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	Komatiites from west Shandong, North China craton: Implications for plume tectonics
	Cheng, Suhua ; Kusky, Timothy
	2007
关键词	komatiites Mengyin North China craton Archean GREENSTONE-BELT FLOOD BASALTS MANTLE PLUME EVOLUTION GEOCHEMISTRY CONSTRAINTS GROWTH HEADS
英文摘要	The Mengyin komatiites are located at the base of the Taishan Complex (similar to 2.7 Ga), in the western Shandong greenstone belt of the eastern block of North China craton. The Mengyin komatiites have high-magnesian, low-titanium, and aluminum-undepleted chemical characteristics. Although the ultramafic rocks underwent amphibolite to greenschist facies metamorphism, they preserve remnant igneous spinifex textures. Some komatiite samples even preserve rare fresh olivine. According to the mass equilibrium between the olivine and melt, the potential eruption temperature of the Mengyin komatiites at 1 atm is about 1270 degrees C which might indicate a plume tectonic setting. It is inferred that komatiites in Mengyin, west Shandong may be part of a plume-related global magmatic event related to the break-up of a supercontinent that included the eastern block of the North China craton. (c) 2006 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.; Geosciences, Multidisciplinary; SCI(E); CPCI-S(ISTP); 0
语种	英语
DOI标识	10.1016/j.gr.2006.10.015
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/249933]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Cheng, Suhua,Kusky, Timothy. Komatiites from west Shandong, North China craton: Implications for plume tectonics. 2007-01-01.

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