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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
Source PublicationNATURE
Volume432Issue:7019Pages:892-897
AbstractFoundering 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.
DOI10.1038/nature03162
Language英语
ISSN0028-0836
Indexed BySCI ; EI
EI Accession Number2005028778227
WOS IDWOS:000225733500050
WOS SubjectMultidisciplinary Sciences
WOS Research AreaScience & Technology - Other Topics
PublisherNATURE PUBLISHING GROUP
Citation statistics
Cited Times:1645[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.cug.edu.cn/handle/2XU834YA/99498
Collection中国地质大学(武汉)
Affiliation1.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
Recommended Citation
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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