This thesis presents geological, petrological, geochemical, and zircon UPbLuHf 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 (2.642.48 Ga) supracrustal metavolcanic rocks and granitoid gneisses; late Paleoproterozoic (1.721.68 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 (~2.61.2 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 (1.781.62 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 (~2.61.2 Ga) formation and evolution of the lithospheric mantle as well as related crust-mantle geodynamic processes of the Western Liaoning-Northeastern Hebei Provinces

Autorentext

Wei Wang received his Ph.D in June 2014 from the Peking University. His doctoral thesis was nominated as the outstanding doctoral thesis in Peking University. He has gained various awards for the prominent research work, including National Lisiguang Outstanding Doctoral Student (2012, four students/year), and Top Ten Academic doctoral students of Peking University (2013).

Dr. Wang now works at the China University of Geosciences, Beijing as an Associate Professor. He focuses on two major aspects: (1) Archean continental crust formation and evolution as well as crust-mantle geodynamic processes; and (2) Proterozoic supercontinent reconstruction, and related magmatism and crust-mantle geodynamic processes.

Inhalt

Introduction.- Geological background.- Neoarchean basement rock assemblage, crust-mantle interactions and crustal evolution of Western Liaoning Province.- Paleo- to Mesoproterozoic magmatic rock assemblage and crust-mantle geodynamic processes.- Precambrian crustal evolution, lithospheric mantle evolution and crust-mantle geodynamics of Western Liaoning-Northwest Hebei Provinces.- Concluding remarks.