By Meiling Wu
Focusing on problems with whilst and the way Archean crust within the craton used to be shaped, this PhD thesis booklet provides significant study results of box established metamorphic, geochemical and geochronological investigations on Meso-Neoarchean basement rocks from Shandong Province within the jap Block of the North China Craton. in accordance with significant findings and new info, the writer proposes that the formation and evolution of Archean crust was once ruled by way of mantle plumes, no longer by means of plate tectonics. As one of many oldest cratonic blocks on this planet containing rocks as outdated as 3.85 billion years, the formation and evolution of North China Craton continues to be debatable. for that reason this ebook should be of price to a person attracted to the evolution of cratonic blocks and Precambrian geology.
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Additional resources for Ages, Geochemistry and Metamorphism of Neoarchean Basement in Shandong Province: Implications for the Evolution of the North China Craton
2000a, b), which are generally consistent with tectonic settings related to subduction and collision. 5 Ga TTG gneisses, separated by linear supracrustal rocks belts (Zhao et al. 2001). Many domiform batholiths are composed chiefly of TTG gneisses that generally underwent upper greenschist to granulite facies metamorphism, with quartz monzonites in amphibolite facies areas or charnockites in granulite facies areas as the cores of domes (Zhao et al. 2001). The Paleoproterozoic Jiao-Liao-Ji Belt (JLJB) lies in the Eastern Block in NE–SW direction, with its southern segment extending across the Bohai Sea into the Eastern Shandong Complex and its northern segment between the Northern Liaoning–Southern Jilin Complex and the Southern Liaoning–Nangrim Complex (Fig.
2003). Activity–composition relations for phases in petrological calculations: An asymmetric multicomponent formulation. Contributions to Mineralogy and Petrology, 145, 492–501. Jahn, B. , & Kröner, A. (1984). Multi-chronometric ages and origin of Archaean tonalitic gneisses in Finnish Lapland: A case for long crustal residence time. Contributions to Mineralogy and Petrology, 86, 398–408. Jahn, B. , et al. (1988). Archean crustal evolution in China: The Taishan complex, and evidence for juvenile crustal addition from longterm depleted mantle.
Chemical Geology, 261, 155–171. , & Powell, R. (2007). An order–disorder model for omphacitic pyroxenes in the system jadeite–diopside–hedenbergite–acmite, with applications to eclogite rocks. American Mineralogist, 92, 1181–1189. Guo, J. , O’Brien, P. , & Zhai, M. G. (2002). High-pressure granulites in the Sanggan area, North China Craton: Metamorphic evolution, P–T paths and geotectonic signiﬁcance. Journal of Metamorphic Geology, 20, 741–756. Guo, J. , Chen, F. , & Zhai, M. G. (2005). Sm-Nd and SHRIMP U-Pb zircon geochronology of high-pressure granulites in the Sanggan area, North China Craton: Timing of Paleoproterozoic continental collision.
Ages, Geochemistry and Metamorphism of Neoarchean Basement in Shandong Province: Implications for the Evolution of the North China Craton by Meiling Wu