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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
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TitleGeochemistry and Nd-Sr-Pb isotopic compositions of granitoids from qaidam and oulongbuluke micro-blocks, NW China: Constraints on basement nature and tectonic affinity
 
AuthorsChen, NS1
Wang, XY1
Zhang, HF1
Sun, M2
Li, XY1
Chen, Q1
 
KeywordsBasemental attribute
Granitoids
Nd-Sr-Pb isotopic geochemistry
NW China
Qaidam and Oulongbuluke micro-blocks
 
Issue Date2007
 
CitationDiqiu 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.
 
ISSN1000-2383
2013 SCImago Journal Rankings: 0.364
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorChen, NS
 
dc.contributor.authorWang, XY
 
dc.contributor.authorZhang, HF
 
dc.contributor.authorSun, M
 
dc.contributor.authorLi, XY
 
dc.contributor.authorChen, Q
 
dc.date.accessioned2010-09-06T06:41:31Z
 
dc.date.available2010-09-06T06:41:31Z
 
dc.date.issued2007
 
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.
 
dc.description.naturelink_to_subscribed_fulltext
 
dc.identifier.citationDiqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal Of China University Of Geosciences, 2007, v. 32 n. 1, p. 7-21 [How to Cite?]
 
dc.identifier.epage21
 
dc.identifier.hkuros127641
 
dc.identifier.issn1000-2383
2013 SCImago Journal Rankings: 0.364
 
dc.identifier.issue1
 
dc.identifier.scopuseid_2-s2.0-33847775305
 
dc.identifier.spage7
 
dc.identifier.urihttp://hdl.handle.net/10722/72410
 
dc.identifier.volume32
 
dc.languageeng
 
dc.relation.ispartofDiqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences
 
dc.relation.referencesReferences in Scopus
 
dc.subjectBasemental attribute
 
dc.subjectGranitoids
 
dc.subjectNd-Sr-Pb isotopic geochemistry
 
dc.subjectNW China
 
dc.subjectQaidam and Oulongbuluke micro-blocks
 
dc.titleGeochemistry and Nd-Sr-Pb isotopic compositions of granitoids from qaidam and oulongbuluke micro-blocks, NW China: Constraints on basement nature and tectonic affinity
 
dc.typeArticle
 
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<description.abstract>The 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 &#949;Nd 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 &#8764;1.2 Ga, &#8764;1.6 Ga and &#8764;2.05 Ga for both granitoids and meta-supracurstal rocks, &#8764;2.5 Ga and &#8764;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.</description.abstract>
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<subject>Nd-Sr-Pb isotopic geochemistry</subject>
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Author Affiliations
  1. China University of Geosciences
  2. The University of Hong Kong