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Article: Geochemistry, isotope systematics and petrogenesis of the volcanic rocks in the Zhongtiao Mountain: An alternative interpretation for the evolution of the southern margin of the North China Craton

TitleGeochemistry, isotope systematics and petrogenesis of the volcanic rocks in the Zhongtiao Mountain: An alternative interpretation for the evolution of the southern margin of the North China Craton
Authors
KeywordsMantle Source Enrichment
North China Craton
Paleo-Mesoproterozoic Subduction Zone
Xiong'er Volcanic Rocks
Issue Date2008
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithos
Citation
Lithos, 2008, v. 102 n. 1-2, p. 158-178 How to Cite?
AbstractThe Xiong'er volcanic rocks constitute a large Paleo-Mesoproterozoic volcanic belt along the southern margin of the North China Craton, which are composed primarily of basaltic andesites and andesites, with minor dacites and dacitic rhyolites. The basaltic andesites and andesites from the Xiong'er volcanic rocks in the Zhongtiao Mountain show consistent e{open}Nd(t), La/Nb and Th/Nb values irrespectively of SiO2, which preclude significant crustal contamination during ascent. Both of these volcanic rocks share similar incompatible ratios (e.g. La/Sm, Zr/Nb, La/Nb), indicating that the basaltic andesites and andesites originated from the same source. The basaltic andesites are characterized by high Mg-number (45-55%), precluding the possibility of their derivation from the melting of the lower crust. Variable Ti/Eu, Zr/Sm and Nb/La ratios for the basaltic andesites with higher partial melting degree suggest that amphiboles remained as residues in the magma source, indicating that the Xiong'er volcanic rocks were derived from hydrous magma. Non-radiogenic Nd isotopes for the Xiong'er volcanic rocks are inherited from a mantle source which had been enriched by the subduction-related crustal recycling during Archean to Paleoproterozoic time. Basaltic andesites show HFSE enrichments (especially Nb > 4.7 ppm) and high Fe-Ti contents, comparable with Nb-enriched basalts, suggesting that the Xiong'er volcanic rocks were derived from a metasomatized mantle source, similar to that of Nb-enriched basalts. Therefore, the mantle source of the Xiong'er volcanic rocks in the Zhongtiao Mountain has been enriched in Fe-Ti oxides and HFSE by equilibrium reactions with the slab melts during late Archean and Paleoproterozoic subduction processes, as evidenced by Nd isotopes. In the primitive mantle normalized trace element diagrams, the Xiong'er volcanic rocks show enrichments in the LILE and LREE and negative anomalies on the Nb-Ta-Ti, similar to arc-related volcanic rocks produced by the hydrous melting of the metasomatized mantle wedge. In the Paleo-Mesoproterozoic, the Xiong'er volcanic rocks in the Zhongtiao Mountain were produced by the slab dehydration-induced melting of an existing metasomatized mantle source, and the fluids from the slab dehydration introduced significant LILE and LREE to the source, masking its inherent HFSE-enriched characteristics. The arc-related characteristics of the Xiong'er volcanic rocks in the Zhongtiao Mountain suggest the Xiong'er volcanic belt constructs a subduction zone along the southern margin of the North China Craton in the Paleo-Mesoproterozoic, implying that the craton may have recorded the outbuilding history of the Columbia Supercontinent during Paleo-Mesoproterozoic time. © 2007 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/151238
ISSN
2015 Impact Factor: 3.723
2015 SCImago Journal Rankings: 2.920
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHe, Yen_US
dc.contributor.authorZhao, Gen_US
dc.contributor.authorSun, Men_US
dc.contributor.authorWilde, SAen_US
dc.date.accessioned2012-06-26T06:19:07Z-
dc.date.available2012-06-26T06:19:07Z-
dc.date.issued2008en_US
dc.identifier.citationLithos, 2008, v. 102 n. 1-2, p. 158-178en_US
dc.identifier.issn0024-4937en_US
dc.identifier.urihttp://hdl.handle.net/10722/151238-
