Geo- and cosmochemistry of the twin elements yttrium and holmium
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...
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/58592 2023-05-15T15:11:56+02:00 Geo- and cosmochemistry of the twin elements yttrium and holmium Pack, Andreas Russell, Sara S Shelley, Michael van Zuilen, Mark 2015-12-10T22:45:38Z http://hdl.handle.net/1885/58592 unknown Pergamon-Elsevier Ltd 1872-9533 http://hdl.handle.net/1885/58592 Geochimica et Cosmochimica Acta Keywords: carbonaceous chondrite chondrule cosmochemistry inductively coupled plasma method isotopic fractionation isotopic ratio laser yttrium Akilia Arctic Greenland Journal article 2015 ftanucanberra 2015-12-28T23:30:24Z 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. Article in Journal/Newspaper Arctic Greenland Australian National University: ANU Digital Collections Arctic Greenland The ''Y'' ENVELOPE(-112.453,-112.453,57.591,57.591) |
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Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: carbonaceous chondrite chondrule cosmochemistry inductively coupled plasma method isotopic fractionation isotopic ratio laser yttrium Akilia Arctic Greenland |
spellingShingle |
Keywords: carbonaceous chondrite chondrule cosmochemistry inductively coupled plasma method isotopic fractionation isotopic ratio laser yttrium Akilia Arctic Greenland Pack, Andreas Russell, Sara S Shelley, Michael van Zuilen, Mark Geo- and cosmochemistry of the twin elements yttrium and holmium |
topic_facet |
Keywords: carbonaceous chondrite chondrule cosmochemistry inductively coupled plasma method isotopic fractionation isotopic ratio laser yttrium Akilia Arctic Greenland |
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 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. |
format |
Article in Journal/Newspaper |
author |
Pack, Andreas Russell, Sara S Shelley, Michael van Zuilen, Mark |
author_facet |
Pack, Andreas Russell, Sara S Shelley, Michael van Zuilen, Mark |
author_sort |
Pack, Andreas |
title |
Geo- and cosmochemistry of the twin elements yttrium and holmium |
title_short |
Geo- and cosmochemistry of the twin elements yttrium and holmium |
title_full |
Geo- and cosmochemistry of the twin elements yttrium and holmium |
title_fullStr |
Geo- and cosmochemistry of the twin elements yttrium and holmium |
title_full_unstemmed |
Geo- and cosmochemistry of the twin elements yttrium and holmium |
title_sort |
geo- and cosmochemistry of the twin elements yttrium and holmium |
publisher |
Pergamon-Elsevier Ltd |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/58592 |
long_lat |
ENVELOPE(-112.453,-112.453,57.591,57.591) |
geographic |
Arctic Greenland The ''Y'' |
geographic_facet |
Arctic Greenland The ''Y'' |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Geochimica et Cosmochimica Acta |
op_relation |
1872-9533 http://hdl.handle.net/1885/58592 |
_version_ |
1766342707131711488 |