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Article: Paleoproterozoic rift-related volcanism of the Xiong'er Group, North China craton: Implications for the breakup of Columbia

TitlePaleoproterozoic rift-related volcanism of the Xiong'er Group, North China craton: Implications for the breakup of Columbia
Authors
Issue Date2002
PublisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGR
Citation
International Geology Review, 2002, v. 44 n. 4, p. 336-351 How to Cite?
AbstractThe Paleoproterozoic Xiong'er Group in the North China craton is composed of mafic to felsic volcanic rocks and minor sedimentary rocks (4.3%), and crops out over an area of 60,000 km 2. The volcanic and sedimentary strata, which vary from 3 km to 7 km in thickness, unconformably overlie an Archean and Paleoproterozoic crystalline basement, and are unconformably overlain by Meso-Neoproterozoic terrigenous clastic rocks and carbonates. Xiong'er volcanic rocks include basaltic andesite + andesite and dacite + rhyolite dated at 1760 Ma. The andesitic rocks contain clinopyroxene and plagioclase with minor olivine and orthopyroxene, but lack amphibole and biotite, suggesting crystallization from an anhydrous magma. All analyzed volcanic rocks are enriched in large-ion-lithophile elements (LILE; e.g., K, Rb, Ba) and light rare-earth elements (LREE), and are depleted in high-field-strength elements (HFSE; e.g., Nb, Ta, and Ti). They have high LILE/HFSE ratios and low Ti/Zr (40 to 8) and Sr/Y (16 to 2) ratios and 147Sm/ 144Nd (0.09792 to 0.1332), 143Nd/ 144Nd (0.511082 to 0.511480), ε Nd(1 = 1.76 Ga) (-3.8 to -9), and T DM (2.45 to 3.07 Ga). The geochemical and isotopic compositions indicate derivation from an enriched subcontinental lithospheric mantle previously contaminated by a subducted slab. The magmas exhibit the effects of low-pressure assimilation and fractional crystallization. The Xiong'er Group is contemporaneous with 1760 Ma mafic dike swarms, massif-type anorthosites, and rapakivi granites in the northern part of the North China craton. It formed in a continental-rift environment, marking the initiation of the breakup of the surpercontinent, Columbia.
Persistent Identifierhttp://hdl.handle.net/10722/72889
ISSN
2015 Impact Factor: 2.365
2015 SCImago Journal Rankings: 1.248
References

 

DC FieldValueLanguage
dc.contributor.authorZhao, TPen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorZhai, Men_HK
dc.contributor.authorXia, Ben_HK
dc.date.accessioned2010-09-06T06:46:04Z-
dc.date.available2010-09-06T06:46:04Z-
dc.date.issued2002en_HK
dc.identifier.citationInternational Geology Review, 2002, v. 44 n. 4, p. 336-351en_HK
dc.identifier.issn0020-6814en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72889-
dc.description.abstractThe Paleoproterozoic Xiong'er Group in the North China craton is composed of mafic to felsic volcanic rocks and minor sedimentary rocks (4.3%), and crops out over an area of 60,000 km 2. The volcanic and sedimentary strata, which vary from 3 km to 7 km in thickness, unconformably overlie an Archean and Paleoproterozoic crystalline basement, and are unconformably overlain by Meso-Neoproterozoic terrigenous clastic rocks and carbonates. Xiong'er volcanic rocks include basaltic andesite + andesite and dacite + rhyolite dated at 1760 Ma. The andesitic rocks contain clinopyroxene and plagioclase with minor olivine and orthopyroxene, but lack amphibole and biotite, suggesting crystallization from an anhydrous magma. All analyzed volcanic rocks are enriched in large-ion-lithophile elements (LILE; e.g., K, Rb, Ba) and light rare-earth elements (LREE), and are depleted in high-field-strength elements (HFSE; e.g., Nb, Ta, and Ti). They have high LILE/HFSE ratios and low Ti/Zr (40 to 8) and Sr/Y (16 to 2) ratios and 147Sm/ 144Nd (0.09792 to 0.1332), 143Nd/ 144Nd (0.511082 to 0.511480), ε Nd(1 = 1.76 Ga) (-3.8 to -9), and T DM (2.45 to 3.07 Ga). The geochemical and isotopic compositions indicate derivation from an enriched subcontinental lithospheric mantle previously contaminated by a subducted slab. The magmas exhibit the effects of low-pressure assimilation and fractional crystallization. The Xiong'er Group is contemporaneous with 1760 Ma mafic dike swarms, massif-type anorthosites, and rapakivi granites in the northern part of the North China craton. It formed in a continental-rift environment, marking the initiation of the breakup of the surpercontinent, Columbia.en_HK
dc.languageengen_HK
dc.publisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGRen_HK
dc.relation.ispartofInternational Geology Reviewen_HK
dc.titlePaleoproterozoic rift-related volcanism of the Xiong'er Group, North China craton: Implications for the breakup of Columbiaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0020-6814&volume=44&spage=336&epage=351&date=2002&atitle=Paleoproterozoic+rift-related+volcanism+of+the+Xiong%27er+Group,+North+China+Craton:+implications+for+the+breakup+of+Columbiaen_HK
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0036552938en_HK
dc.identifier.hkuros82663en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036552938&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume44en_HK
dc.identifier.issue4en_HK
dc.identifier.spage336en_HK
dc.identifier.epage351en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZhao, TP=7402268400en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridZhai, M=35910309500en_HK
dc.identifier.scopusauthoridXia, B=36112247900en_HK

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