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Article: Geochemistry of lower crustal xenoliths from Neogene Hannuoba Basalt, North China Craton: Implications for petrogenesis and lower crustal composition

TitleGeochemistry of lower crustal xenoliths from Neogene Hannuoba Basalt, North China Craton: Implications for petrogenesis and lower crustal composition
Authors
Issue Date2001
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/gca
Citation
Geochimica et Cosmochimica Acta, 2001, v. 65 n. 15, p. 2589-2604 How to Cite?
AbstractThirty granulite and pyroxenite xenoliths from the Neogene Hannuoba basalt of the North China craton have been analyzed for major and trace element compositions. The granulites range in composition from mafic to felsic with SiO 2 = 45.7 to 73.0% and also contain metasediments. The compositions of mafic and intermediate granulites can be explained by fractional crystallization of a magma chamber in the lower crust. The magmatic granulite xenoliths are interpreted as product of basaltic underplating and subsequent fractional crystallization at the base of the crust. Thermobarometric studies and correlation of calculated P-wave velocities with regional seismic refraction results suggest that the upper part of the lower crust, which accounts for two thirds of the entire lower crust in the North China craton at a 24- to 38-km depth, is dominated by intermediate and felsic compositions. Only the lowermost crust (38-42 km) has a mafic composition. This is also supported by the abundance of intermediate and felsic granulite xenoliths, which account for 45% of the granulite population collected. The calculated bulk lower crust in the Hannuoba area has an intermediate composition with SiO 2 = 58%. Because other parts of North China also show a similar velocity structure, with the high-velocity layer confined to the lowermost 3 to 5 km of crust, the results from the Hannuoba area are considered to be representative of the reactivated North China craton as a whole. Copyright © 2001 Elsevier Science Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/151051
ISSN
2015 Impact Factor: 4.315
2015 SCImago Journal Rankings: 3.016
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLiu, YSen_US
dc.contributor.authorGao, Sen_US
dc.contributor.authorJin, SYen_US
dc.contributor.authorHu, SHen_US
dc.contributor.authorSun, Men_US
dc.contributor.authorZhao, ZBen_US
dc.contributor.authorFeng, JLen_US
dc.date.accessioned2012-06-26T06:16:31Z-
dc.date.available2012-06-26T06:16:31Z-
dc.date.issued2001en_US
dc.identifier.citationGeochimica et Cosmochimica Acta, 2001, v. 65 n. 15, p. 2589-2604en_US
dc.identifier.issn0016-7037en_US
dc.identifier.urihttp://hdl.handle.net/10722/151051-
dc.description.abstractThirty granulite and pyroxenite xenoliths from the Neogene Hannuoba basalt of the North China craton have been analyzed for major and trace element compositions. The granulites range in composition from mafic to felsic with SiO 2 = 45.7 to 73.0% and also contain metasediments. The compositions of mafic and intermediate granulites can be explained by fractional crystallization of a magma chamber in the lower crust. The magmatic granulite xenoliths are interpreted as product of basaltic underplating and subsequent fractional crystallization at the base of the crust. Thermobarometric studies and correlation of calculated P-wave velocities with regional seismic refraction results suggest that the upper part of the lower crust, which accounts for two thirds of the entire lower crust in the North China craton at a 24- to 38-km depth, is dominated by intermediate and felsic compositions. Only the lowermost crust (38-42 km) has a mafic composition. This is also supported by the abundance of intermediate and felsic granulite xenoliths, which account for 45% of the granulite population collected. The calculated bulk lower crust in the Hannuoba area has an intermediate composition with SiO 2 = 58%. Because other parts of North China also show a similar velocity structure, with the high-velocity layer confined to the lowermost 3 to 5 km of crust, the results from the Hannuoba area are considered to be representative of the reactivated North China craton as a whole. Copyright © 2001 Elsevier Science Ltd.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/gcaen_US
dc.relation.ispartofGeochimica et Cosmochimica Actaen_US
dc.titleGeochemistry of lower crustal xenoliths from Neogene Hannuoba Basalt, North China Craton: Implications for petrogenesis and lower crustal compositionen_US
dc.typeArticleen_US
dc.identifier.emailSun, M: minsun@hku.hken_US
dc.identifier.authoritySun, M=rp00780en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0016-7037(01)00609-3en_US
dc.identifier.scopuseid_2-s2.0-0034893859en_US
dc.identifier.hkuros72250-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034893859&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume65en_US
dc.identifier.issue15en_US
dc.identifier.spage2589en_US
dc.identifier.epage2604en_US
dc.identifier.isiWOS:000170329300013-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLiu, YS=36707967700en_US
dc.identifier.scopusauthoridGao, S=36078559200en_US
dc.identifier.scopusauthoridJin, SY=7401822347en_US
dc.identifier.scopusauthoridHu, SH=48961118700en_US
dc.identifier.scopusauthoridSun, M=25932315800en_US
dc.identifier.scopusauthoridZhao, ZB=8398165900en_US
dc.identifier.scopusauthoridFeng, JL=48961001800en_US
dc.customcontrol.immutablesml 130311-

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