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dc.contributor.authorFrost, DA
dc.contributor.authorAvery, MS
dc.contributor.authorBuffett, BA
dc.contributor.authorChidester, BA
dc.contributor.authorDeng, J
dc.contributor.authorDorfman, SM
dc.contributor.authorLi, Z
dc.contributor.authorLiu, L
dc.contributor.authorLv, M
dc.contributor.authorMartin, JF
dc.date.accessioned2022-02-28T23:00:10Z
dc.date.available2022-02-28T23:00:10Z
dc.date.issued2022
dc.date.submitted2021-03-05
dc.identifier.citationGeochemistry, Geophysics, Geosystems, volume 23, issue 3, page e2021GC009764
dc.identifier.issn1525-2027
dc.identifier.otherggge22758
dc.identifier.other2021gc009764
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/334516
dc.description.abstractAbstract: Heat flux from the core to the mantle provides driving energy for mantle convection thus powering plate tectonics, and contributes a significant fraction of the geothermal heat budget. Indirect estimates of core‐mantle boundary heat flow are typically based on petrological evidence of mantle temperature, interpretations of temperatures indicated by seismic travel times, experimental measurements of mineral melting points, physical mantle convection models, or physical core convection models. However, previous estimates have not consistently integrated these lines of evidence. In this work, an interdisciplinary analysis is applied to co‐constrain core‐mantle boundary heat flow and test the thermal boundary layer (TBL) theory. The concurrence of TBL models, energy balance to support geomagnetism, seismology, and review of petrologic evidence for historic mantle temperatures supports QCMB ∼15 TW, with all except geomagnetism supporting as high as ∼20 TW. These values provide a tighter constraint on core heat flux relative to previous work. Our work describes the seismic properties consistent with a TBL, and supports a long‐lived basal mantle molten layer through much of Earth's history.
dc.languageen
dc.publisherAmerican Geophysical Union (AGU)
dc.subjectGEOCHEMISTRY
dc.subjectGeochemical modeling
dc.subjectGEODESY AND GRAVITY
dc.subjectEarth's interior: composition and state
dc.subjectEarth's interior: dynamics
dc.subjectGEOMAGNETISM AND PALEOMAGNETISM
dc.subjectCore processes
dc.subjectMINERALOGY AND PETROLOGY
dc.subjectSEISMOLOGY
dc.subjectMantle
dc.subjectCore
dc.subjectTECTONOPHYSICS
dc.subjectContinental margins: divergent
dc.subjectDynamics of lithosphere and mantle: general
dc.subjectVOLCANOLOGY
dc.subjectResearch Article
dc.subjectheat budget
dc.subjectthermal boundary layer
dc.subjectpetrology
dc.subjectgeodynamics
dc.subjectgeomagnetics
dc.subjectseismology
dc.titleMultidisciplinary Constraints on the Thermal-Chemical Boundary Between Earth's Core and Mantle
dc.typeArticle
dc.date.updated2022-02-28T23:00:09Z
prism.publicationNameGeochemistry, Geophysics, Geosystems
dc.identifier.doi10.17863/CAM.81934
dcterms.dateAccepted2022-01-31
rioxxterms.versionofrecord10.1029/2021GC009764
rioxxterms.versionAO
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidFrost, DA [0000-0001-7882-5166]
dc.contributor.orcidAvery, MS [0000-0002-8504-7072]
dc.contributor.orcidBuffett, BA [0000-0001-5488-7602]
dc.contributor.orcidChidester, BA [0000-0002-4103-7606]
dc.contributor.orcidDeng, J [0000-0001-5441-2797]
dc.contributor.orcidDorfman, SM [0000-0002-3968-9592]
dc.contributor.orcidLi, Z [0000-0001-5657-655X]
dc.contributor.orcidLiu, L [0000-0002-3232-0151]
dc.contributor.orcidLv, M [0000-0003-3477-5560]
dc.identifier.eissn1525-2027
pubs.funder-project-idEuropean Research Council (804071)
cam.issuedOnline2022-02-28


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