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Article: Geochemistry and Nd-Sr-Pb isotopic compositions of granitoids from qaidam and oulongbuluke micro-blocks, NW China: Constraints on basement nature and tectonic affinity

TitleGeochemistry and Nd-Sr-Pb isotopic compositions of granitoids from qaidam and oulongbuluke micro-blocks, NW China: Constraints on basement nature and tectonic affinity
Authors
KeywordsBasemental attribute
Granitoids
Nd-Sr-Pb isotopic geochemistry
NW China
Qaidam and Oulongbuluke micro-blocks
Issue Date2007
Citation
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal Of China University Of Geosciences, 2007, v. 32 n. 1, p. 7-21 How to Cite?
AbstractThe formation of major and trace elemental and Sr-Nd-Pb isotopic geochemistries in Early Paleoproterozoic Mohe pluton and Early Triassic Cahanno pluton of the Oulongbuluke micro-block and Neoproterozoic Shaliuhe pluton, Late-Permian to Early-Triaasic Xiangride pluton and Late-Triassic Keri pluton of the Qaidam Block of northwestern China, were investigated. The Shaliuhe pluton and Keri muscovite pluton are characterized by S-type and paraaluminium granite, the others are by I-type granodiorite or granite. It is concluded from the comparsion of TDM and εNd that the magma source area of the Shaliuhe granite belongs to the II-type metabasement of the Oulongbuluke micro-block, and the magma of the rest of the plutons could not originate from the exposed supracurstal sequences. The TDMare clustered at -1.5-2.3 Ga and 0.9-1.3 Ga, with peak value of ∼1.2 Ga, ∼1.6 Ga and ∼2.05 Ga for both granitoids and meta-supracurstal rocks, ∼2.5 Ga and ∼2.8 Ga are solely distributed in the Oulongbuluke micro-block. The two micro-blocks have ratios of (206Pb/204Pb)t, (207Pb/204Pb)t and (206Pb/204Pb)t generally higher than 18, 15.5 and 38, respectively. These data suggest that the basements of the Oulongbuluke micro-blocks and the Qaidam micro-blocks are geochemically akin to that of the Yangtze Block, and that the Yangtze Block Domain can be extended northwestwards to the micro blocks on both sides of the Altyn-Tagh fault, and that the UHP-HP tectonic belt along the northern margin of the Qaidam micro-block is only a convergent boundary among the earlier broken up micro-blocks within the Yangtze Block.
Persistent Identifierhttp://hdl.handle.net/10722/72410
ISSN
2014 SCImago Journal Rankings: 0.265
References

 

DC FieldValueLanguage
dc.contributor.authorChen, NSen_HK
dc.contributor.authorWang, XYen_HK
dc.contributor.authorZhang, HFen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorLi, XYen_HK
dc.contributor.authorChen, Qen_HK
dc.date.accessioned2010-09-06T06:41:31Z-
dc.date.available2010-09-06T06:41:31Z-
dc.date.issued2007en_HK
dc.identifier.citationDiqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal Of China University Of Geosciences, 2007, v. 32 n. 1, p. 7-21en_HK
dc.identifier.issn1000-2383en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72410-
dc.description.abstractThe formation of major and trace elemental and Sr-Nd-Pb isotopic geochemistries in Early Paleoproterozoic Mohe pluton and Early Triassic Cahanno pluton of the Oulongbuluke micro-block and Neoproterozoic Shaliuhe pluton, Late-Permian to Early-Triaasic Xiangride pluton and Late-Triassic Keri pluton of the Qaidam Block of northwestern China, were investigated. The Shaliuhe pluton and Keri muscovite pluton are characterized by S-type and paraaluminium granite, the others are by I-type granodiorite or granite. It is concluded from the comparsion of TDM and εNd that the magma source area of the Shaliuhe granite belongs to the II-type metabasement of the Oulongbuluke micro-block, and the magma of the rest of the plutons could not originate from the exposed supracurstal sequences. The TDMare clustered at -1.5-2.3 Ga and 0.9-1.3 Ga, with peak value of ∼1.2 Ga, ∼1.6 Ga and ∼2.05 Ga for both granitoids and meta-supracurstal rocks, ∼2.5 Ga and ∼2.8 Ga are solely distributed in the Oulongbuluke micro-block. The two micro-blocks have ratios of (206Pb/204Pb)t, (207Pb/204Pb)t and (206Pb/204Pb)t generally higher than 18, 15.5 and 38, respectively. These data suggest that the basements of the Oulongbuluke micro-blocks and the Qaidam micro-blocks are geochemically akin to that of the Yangtze Block, and that the Yangtze Block Domain can be extended northwestwards to the micro blocks on both sides of the Altyn-Tagh fault, and that the UHP-HP tectonic belt along the northern margin of the Qaidam micro-block is only a convergent boundary among the earlier broken up micro-blocks within the Yangtze Block.en_HK
dc.languageengen_HK
dc.relation.ispartofDiqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciencesen_HK
dc.subjectBasemental attributeen_HK
dc.subjectGranitoidsen_HK
dc.subjectNd-Sr-Pb isotopic geochemistryen_HK
dc.subjectNW Chinaen_HK
dc.subjectQaidam and Oulongbuluke micro-blocksen_HK
dc.titleGeochemistry and Nd-Sr-Pb isotopic compositions of granitoids from qaidam and oulongbuluke micro-blocks, NW China: Constraints on basement nature and tectonic affinityen_HK
dc.typeArticleen_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-33847775305en_HK
dc.identifier.hkuros127641en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33847775305&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume32en_HK
dc.identifier.issue1en_HK
dc.identifier.spage7en_HK
dc.identifier.epage21en_HK
dc.identifier.scopusauthoridChen, NS=12796732200en_HK
dc.identifier.scopusauthoridWang, XY=7501858663en_HK
dc.identifier.scopusauthoridZhang, HF=7409191572en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridLi, XY=23469678400en_HK
dc.identifier.scopusauthoridChen, Q=35478183900en_HK

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