Origin of sanukitoid and hornblendite enclaves in the Dajitu pluton from the Yinshan Block, North China Craton: product of Neoarchaean ridge subduction?

doi:10.1080/00206814.2014.929055

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	Origin of sanukitoid and hornblendite enclaves in the Dajitu pluton from the Yinshan Block, North China Craton: product of Neoarchaean ridge subduction?
	Ma, Xudong 5; Fan, Hong-Rui ; Santosh, M.; Liu, Xuan 1; Guo, Jing-Hui
刊名	INTERNATIONAL GEOLOGY REVIEW
	2014
卷号	56 期号:10 页码:1197-1212
关键词	geochemistry Nd isotope Neoarchaean sanukitoid ridge subduction North China Craton
ISSN号	0020-6814
DOI	10.1080/00206814.2014.929055
英文摘要	A Neoarchaean sanukitoid pluton that was intruded into the base of the Guyang greenstone belt in the Yinshan Block of the North China Craton hosts a number of hornblendite enclaves. Geochemically, the pluton is characterized by high MgO, Mg#, Cr, Ni, large-ion lithophile element (LILE), and heavy rare earth element (HREE) contents and low TiO2 and high-field strength element (HFSE) contents, and has relatively low Sr/Y ratios and negative Eu anomalies. Whole-rock Sr-Nd isotopic analyses indicate that it has epsilon(Nd)(t) values of +1.4 to +2.0. These geochemical and isotopic characteristic suggest that the sanukitoid was formed under a low-pressure and high-temperature environment by slab melting and assimilation of hornblendite enclaves. The hornblendite enclaves show high MgO, Mg#, Cr, and Ni contents, high and variable K2O, LREE, and Th contents, enrichment in LILEs and LREEs, and depletion in HFSEs. They have high Y contents and relatively low Sr/Y values, strongly negative Eu anomalies, and whole-rock epsilon(Nd)(t) values of +1.0 to +1.9. The geochemical and isotopic characteristics indicate that these enclaves might have been derived from a mixed source of an enriched mantle, metasomatized by melts expelled from subducted sediments in a high-temperature, low-pressure environment. To explain these characteristics, a ridge subduction model is proposed for the formation of the sanukitoid and hornblendite in the Yinshan Block in the Neoarchaean.
学科主题	变质岩岩石学
WOS关键词	WESTERN SUPERIOR PROVINCE ; HIGH-PRESSURE GRANULITES ; ARCHEAN CRUSTAL GROWTH ; U-PB AGES ; GREENSTONE-BELT ; INNER-MONGOLIA ; SM-ND ; GEOLOGICAL SIGNIFICANCE ; METAMORPHIC ROCKS ; GEOCHEMICAL CHARACTERISTICS
WOS研究方向	Geology
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:000340481700002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40377]
专题	中国地质科学院矿产资源研究所
作者单位	1.Chinese Acad Geol Sci, Inst Mineral Resources, MLR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Santosh, M.] China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 5.中国地质科学院矿产资源研究所
推荐引用方式 GB/T 7714	Ma, Xudong,Fan, Hong-Rui,Santosh, M.,et al. Origin of sanukitoid and hornblendite enclaves in the Dajitu pluton from the Yinshan Block, North China Craton: product of Neoarchaean ridge subduction?[J]. INTERNATIONAL GEOLOGY REVIEW,2014,56(10):1197-1212.
APA	Ma, Xudong,Fan, Hong-Rui,Santosh, M.,Liu, Xuan,&Guo, Jing-Hui.(2014).Origin of sanukitoid and hornblendite enclaves in the Dajitu pluton from the Yinshan Block, North China Craton: product of Neoarchaean ridge subduction?.INTERNATIONAL GEOLOGY REVIEW,56(10),1197-1212.
MLA	Ma, Xudong,et al."Origin of sanukitoid and hornblendite enclaves in the Dajitu pluton from the Yinshan Block, North China Craton: product of Neoarchaean ridge subduction?".INTERNATIONAL GEOLOGY REVIEW 56.10(2014):1197-1212.