Evidence against a chondritic Earth

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dc.contributor.authorCampbell, Ian
dc.contributor.authorO'Neill, Hugh
dc.date.accessioned2015-12-10T23:12:03Z
dc.date.issued2012
dc.date.updated2016-02-24T09:43:25Z
dc.description.abstractThe 142Nd/ 144 Nd ratio of the Earth is greater than the solar ratio as inferred from chondritic meteorites, which challenges a fundamental assumption of modern geochemistry-that the composition of the silicate Earth is chondritic', meaning that it has refractory element ratios identical to those found in chondrites. The popular explanation for this and other paradoxes of mantle geochemistry, a hidden layer deep in the mantle enriched in incompatible elements, is inconsistent with the heat flux carried by mantle plumes. Either the matter from which the Earth formed was not chondritic, or the Earth has lost matter by collisional erosion in the later stages of planet formation.
dc.identifier.issn0028-0836
dc.identifier.urihttp://hdl.handle.net/1885/63946
dc.publisherMacmillan Publishers Ltd
dc.sourceNature
dc.subjectKeywords: silicate; chondrite; collision zone; geochemistry; heat flux; mantle plume; meteorite; neodymium isotope; silicate; astronomy; environmental erosion; geochemistry; priority journal; review
dc.titleEvidence against a chondritic Earth
dc.typeJournal article
local.bibliographicCitation.issue7391
local.bibliographicCitation.lastpage558
local.bibliographicCitation.startpage553
local.contributor.affiliationCampbell, Ian, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationO'Neill, Hugh, College of Physical and Mathematical Sciences, ANU
local.contributor.authoremailu8300206@anu.edu.au
local.contributor.authoruidCampbell, Ian, u8300206
local.contributor.authoruidO'Neill, Hugh, u8101317
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor040202 - Inorganic Geochemistry
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
local.identifier.ariespublicationf5625xPUB867
local.identifier.citationvolume483
local.identifier.doi10.1038/nature10901
local.identifier.scopusID2-s2.0-84859174719
local.identifier.thomsonID000302006100030
local.identifier.uidSubmittedByf5625
local.type.statusPublished Version

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