Late Neoarchean to Early Paleoproterozoic magmatic events and tectonothermal systems in the North China Craton.

CORC > 中国地质调查局 > 中国地质调查局

	Late Neoarchean to Early Paleoproterozoic magmatic events and tectonothermal systems in the North China Craton.
	Geng, YS (Geng YuanSheng); Shen, QH (Shen QiHan); Ren, LD (Ren LiuDong)
刊名	ACTA PETROLOGICA SINICA
	2010
卷号	26 期号:7 页码:1945-1966
关键词	Late Neoarchean to Early Paleoproterozoic Magmatic events Orthogneiss Mantle plume The North China Craton
ISSN号	1000-0569
英文摘要	Magmatic origin orthogneisses are wide distribution in metamorphosed basements of the North China Craton (NCC). This paper divides the NCC into 11 metamorphic areas and further discusses the occurrence, lithological assemblage and ages of Late Neoarchean to Early Paleoproterozoic orthogneisses. Newly obtained geological data with respect to the Late Neoarchean to Early Paleoproterozoic orthogneisses in the 11 metamorphic areas reveal the NCC with following characteristics (1) Late Neoarchean to Early Paleoproterozoic magmatic activity is widespread in the whole NCC, which formed the orthogneisses over 70% of the metamorphosed basements of the NCC. These orthogneisses are widely distributed not only in the east block and the west block, but also in the central orogenic belt of the NCC; (2) This magmatism mostly occurred within the range of 50Ma from 2540Ma to 2490Ma, and over 75% of the orthogneisses between 2600Ma and 2450Ma; (3) Sodium gneisses and potassium gneisses were mostly formed in the same period, and have not zonality in every metamorphic area, but relatively concentrated in Anshan (Liaoning), Suizhong (western Liaoning), Qinhuangdao (eastern Hebei) and Aolaishan (western Shandong) areas of the NCC; (4) Both magmatic and metamorphic events are almost synchronous and commonly metamorphism was later about 10 similar to 15Ma than magmatism, revealing that both the magmatism and metamorphism were derived from the same tectonothermal geodynamic processes; (5) Most of these orthogneisses display positive epsilon(Hf)(t) values, indicating that they were derived from partial melting of juvenile lower crust materials reconstructed by the injected mantle magma. Therefore, we suggested that the Late Neoarchean to Early Paleoproterozoic magmatism was caused by the mantle magma underplating to the lower crust, which was most likely to be derived from the mantle plume activity, and caused the Late Archean to Early Paleoproterozoic significant growth of the continental crust of the NCC.
学科主题	火成岩岩石学
WOS关键词	PB ZIRCON GEOCHRONOLOGY ; LATE ARCHEAN MAGMATISM ; U-PB ; TECTONIC EVOLUTION ; DETRITAL ZIRCONS ; FUPING COMPLEX ; GEOLOGICAL SIGNIFICANCE ; INNER-MONGOLIA ; ZHONGTIAO MOUNTAINS ; CRUSTAL EVOLUTION
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000280658100001
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39201]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Geng, YS ,Shen, QH ,Ren, LD . Late Neoarchean to Early Paleoproterozoic magmatic events and tectonothermal systems in the North China Craton.[J]. ACTA PETROLOGICA SINICA,2010,26(7):1945-1966.
APA	Geng, YS ,Shen, QH ,&Ren, LD .(2010).Late Neoarchean to Early Paleoproterozoic magmatic events and tectonothermal systems in the North China Craton..ACTA PETROLOGICA SINICA,26(7),1945-1966.
MLA	Geng, YS ,et al."Late Neoarchean to Early Paleoproterozoic magmatic events and tectonothermal systems in the North China Craton.".ACTA PETROLOGICA SINICA 26.7(2010):1945-1966.