dc.description.abstractThe Xiong'er volcanic rocks constitute a large Paleo-Mesoproterozoic volcanic belt along the southern margin of the North China Craton, which are composed primarily of basaltic andesites and andesites, with minor dacites and dacitic rhyolites. The basaltic andesites and andesites from the Xiong'er volcanic rocks in the Zhongtiao Mountain show consistent e{open}Nd(t), La/Nb and Th/Nb values irrespectively of SiO2, which preclude significant crustal contamination during ascent. Both of these volcanic rocks share similar incompatible ratios (e.g. La/Sm, Zr/Nb, La/Nb), indicating that the basaltic andesites and andesites originated from the same source. The basaltic andesites are characterized by high Mg-number (45-55%), precluding the possibility of their derivation from the melting of the lower crust. Variable Ti/Eu, Zr/Sm and Nb/La ratios for the basaltic andesites with higher partial melting degree suggest that amphiboles remained as residues in the magma source, indicating that the Xiong'er volcanic rocks were derived from hydrous magma. Non-radiogenic Nd isotopes for the Xiong'er volcanic rocks are inherited from a mantle source which had been enriched by the subduction-related crustal recycling during Archean to Paleoproterozoic time. Basaltic andesites show HFSE enrichments (especially Nb > 4.7 ppm) and high Fe-Ti contents, comparable with Nb-enriched basalts, suggesting that the Xiong'er volcanic rocks were derived from a metasomatized mantle source, similar to that of Nb-enriched basalts. Therefore, the mantle source of the Xiong'er volcanic rocks in the Zhongtiao Mountain has been enriched in Fe-Ti oxides and HFSE by equilibrium reactions with the slab melts during late Archean and Paleoproterozoic subduction processes, as evidenced by Nd isotopes. In the primitive mantle normalized trace element diagrams, the Xiong'er volcanic rocks show enrichments in the LILE and LREE and negative anomalies on the Nb-Ta-Ti, similar to arc-related volcanic rocks produced by the hydrous melting of the metasomatized mantle wedge. In the Paleo-Mesoproterozoic, the Xiong'er volcanic rocks in the Zhongtiao Mountain were produced by the slab dehydration-induced melting of an existing metasomatized mantle source, and the fluids from the slab dehydration introduced significant LILE and LREE to the source, masking its inherent HFSE-enriched characteristics. The arc-related characteristics of the Xiong'er volcanic rocks in the Zhongtiao Mountain suggest the Xiong'er volcanic belt constructs a subduction zone along the southern margin of the North China Craton in the Paleo-Mesoproterozoic, implying that the craton may have recorded the outbuilding history of the Columbia Supercontinent during Paleo-Mesoproterozoic time. © 2007 Elsevier B.V. All rights reserved.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithosen_US
dc.relation.ispartofLithosen_US
dc.rightsLithos. Copyright © Elsevier BV.-
dc.subjectMantle Source Enrichmenten_US
dc.subjectNorth China Cratonen_US
dc.subjectPaleo-Mesoproterozoic Subduction Zoneen_US
dc.subjectXiong'er Volcanic Rocksen_US
dc.titleGeochemistry, isotope systematics and petrogenesis of the volcanic rocks in the Zhongtiao Mountain: An alternative interpretation for the evolution of the southern margin of the North China Cratonen_US
dc.typeArticleen_US
dc.identifier.emailZhao, G: gzhao@hkucc.hku.hken_US
dc.identifier.emailSun, M: minsun@hku.hken_US
dc.identifier.authorityZhao, G=rp00842en_US
dc.identifier.authoritySun, M=rp00780en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.lithos.2007.09.004en_US
dc.identifier.scopuseid_2-s2.0-41349114624en_US
dc.identifier.hkuros144305-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-41349114624&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume102en_US
dc.identifier.issue1-2en_US
dc.identifier.spage158en_US
dc.identifier.epage178en_US
dc.identifier.isiWOS:000255605500010-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridHe, Y=8678944900en_US
dc.identifier.scopusauthoridZhao, G=7403296321en_US
dc.identifier.scopusauthoridSun, M=25932315800en_US
dc.identifier.scopusauthoridWilde, SA=35254758600en_US
dc.customcontrol.immutablesml 130311-

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