干旱区生态环境知识资源中心(Arid): The Hudesheng mafic-ultramafic intrusions in the Oulongbuluke Block, Qinghai Province, NW China: chronology, geochemistry, isotopic systematics and tectonic implications

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DOI	10.1017/S0016756818000778
	The Hudesheng mafic-ultramafic intrusions in the Oulongbuluke Block, Qinghai Province, NW China: chronology, geochemistry, isotopic systematics and tectonic implications
	Li, Haoran; Sun, Fengyue; Li, Liang; Yan, Jiaming
通讯作者	Sun, Fengyue
来源期刊	GEOLOGICAL MAGAZINE
ISSN	0016-7568
EISSN	1469-5081
出版年	2019
卷号	156 期号:9 页码:1527-1546
英文摘要	The Hudesheng mafic-ultramafic intrusions are located in the Oulongbuluke Block, north of the Qaidam Block in Qinghai Province, NW China. We carried out a detailed study of the intrusions, including field observations, petrology, zircon U-Pb geochronology, Lu-Hf isotopes, bulk-rock major- and trace-element geochemistry, and mineral compositions, to provide a better understanding of their properties and the regional tectonic evolution. Zircon U-Pb dating on gabbro and pyroxenite samples yielded ages of 465 and 455 Ma, respectively. Geochemical data, in conjunction with the field observations and petrological features, suggest that the complex is Alaskan-type and the magma was derived from a depleted mantle source that was hydrous picritic basalt in composition and influenced by crustal contamination and slab-derived fluid metasomatism. Based on all the chronological, petrological, mineralogical and geochemical and regional geological data, we conclude that the palaeo-ocean closed diachronously from west to east between the Qaidam and Oulongbuluke blocks, and that the ocean in the east of the North Qaidam region closed after similar to 455 Ma.
英文关键词	Alaskan-type intrusion arc magmatism mafic-ultramafic complex Oulongbuluke Block Qaidam Block
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000478894700003
WOS关键词	ALASKAN-TYPE COMPLEX ; PB ZIRCON GEOCHRONOLOGY ; QAIDAM UHPM BELT ; NORTH QAIDAM ; EASTERN DESERT ; SM-ND ; WESTERN CHINA ; OCEANIC-CRUST ; METAMORPHIC EVOLUTION ; CONTINENTAL-CRUST
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215969
作者单位	Jilin Univ, Coll Earth Sci, Changchun 130061, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Li, Haoran,Sun, Fengyue,Li, Liang,et al. The Hudesheng mafic-ultramafic intrusions in the Oulongbuluke Block, Qinghai Province, NW China: chronology, geochemistry, isotopic systematics and tectonic implications[J],2019,156(9):1527-1546.
APA	Li, Haoran,Sun, Fengyue,Li, Liang,&Yan, Jiaming.(2019).The Hudesheng mafic-ultramafic intrusions in the Oulongbuluke Block, Qinghai Province, NW China: chronology, geochemistry, isotopic systematics and tectonic implications.GEOLOGICAL MAGAZINE,156(9),1527-1546.
MLA	Li, Haoran,et al."The Hudesheng mafic-ultramafic intrusions in the Oulongbuluke Block, Qinghai Province, NW China: chronology, geochemistry, isotopic systematics and tectonic implications".GEOLOGICAL MAGAZINE 156.9(2019):1527-1546.