Anatexis of late Neoarchean-Early Paleoproterozoic and late Paleoproterozoic garnet-bearing leucogranite from the Khondalite Belt in the North China Craton

Two episodes of late Neoarchean-early Paleoproterozoic and garnet-bearing leucogranite, named the Baotou Jining–Liangcheng leucogranite are recognized from Khondalite Belt in North China Craton. Geochemical studies show that has high Al2O3 content FeOT/MgO ratio, with a large variation CaO K2O/Na2O ratio. Additionally, is enriched light rare earth elements ion lithophile depleted Nb, Ta, P, Ti. However, there some variations Eu anomalies, as indicated by Eu-enriched Eu-depleted patterns. The sensitive high-resolution microprobe (SHRIMP) zircon U-Pb dating their anatectic ages were 2.35–2.43 Ga 1.90–1.92 Ga, respectively, ?Hf (t) values ?0.01–3.93 ?4.36–1.99, two-stage model (TDM2) 2.76–3.02 2.57–2.83 respectively. U-Th-Pb SHRIMP analyses on reveal ca. 2.35–2.47 for metapelite gneiss 1.90–1.91 gneiss, which represent tectonic metamorphic events related to anatexis. Our results, combined geological petrographical observations, geochemistry, geochronology, suggest (1) Garnet-bearing leucogranites formed result anatexis gneisses; (2) They mixtures leucosomes, residual minerals mantle-derived materials; (3) have been identified; (4) Both two corresponded Palaeoproterozoic tectonothermal events,