Ages, Geochemistry and Metamorphism of Neoarchean Basement in Shandong Province
Focusing on issues of when and how Archean crust in the craton was formed, this PhD thesis book presents major research outcomes of field based metamorphic, geochemical and geochronological investigations on Meso-Neoarchean basement rocks from Shandong Province in the Eastern Block of the North China Craton. Based on major findings and new data, the author proposes that the formation and evolution of Archean crust was governed by mantle plumes, not by plate tectonics. As one of the oldest cratonic blocks in the world containing rocks as old as 3.85 billion years, the formation and evolution of North China Craton is still controversial. Therefore this book will be of value to anyone interested in the evolution of cratonic blocks and Precambrian geology.
Recognizing two Archean crustal growth events at 3.4-3.1 Ga and 2.8-2.7 Ga and one crustal reworking event at 2.6-2.5 Ga in Shandong Province in the North China CratonRevealing a ~2.5 Ga metamorphic event characterized by anticlockwise P-T paths involving isobaric cooling following the peak granulite-facies metamorphismFor the first time applying a mantle plume model to the growth and evolution of Neoarchean crust in the study area