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Volume 12 Issue 2
Jun.  2001
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Xiong Xiong, Hsu Houtze, Teng Jiwen. Cold Thermal Anomalous Structure within Lower Mantle and Its Geodynamic Implications. Journal of Earth Science, 2001, 12(2).
Citation: Xiong Xiong, Hsu Houtze, Teng Jiwen. Cold Thermal Anomalous Structure within Lower Mantle and Its Geodynamic Implications. Journal of Earth Science, 2001, 12(2).

Cold Thermal Anomalous Structure within Lower Mantle and Its Geodynamic Implications

  • Received Date: 2018-07-15
  • Rev Recd Date: 2018-07-15
  • Publish Date: 2018-07-15
  • Thelateraltemperatureanomalousstructureofthelowermantleisreconstructedfromtheseismictomographicalmodelandhightemperatureandhighpressurelaboratoryresults.Asignificantcorrelationbetweenthedistributionofthecoldanomalyandthelocationofpastsubductionbeltsshowsthattheshalloweranomalycorrespondstotheyoungersubductionsites,whilethedeeperanomalytotheolderones.Thiscorrelationalsosuggeststhatthecoldanomalymayhavecomefromthesubductionslabsandthescaleofmantleconvectionmayhavebeencompleted.Thecoldestandlargestanomalyisconcentratednearthecore~mantleboundary(CMB).Fewcoldanomaliesfloatintheshallowerandmiddlepartsofthelowermantle,suggestingthatthedownwardmigrationofthesubductionslabs,discontinuousandstep~like,maybedividedintothefollowingthreestages:subduction,stagnationatthe670kmdiscontinuityduetothephasetransition,anddisintegrationwhenthesizeexceedsthecriticalpoint.
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通讯作者: 陈斌, bchen63@163.com
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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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Cold Thermal Anomalous Structure within Lower Mantle and Its Geodynamic Implications

Abstract: Thelateraltemperatureanomalousstructureofthelowermantleisreconstructedfromtheseismictomographicalmodelandhightemperatureandhighpressurelaboratoryresults.Asignificantcorrelationbetweenthedistributionofthecoldanomalyandthelocationofpastsubductionbeltsshowsthattheshalloweranomalycorrespondstotheyoungersubductionsites,whilethedeeperanomalytotheolderones.Thiscorrelationalsosuggeststhatthecoldanomalymayhavecomefromthesubductionslabsandthescaleofmantleconvectionmayhavebeencompleted.Thecoldestandlargestanomalyisconcentratednearthecore~mantleboundary(CMB).Fewcoldanomaliesfloatintheshallowerandmiddlepartsofthelowermantle,suggestingthatthedownwardmigrationofthesubductionslabs,discontinuousandstep~like,maybedividedintothefollowingthreestages:subduction,stagnationatthe670kmdiscontinuityduetothephasetransition,anddisintegrationwhenthesizeexceedsthecriticalpoint.

Xiong Xiong, Hsu Houtze, Teng Jiwen. Cold Thermal Anomalous Structure within Lower Mantle and Its Geodynamic Implications. Journal of Earth Science, 2001, 12(2).
Citation: Xiong Xiong, Hsu Houtze, Teng Jiwen. Cold Thermal Anomalous Structure within Lower Mantle and Its Geodynamic Implications. Journal of Earth Science, 2001, 12(2).

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