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• W4281294740 endingPage "106732" @default.
• W4281294740 startingPage "106732" @default.
• W4281294740 abstract "• Neoarchean Suizhong granitic belt is mainly composed of K-rich granitoids. • These Neoarchean K-rich granitoids are intracrustal reworking products. • They resemble magmatism in Phanerozoic collisional orogenic belts. • Suizhong granitic belt was generated during micro-continental collision. • Crustal maturation and cratonization of the NCC was preliminarily achieved through collision. The late Archean (3.0–2.5 Ga) is a pivotal period, when properties of the continental crust significantly changed and a fundamental shift of geodynamic processes took place. As the major felsic component in early Archean (> 3.0 Ga) crustal records, tonalite-trondhjemite-granodiorite (TTG) suites are compositionally different to the present-day felsic upper continental crust. But it remains unclear how and to what degree the felsic part of the continental crust evolved during the late Archean. The 250 km long Neoarchean Suizhong granitic belt in the North China Craton (NCC) is mainly composed of K-rich granitoids and compositionally distinct to the TTG-dominated early Archean upper continental crust. This belt is a natural laboratory to explore how the early Archean upper continental crust evolved in the late Archean. Combined with our new data (zircon U-Pb ages, bulk-rock geochemistry and zircon Hf isotopes), we provide an overview of the temporal and compositional features of the Neoarchean Suizhong granitic belt. Granitic magmatism in the Suizhong granitic belt mainly took place within 100 Myrs around the end of the Archean, and these rocks are primarily K-rich granitoids with minor TTGs and mafic magmatic enclaves (MMEs). The K-rich granitoids include sanukitoid-like granites and potassic granites; the former are hybrids between melts from Mesoarchean enriched mafic crust and enriched mantle, and the latter are melts from Hadean–Mesoarchean crustal lithologies. The volumetrically minor TTGs were sourced from Mesoarchean low-K mafic crust. MMEs are either cumulates or inclusions of captured enriched mantle melts. Overall, these Neoarchean granitoids are essentially intracrustal reworking products of ancient continental nuclei and are compositionally and temporally similar to syn- and post-collisional magmatism in Phanerozoic collisional orogenic belts. The Neoarchean crustal reworking process was most likely to be induced by amalgamation of micro-continents through collision. Through the collision-induced reworking, a variety of K-rich granitoids were introduced to the Neoarchean upper continental crust. As a result, layering of felsic upper and mafic lower crust was developed, and the maturity of Archean continental crust was significantly enhanced. Collisional orogenesis played a critical role in maturing the Archean continental crust and initial cratonization of the NCC during the late Archean." @default.
• W4281294740 created "2022-05-24" @default.
• W4281294740 creator A5047406774 @default.
• W4281294740 creator A5055838753 @default.
• W4281294740 creator A5057351329 @default.
• W4281294740 creator A5062378509 @default.
• W4281294740 date "2022-08-01" @default.
• W4281294740 modified "2023-10-16" @default.
• W4281294740 title "Crustal maturation and cratonization in response to Neoarchean continental collision: The Suizhong granitic belt, North China Craton" @default.
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