气候变化领域集成服务门户(CCPortal): Geology, geochemistry, and geochronology of the paleoproterozoic Donggouzi mafic-ultramafic complex: Implications for the evolution of the North China craton

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DOI	10.1016/j.lithos.2020.105567
	Geology, geochemistry, and geochronology of the paleoproterozoic Donggouzi mafic-ultramafic complex: Implications for the evolution of the North China craton
	Han, Shuxiang; Wu, Chen; Zhou, Zhiguang; Wang, Guosheng
通讯作者	Wu, C (通讯作者)
发表日期	2020
ISSN	0024-4937
EISSN	1872-6143
卷号	366
英文摘要	The Paleoproterozoic tectonic setting and spatial-temporal evolution of the northern North China and Central Orogenic belt constrain the assembly of the North China craton. Here we describe a new Paleoproterozoic mafic-ultramafic unit and intermediate-mafic intrusions located between the Khondalite belt and Central Orogenic belt, which we refer to as Donggouzi mafic-ultramafic complex. This complex is structurally complicated, and comprises a mixture of peridotite, amphibole pyroxenite, and websterite blocks, with associated alkali granitoid and gabbroic dikes, which were intruded into Paleoproterozoic granulites. Zircon U-Pb geochronology of the granulite, intruding syenite and alkali granites together with the field observations constrain the formation of the Donggouzi mafic-ultramafic complex to between 1849 and 1845 Ma, i.e. 1.85 Ga Geochemical and Sr-Nd isotopic data indicate that the Paleoproterozoic mafic-ultramafic rocks were sourced from enriched metasomatized mantle by the fluid from a subduction slab. Emplacement of the complex occurred in a post-orogenic extensional setting, possibly associated with the collision along the northern margin of the North China craton at ca. 1.9-1.88 Ga. The ca. 1767 Ma gabbroic dike was emplaced in an intraplate extensional setting and experienced crustal contamination, which suggests that an upwelling mantle plume produced magmas that interacted with the lithosphere during the late Paleoproterozoic. (C) 2020 Elsevier B.V. All rights reserved.
关键词	PB ZIRCON GEOCHRONOLOGY RARE-EARTH INNER-MONGOLIA EASTERN BLOCK PETROGENESIS CONSTRAINTS BELT ARC COLUMBIA PROVINCE
英文关键词	North China craton; Northern North China orogen; Paleoproterozoic; Mafic-ultramafic complex; Mantle sources; Gabbro
语种	英语
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
WOS类目	Geochemistry & Geophysics ; Mineralogy
WOS记录号	WOS:000540493000024
来源期刊	LITHOS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259742
推荐引用方式 GB/T 7714	Han, Shuxiang,Wu, Chen,Zhou, Zhiguang,et al. Geology, geochemistry, and geochronology of the paleoproterozoic Donggouzi mafic-ultramafic complex: Implications for the evolution of the North China craton[J]. 中国科学院青藏高原研究所,2020,366.
APA	Han, Shuxiang,Wu, Chen,Zhou, Zhiguang,&Wang, Guosheng.(2020).Geology, geochemistry, and geochronology of the paleoproterozoic Donggouzi mafic-ultramafic complex: Implications for the evolution of the North China craton.LITHOS,366.
MLA	Han, Shuxiang,et al."Geology, geochemistry, and geochronology of the paleoproterozoic Donggouzi mafic-ultramafic complex: Implications for the evolution of the North China craton".LITHOS 366(2020).