positive Pb and Th anomalies and negative Nb, Ta, Ti and P anomalies; (T) is between 0.704 45 and 0.705 24, and the value of ε Nd (t) is between -7.3 and -1.7. The εHf (t) of zircon is between -13.4 and -5.9. According to the comprehensive analysis, it is concluded that the high Sr / The Yazhuang Bazhangzi granitoid with Y and low Y contents belongs to the normal crustal mafic lower crustal melting in North China Craton. The rock high Sr / Y ratio, low Y content and Nb-Ta negative anomaly are inherited under the North China Craton And the Nb-Ta decoupling characteristics consistent with the Archean-Paleoproterozoic TTG series show that there are TTG rocks in the source rocks of the Baizhizi rock; The Sr-NdHf isotopic composition and low-compatible elemental contents also indicate that the magma was derived from the remodeled lower crust. The addition of mantle-derived components to the underlying crust in the Lower Paleozoic basalts altered the formation of the lower crust of the North China Craton and provided a heat source Induced by the melting of the crust material, the formation of the melt emplacement to the superficial, experienced a certain degree of separation and crystallization of plagioclase, and the formation of cypress bar rock body.