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Volume 18 Issue 2
Apr.  2007
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周炼, 高山, 刘勇胜. Nd Isotopes and Geochemistry of Phanerozoic Clastic Sedimentary Rocks from the Yangtze Block and Their Tectonic Implications. Journal of Earth Science, 2007, 18(2).
Citation: 周炼, 高山, 刘勇胜. Nd Isotopes and Geochemistry of Phanerozoic Clastic Sedimentary Rocks from the Yangtze Block and Their Tectonic Implications. Journal of Earth Science, 2007, 18(2).

Nd Isotopes and Geochemistry of Phanerozoic Clastic Sedimentary Rocks from the Yangtze Block and Their Tectonic Implications

  • Received Date: 2018-07-15
  • Rev Recd Date: 2018-07-15
  • Publish Date: 2018-07-15
  • ThisarticlepresentsSm-Ndandgeochemicaldataonfine-grainedsedimentsofthenorthernmarginfromtheYangtzeblock,China,tounderstandthevariationsofNdisotopiccompositionsandcrustalevolutionhistoryinthisarea.Theresultsareasfollows:(1)NdisotopiccompositionsforclasticsedimentaryrocksoftheMiddle–LateProterozoichaverelativelypositiveNd(t)values(+2.72to+0.69),withNdmodelagesfrom1.38Gato1.55Ga,correspondingtothecontemporaneousvolcanicrocksfromtheXixiang(西乡)Group.Thisindicatesthatthearc-relatedmaterialsfromMiddle–LateProterozoicdominatetheprovenancesoftheMiddle–LateProterozoicperiods.(2)ThegradualdecreaseinεNd(t)duringtheCambrian–CarboniferousperiodsislikelytoreflecttheprogressivelyincreasingproportionoferosionmaterialsfromtheFoping(佛坪)andQinling(秦岭)complexes,correspondingtoagraduallydecreasingtrendintheLa/Thratios.(3)AprominentincreaseintheεNd(t)valueoftheLatePermianstrataprobablyreflectsthesignificantincorporationofthemantle-derivedmaterials.ThetraceelementdataarecomparedwithdataoftheEmeishan(峨嵋山)floodbasalts.ThesedataindicatethatthevolcanicdusthasbeenaddedtotheLatePermianstrataduringtheLatePermian,representedbyperiodsofextremelyhighEmeishanfloodbasaltactivityinthesouth-easternmarginoftheYangtzeblock.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Nd Isotopes and Geochemistry of Phanerozoic Clastic Sedimentary Rocks from the Yangtze Block and Their Tectonic Implications

Abstract: ThisarticlepresentsSm-Ndandgeochemicaldataonfine-grainedsedimentsofthenorthernmarginfromtheYangtzeblock,China,tounderstandthevariationsofNdisotopiccompositionsandcrustalevolutionhistoryinthisarea.Theresultsareasfollows:(1)NdisotopiccompositionsforclasticsedimentaryrocksoftheMiddle–LateProterozoichaverelativelypositiveNd(t)values(+2.72to+0.69),withNdmodelagesfrom1.38Gato1.55Ga,correspondingtothecontemporaneousvolcanicrocksfromtheXixiang(西乡)Group.Thisindicatesthatthearc-relatedmaterialsfromMiddle–LateProterozoicdominatetheprovenancesoftheMiddle–LateProterozoicperiods.(2)ThegradualdecreaseinεNd(t)duringtheCambrian–CarboniferousperiodsislikelytoreflecttheprogressivelyincreasingproportionoferosionmaterialsfromtheFoping(佛坪)andQinling(秦岭)complexes,correspondingtoagraduallydecreasingtrendintheLa/Thratios.(3)AprominentincreaseintheεNd(t)valueoftheLatePermianstrataprobablyreflectsthesignificantincorporationofthemantle-derivedmaterials.ThetraceelementdataarecomparedwithdataoftheEmeishan(峨嵋山)floodbasalts.ThesedataindicatethatthevolcanicdusthasbeenaddedtotheLatePermianstrataduringtheLatePermian,representedbyperiodsofextremelyhighEmeishanfloodbasaltactivityinthesouth-easternmarginoftheYangtzeblock.

周炼, 高山, 刘勇胜. Nd Isotopes and Geochemistry of Phanerozoic Clastic Sedimentary Rocks from the Yangtze Block and Their Tectonic Implications. Journal of Earth Science, 2007, 18(2).
Citation: 周炼, 高山, 刘勇胜. Nd Isotopes and Geochemistry of Phanerozoic Clastic Sedimentary Rocks from the Yangtze Block and Their Tectonic Implications. Journal of Earth Science, 2007, 18(2).

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