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Article: Trace elemental and PGE geochemical constraints of Mesozoic and Cenozoic peridotitic xenoliths on lithospheric evolution of the North China Craton

TitleTrace elemental and PGE geochemical constraints of Mesozoic and Cenozoic peridotitic xenoliths on lithospheric evolution of the North China Craton
Authors
Issue Date2005
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/gca
Citation
Geochimica et Cosmochimica Acta, 2005, v. 69 n. 13, p. 3401-3418 How to Cite?
AbstractWhole-rock major, trace, and platinum-group elemental (PGE) data, and major and trace element compositions of diopsides are reported for peridotite xenoliths from (1) early Mesozoic volcanic breccias in Xinyang, located at the southern margin of the North China Craton, and (2) Cenozoic basalts in Hebi and Shanwang, both of which are situated within the craton and lie on the North-South Gravity Line and the Tanlu fault zone, respectively. The early Mesozoic Xinyang xenoliths are harzburgites containing <2% Cpx with high Cr # and enriched in LREE but depleted in HFSE. These xenoliths have chondritic Pd/Ir (1.9-6.6) and Ru/Ir (3.5-4.0) ratios and high Ni and low CaO, Al 2O 3, and S contents, indicating derivation from a highly refractory mantle that experienced carbonatitic metasomatism. Negative Ce (mean δCe = 0.50) and low Mg/Si ratios of the Xinyang peridotites record the addition of crustal components likely produced from subducted continental material of the Yangtze Craton in the early Mesozoic. The subduction-related modification of the lithospheric mantle was limited to the area close to the collision zone rather than being pervasive throughout the craton. The Cenozoic Hebi peridotite xenoliths are harzburgites with ≤4.5% Cpx and have low CaO and Al 2 O 3 but high Ni contents, chondritic Ru/Ir ratios (2.5-5.4), and a wide range of CaO/Al 2O 3, Na 2O/ TiO 2, Pt/Ir (0.4-2.3), and Pd/Pt (1.1-8.5) ratios. These peridotites are interpreted as the shallow relics of the cratonic mantle. In contrast, the Cenozoic Shanwang xenoliths are lherzolites (5.6%-19.5% Cpx), which have low Ni contents and low Ni/Cu and Mg/Si ratios, but high CaO, Al 2O 3, S, and HREE contents, and relatively high Ru/Ir and Pd/Ir ratios. The Shanwang peridotites show pronounced positive Ti and Sr, negative Th, and slightly negative Y, Zr, and Hf anomalies. They are believed to represent newly accreted fertile lithospheric mantle derived from cooling of upwelling asthenosphere. The documented temporal and spatial variations in the Mesozoic-Cenozoic mantle support the previous suggestion that the buoyant refractory continental keel in the eastern part of the North China Craton was heterogeneously replaced by younger fertile lithospheric mantle in the late Cretaceous-early Tertiary. Copyright © 2005 Elsevier Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/72858
ISSN
2015 Impact Factor: 4.315
2015 SCImago Journal Rankings: 3.016
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZheng, Jen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorRobinson, Pen_HK
dc.date.accessioned2010-09-06T06:45:46Z-
dc.date.available2010-09-06T06:45:46Z-
dc.date.issued2005en_HK
dc.identifier.citationGeochimica et Cosmochimica Acta, 2005, v. 69 n. 13, p. 3401-3418en_HK
dc.identifier.issn0016-7037en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72858-
dc.description.abstractWhole-rock major, trace, and platinum-group elemental (PGE) data, and major and trace element compositions of diopsides are reported for peridotite xenoliths from (1) early Mesozoic volcanic breccias in Xinyang, located at the southern margin of the North China Craton, and (2) Cenozoic basalts in Hebi and Shanwang, both of which are situated within the craton and lie on the North-South Gravity Line and the Tanlu fault zone, respectively. The early Mesozoic Xinyang xenoliths are harzburgites containing <2% Cpx with high Cr # and enriched in LREE but depleted in HFSE. These xenoliths have chondritic Pd/Ir (1.9-6.6) and Ru/Ir (3.5-4.0) ratios and high Ni and low CaO, Al 2O 3, and S contents, indicating derivation from a highly refractory mantle that experienced carbonatitic metasomatism. Negative Ce (mean δCe = 0.50) and low Mg/Si ratios of the Xinyang peridotites record the addition of crustal components likely produced from subducted continental material of the Yangtze Craton in the early Mesozoic. The subduction-related modification of the lithospheric mantle was limited to the area close to the collision zone rather than being pervasive throughout the craton. The Cenozoic Hebi peridotite xenoliths are harzburgites with ≤4.5% Cpx and have low CaO and Al 2 O 3 but high Ni contents, chondritic Ru/Ir ratios (2.5-5.4), and a wide range of CaO/Al 2O 3, Na 2O/ TiO 2, Pt/Ir (0.4-2.3), and Pd/Pt (1.1-8.5) ratios. These peridotites are interpreted as the shallow relics of the cratonic mantle. In contrast, the Cenozoic Shanwang xenoliths are lherzolites (5.6%-19.5% Cpx), which have low Ni contents and low Ni/Cu and Mg/Si ratios, but high CaO, Al 2O 3, S, and HREE contents, and relatively high Ru/Ir and Pd/Ir ratios. The Shanwang peridotites show pronounced positive Ti and Sr, negative Th, and slightly negative Y, Zr, and Hf anomalies. They are believed to represent newly accreted fertile lithospheric mantle derived from cooling of upwelling asthenosphere. The documented temporal and spatial variations in the Mesozoic-Cenozoic mantle support the previous suggestion that the buoyant refractory continental keel in the eastern part of the North China Craton was heterogeneously replaced by younger fertile lithospheric mantle in the late Cretaceous-early Tertiary. Copyright © 2005 Elsevier Ltd.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/gcaen_HK
dc.relation.ispartofGeochimica et Cosmochimica Actaen_HK
dc.titleTrace elemental and PGE geochemical constraints of Mesozoic and Cenozoic peridotitic xenoliths on lithospheric evolution of the North China Cratonen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0016-7037&volume=69&spage=3401&epage=3418&date=2005&atitle=Trace+elemental+and+PGE+geochemical+constraints+of+Mesozoic+and+Cenozoic+peridotitic+xenoliths+on+lithospheric+evolution+of+the+North+China+Cratonen_HK
dc.identifier.emailZheng, J: jpzheng@yahoo.comen_HK
dc.identifier.emailSun, M: minsun@hku.hken_HK
dc.identifier.emailZhou, MF: mfzhou@hkucc.hku.hk-
dc.identifier.authoritySun, M=rp00780en_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.gca.2005.03.020en_HK
dc.identifier.scopuseid_2-s2.0-21644476739en_HK
dc.identifier.hkuros108749en_HK
dc.identifier.hkuros120054-
dc.identifier.hkuros127643-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-21644476739&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume69en_HK
dc.identifier.issue13en_HK
dc.identifier.spage3401en_HK
dc.identifier.epage3418en_HK
dc.identifier.isiWOS:000230470500016-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridZheng, J=48961536100en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridRobinson, P=7403720506en_HK
dc.customcontrol.immutablesml 130308-

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