Whole-rock major and trace elements and Hf isotopes of magmatic zircons of tonalite–trondhjemite–granodiorite (TTG) rocks with different ages (2.9, 2.7 and 2.5 Ga) from the three blocks (the Eastern Block, Western Block and Trans-North China Orogen) of the North China Craton were compiled to investigate their respective petrogenesis, tectonic setting and implications for crustal growth and evolution. Geochemical features of the 2.5 Ga TTGs of the Eastern Block require melting of predominant rutile-bearing eclogite and subordinate garnet-amphibolite at higher pressure, while the source material of the 2.7 Ga TTGs is garnet-amphibolite or granulite at lower pressure. The 2.5 Ga TTGs have high Mg#, Cr and Ni, negative Nb–Ta anomalies and a juvenile basaltic crustal source, indicating derivation from the melting of a subducting slab. In contrast, features of the 2.7 Ga TTGs suggest generation from melting of thickened lower crust. The 2.5 and 2.7 Ga TTGs in the Trans-North China Orogen were formed at garnet-amphibolite to eclogite facies, and the source material of the 2.5 Ga TTGs in the Western Block is most likely garnet-amphibolite or eclogite. The 2.5 Ga TTGs in the Trans-North China Orogen and Western Block were generated by the melting of a subducting slab, whereas the 2.7 Ga TTGs in the Trans-North China Orogen derived from melting of thickened lower crust. The Hf isotopic data suggest both the 2.5 and 2.7 Ga TTG magmas were involved with contemporary crustal growth and reworking. The two-stage model age (TDM2) histograms show major crustal growth between 2.9 and 2.7 Ga for the whole North China Craton.

中文翻译：

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华北克拉通不同地块太古代TTG两期岩浆对比研究：成因与地壳演化制约

东、西、华北三个区块不同年龄（2.9、2.7、2.5 Ga）的英云长岩-长长花岗岩-花岗闪长岩（TTG）岩浆锆石全岩主微量元素和Hf同位素汇编了华北克拉通的造山带，以研究它们各自的岩石成因、构造环境以及对地壳生长和演化的影响。东块 2.5 Ga TTGs 的地球化学特征要求主要的含金红石榴辉岩和次要的石榴石-角闪岩在较高压力下熔融，而 2.7 Ga TTGs 的源材料是较低压力下的石榴石-角闪岩或麻粒岩。2.5 Ga TTG 具有高 Mg#、Cr 和 Ni，负 Nb-Ta 异常和幼年玄武质地壳源，表明源自俯冲板片的熔融。相比之下，2.7 Ga TTG 的特征表明是由增厚的下地壳熔融产生的。华北造山带2.5和2.7 Ga TTG形成于石榴石-闪闪岩至榴辉岩相，西部陆块2.5 Ga TTG的物源多为石榴石-角闪岩或榴辉岩。华北造山带和西部地块的 2.5 Ga TTGs 是由俯冲板片的熔融产生的，而华北造山带的 2.7 Ga TTGs 则来自加厚的下地壳的熔融。Hf 同位素数据表明 2.5 和 2.7 Ga TTG 岩浆都与当代地壳生长和改造有关。两阶段模型时代（T 华北造山带 7 Ga TTG 形成于石榴石-闪闪岩至榴辉岩相，西部陆块 2.5 Ga TTG 的物源多为石榴石-闪闪岩或榴辉岩。华北造山带和西部地块的 2.5 Ga TTGs 是由俯冲板片的熔融产生的，而华北造山带的 2.7 Ga TTGs 则来自加厚的下地壳的熔融。Hf 同位素数据表明 2.5 和 2.7 Ga TTG 岩浆都与当代地壳生长和改造有关。两阶段模型时代（T 华北造山带 7 Ga TTG 形成于石榴石-闪闪岩至榴辉岩相，西部陆块 2.5 Ga TTG 的物源多为石榴石-闪闪岩或榴辉岩。华北造山带和西部地块的 2.5 Ga TTGs 是由俯冲板片的熔融产生的，而华北造山带的 2.7 Ga TTGs 则来自加厚的下地壳的熔融。Hf 同位素数据表明 2.5 和 2.7 Ga TTG 岩浆都与当代地壳生长和改造有关。两阶段模型时代（T 华北造山带7 Ga TTGs来源于加厚下地壳的熔融。Hf 同位素数据表明 2.5 和 2.7 Ga TTG 岩浆都与当代地壳生长和改造有关。两阶段模型时代（T 华北造山带7 Ga TTGs来源于加厚下地壳的熔融。Hf 同位素数据表明 2.5 和 2.7 Ga TTG 岩浆都与当代地壳生长和改造有关。两阶段模型时代（TDM2) 直方图显示整个华北克拉通的主要地壳生长在 2.9 和 2.7 Ga 之间。