Recycling lower continental crust in the North China craton

doi:10.1038/nature03162

CUG-IR

	Recycling lower continental crust in the North China craton
	Gao S ; Rudnick RL ; Yuan HL ; Liu XM ; Liu YS ; Xu WL ; Ling WL ; Ayers J ; Wang XC ; Wang QH
	2004-12-16
发表期刊	NATURE
卷号	432 期号:7019 页码:892-897
摘要	Foundering of mafic lower continental crust into underlying convecting mantle has been proposed as one means to explain the unusually evolved chemical composition of Earth's continental crust(1,2), yet direct evidence of this process has been scarce. Here we report that Late Jurassic high-magnesium andesites, dacites and adakites ( siliceous lavas with high strontium and low heavy-rare-earth element and yttrium contents) from the North China craton have chemical and petrographic features consistent with their origin as partial melts of eclogite that subsequently interacted with mantle peridotite. Similar features observed in adakites and some Archaean sodium-rich granitoids of the tonalite-trondhjemite-granodiorite series have been interpreted to result from interaction of slab melts with the mantle wedge. Unlike their arc-related counterparts, however, the Chinese magmas carry inherited Archaean zircons and have neodymium and strontium isotopic compositions overlapping those of eclogite xenoliths derived from the lower crust of the North China craton. Such features cannot be produced by crustal assimilation of slab melts, given the high Mg#, nickel and chromium contents of the lavas. We infer that the Chinese lavas derive from ancient mafic lower crust that foundered into the convecting mantle and subsequently melted and interacted with peridotite. We suggest that lower crustal foundering occurred within the North China craton during the Late Jurassic, and thus provides constraints on the timing of lithosphere removal beneath the North China craton.
DOI	10.1038/nature03162
语种	英语
ISSN	0028-0836
收录类别	SCI ; EI
EI入藏号	2005028778227
WOS记录号	WOS:000225733500050
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
出版者	NATURE PUBLISHING GROUP
引用统计	被引频次：1622[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.cug.edu.cn/handle/2XU834YA/99498
专题	中国地质大学（武汉）
作者单位	1.Univ Maryland, Dept Geol, Geochem Lab, College Pk, MD 20742 USA; 2.NW Univ Xian, Dept Geol, Key Lab Continental Dynam, Xian 710069, Peoples R China; 3.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China; 4.Jilin Univ, Sch Earth Sci, Changchun 130061, Peoples R China; 5.Vanderbilt Univ, Dept Geol, Nashville, TN 37235 USA
推荐引用方式 GB/T 7714	Gao S,Rudnick RL,Yuan HL,et al. Recycling lower continental crust in the North China craton[J]. NATURE,2004,432(7019):892-897.
APA	Gao S.,Rudnick RL.,Yuan HL.,Liu XM.,Liu YS.,...&Wang QH.(2004).Recycling lower continental crust in the North China craton.NATURE,432(7019),892-897.
MLA	Gao S,et al."Recycling lower continental crust in the North China craton".NATURE 432.7019(2004):892-897.

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