Nature, composition, enrichment processes and its mechanism of the Mesozoic lithospheric mantle beneath the southeastern North China Craton

	Nature, composition, enrichment processes and its mechanism of the Mesozoic lithospheric mantle beneath the southeastern North China Craton
	Zhang, HF ; Zhou, XH ; Fan, WM ; Sun, M ; Guo, F ; Tang, YJ ; Zhang, J ; Niu, LF
刊名	ACTA PETROLOGICA SINICA
	2005-07-01
卷号	21 期号:4 页码:1271-1280
关键词	Mesozoic Mantle-derived Rocks Lithospheric Mantle North China Craton
ISSN号	1000-0569
文献子类	Article
英文摘要	This paper aims to constrain the nature and composition of the Mesozoic lithospheric mantle beneath the southeastern North China Craton on the basis of a systematic review on the temporal and spatial distribution and geochemical features of Mesozoic mantle-derived magmatism in the region, and to further understand the temporal and spatial evolution, enrichment processes and its mechanism of the lithosphere through the comparison with the Mesozoic lithospheric mantle beneath the central, i.e. Luzhong region. Sr-Nd-Pb isotopic features of mantle-derived rocks imply that apparently temporal and spatial heterogeneity of the Mesozoic lithospheric mantle existed beneath the eastern North China Craton, the mantle under the central North China Craton, i.e the Luzhong region was dominantly slightly enriched and that under the southeastern North China Craton such as Luxi and Jiaodong region was EM2-like ((87)Sr/(86)Sr(i) up to 0.7114). It is also apparent that the Mesozoic lithospheric mantle beneath the southeastern North China Craton evolved with time. These geochemical features of mantle-derived rocks and compositional and textural characteristics of the basalt-borne mantle xenoliths (peridotites and pyroxenites) and xenocrysts (olivine and pyroxene) demonstrate that the Mesozoic lithospheric mantle beneath the southeastern North China Craton was severely affected by the silica-rich melts. Reaction between lithospheric peridotite and infiltrated melt was considered to be an important type of lithospheric reconstruction and transformation, which led to the transformation of the Paleozoic high-Mg(#) peridotite to late Mesozoic low-Mg(#) peridotite and pyroxenite. Influx of melts into the lithospheric mantle, which had the geochemical characteristics of partial melting of the lower/middle crust, resulted in rapid enrichment of the late Mesozoic lithospheric mantle beneath the southeastern North China Craton. Relevant scientific issues such as the timing, processes and its mechanism of Mesozoic lithospheric thinning and reconstruction of the eastern North China Craton have also been discussed.
WOS关键词	WESTERN SHANDONG PROVINCE ; EASTERN CHINA ; INTRUSIVE COMPLEXES ; TECTONIC IMPLICATIONS ; ISOTOPIC CONSTRAINTS ; TAIHANG MOUNTAINS ; CONTINENTAL-CRUST ; VOLCANIC-ROCKS ; MAFIC DIKES ; GEOCHEMISTRY
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000232291300024
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65722]
专题	中国科学院地质与地球物理研究所
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Zhang, HF,Zhou, XH,Fan, WM,et al. Nature, composition, enrichment processes and its mechanism of the Mesozoic lithospheric mantle beneath the southeastern North China Craton[J]. ACTA PETROLOGICA SINICA,2005,21(4):1271-1280.
APA	Zhang, HF.,Zhou, XH.,Fan, WM.,Sun, M.,Guo, F.,...&Niu, LF.(2005).Nature, composition, enrichment processes and its mechanism of the Mesozoic lithospheric mantle beneath the southeastern North China Craton.ACTA PETROLOGICA SINICA,21(4),1271-1280.
MLA	Zhang, HF,et al."Nature, composition, enrichment processes and its mechanism of the Mesozoic lithospheric mantle beneath the southeastern North China Craton".ACTA PETROLOGICA SINICA 21.4(2005):1271-1280.