Archean-Mesoproterozoic Crustal Evolution and Crust-Mantle Geodynamics of Western Liaoning-Northeastern Hebei Provinces, North China Craton
Buch in deiner Nähe kaufen
Beschreibung
This thesis presents geological, petrological, geochemical, and zircon U–Pb–Lu–Hf isotopic field data for representative Precambrian lithologies in the Western Liaoning-Northeastern Hebei Provinces along the northern margin of the North China Craton (NCC). It describes late Neoarchean (2.64–2.48 Ga) supracrustal metavolcanic rocks and granitoid gneisses; late Paleoproterozoic (1.72–1.68 Ga) Jianping alkaline plutons and Pinggu alkaline volcanic rocks; and newly discovered ~1.23 Ga mafic dykes. The nature of magma sources and genesis of each magmatic episode are investigated, and the Precambrian (~2.6–1.2 Ga) lithospheric mantle evolution and crust-mantle interaction processes are established for the first time –aspects that provide important constraints in our understanding of the Precambrian crustal evolution and geodynamic processes in the region studied.
This thesis presents geological, petrological, geochemical, and zircon U–Pb–Lu–Hf isotopic field data for representative Precambrian lithologies in the Western Liaoning-Northeastern Hebei Provinces along the northern margin of the North China Craton (NCC). It describes late Neoarchean (2.64–2.48 Ga) supracrustal metavolcanic rocks and granitoid gneisses; late Paleoproterozoic (1.72–1.68 Ga) Jianping alkaline plutons and Pinggu alkaline volcanic rocks; and newly discovered ~1.23 Ga mafic dykes. The nature of magma sources and genesis of each magmatic episode are investigated, and the Precambrian (~2.6–1.2 Ga) lithospheric mantle evolution and crust-mantle interaction processes are established for the first time –aspects that provide important constraints in our understanding of the Precambrian crustal evolution and geodynamic processes in the region studied.
Establishes Neoarchean subduction-related crust-mantle geodynamic regimes for Western Liaoning Province, North China Craton (NCC) Proposes island arc subduction and arc-continent accretion as major regimes of late Neoarchean continental growth in the Eastern Block of the North China Craton Explores the genesis and crust-mantle geodynamic processes for late Paleoproterozoic (1.78–1.62 Ga) extension-related magmatism in the North China Craton Identifies large-scale ~1.23 Ga mafic dykes within the NCC, and reconstructs the paleogeographic position of the NCC within the global Paleo- to Mesoproterozoic Columbia supercontinent Discusses for the first time the Precambrian (~2.6–1.2 Ga) formation and evolution of the lithospheric mantle as well as related crust-mantle geodynamic processes of the Western Liaoning-Northeastern Hebei Provinces
Autor*in
Wei Wang
Themen in »Archean-Mesoproterozoic Crustal Evolution and Crust-Mantle Geodynamics of Western Liaoning-Northeastern Hebei Provinces, North China Craton«
North China Craton Western Liaoning-Northeastern Hebei province Late Archean-Mesoproterozoic Crustal and lithospheric mantle evolution Crustal-mantle geodynamics Archean plate tectonics