Geo- and cosmochemistry of the twin elements yttrium and holmium
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Pack, Andreas; Russell, Sara S; Shelley, Michael; van Zuilen, Mark
Description
We have analyzed the Y/Ho-ratios in bulk chondrites, chondrules and four Ca- and Al-rich inclusions (CAIs) from carbonaceous and unequilibrated ordinary and enstatite chondrites (EC) by laser ablation inductively coupled mass spectrometry (LA-ICPMS). We demonstrate that bulk rock sample preparation by containerless melting is a suitable method for preparation of bulk rock samples for high-precision LA-ICPMS. Bulk chondrites have variable Y/Ho-ratios. Carbonaceous chondrites (CI1, CM2, CV3, and...[Show more]
dc.contributor.author | Pack, Andreas | |
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dc.contributor.author | Russell, Sara S | |
dc.contributor.author | Shelley, Michael | |
dc.contributor.author | van Zuilen, Mark | |
dc.date.accessioned | 2015-12-10T22:45:38Z | |
dc.identifier.issn | 1872-9533 | |
dc.identifier.uri | http://hdl.handle.net/1885/58592 | |
dc.description.abstract | We have analyzed the Y/Ho-ratios in bulk chondrites, chondrules and four Ca- and Al-rich inclusions (CAIs) from carbonaceous and unequilibrated ordinary and enstatite chondrites (EC) by laser ablation inductively coupled mass spectrometry (LA-ICPMS). We demonstrate that bulk rock sample preparation by containerless melting is a suitable method for preparation of bulk rock samples for high-precision LA-ICPMS. Bulk chondrites have variable Y/Ho-ratios. Carbonaceous chondrites (CI1, CM2, CV3, and CK4) have a common Y/Ho-ratio (25.94 ± 0.08, 2σ) that is regarded as the solar system Y/Ho-ratio. The Y/Ho-ratio increases from carbonaceous, through ordinary (LL, L, H) to enstatite chondrites (EL6), which show the highest Y/Ho-ratio of 27.25. We discuss the result with respect to the origin of fractionation of Re and Os between chondrite groups. Within analytical error, Y and Ho show a good correlation in OC and CV3 chondrules and define an Y/Ho-ratio of 26.22 ± 0.40 (2σ). Y/Ho-fractionation in Ca- and Al-rich inclusions is related to differences in volatility. The bulk silicate Earth is suggested to have a solar Y/Ho-ratio and links the Earth with carbonaceous chondrites. Y/Ho variations in primitive and differentiated terrestrial igneous rocks are discussed in framework of incompatibility of Y and Ho during partial melting. Applicability of Y/Ho as tracer for or against a sedimentary origin of the putative host rock of the Earth's oldest traces of life from the island of Akilia is briefly discussed. | |
dc.publisher | Pergamon-Elsevier Ltd | |
dc.source | Geochimica et Cosmochimica Acta | |
dc.subject | Keywords: carbonaceous chondrite; chondrule; cosmochemistry; inductively coupled plasma method; isotopic fractionation; isotopic ratio; laser; yttrium; Akilia; Arctic; Greenland | |
dc.title | Geo- and cosmochemistry of the twin elements yttrium and holmium | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 71 | |
dc.date.issued | 2007 | |
local.identifier.absfor | 040499 - Geophysics not elsewhere classified | |
local.identifier.ariespublication | u4167262xPUB449 | |
local.type.status | Published Version | |
local.contributor.affiliation | Pack, Andreas, CNRS centre de Recherche Petrographiques et Geochimiques | |
local.contributor.affiliation | Russell, Sara S, The Natural History Museum, | |
local.contributor.affiliation | Shelley, Michael, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | van Zuilen, Mark, CNRS centre de Recherche Petrographiques et Geochimiques | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 18 | |
local.bibliographicCitation.startpage | 4592 | |
local.bibliographicCitation.lastpage | 4608 | |
local.identifier.doi | 10.1016/j.gca.2007.07.010 | |
dc.date.updated | 2015-12-09T11:22:36Z | |
local.identifier.scopusID | 2-s2.0-34548564362 | |
Collections | ANU Research Publications |
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