Laser-ablation MC-ICP-MS lead isotope microanalysis down to 10 μm: application to K-feldspar inclusions within zircon
International audience The geochemical information preserved in mineral inclusions within zircon provides new ways to decipher the evolution of the continental crust. We present a routine procedure to analyse Pb isotopes in K-feldspar minerals and mineral inclusions in zircon by LA-MC-ICP-MS, with a...
Published in: | Journal of Analytical Atomic Spectrometry |
---|---|
Main Authors: | , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2018
|
Subjects: | |
Online Access: | https://hal.umontpellier.fr/hal-01718499 https://doi.org/10.1039/c7ja00276a |
id |
ftunivnantes:oai:HAL:hal-01718499v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivnantes:oai:HAL:hal-01718499v1 2023-05-15T13:38:59+02:00 Laser-ablation MC-ICP-MS lead isotope microanalysis down to 10 μm: application to K-feldspar inclusions within zircon Delavault, Helene Dhuime, Bruno Hawkesworth, Chris Marschall, Horst University of Bristol Bristol Géosciences Montpellier Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) School of Earth Sciences Bristol University of St Andrews Scotland Institut für Geowissenschaften Frankfurt am Main Goethe-Universität Frankfurt am Main 2018 https://hal.umontpellier.fr/hal-01718499 https://doi.org/10.1039/c7ja00276a en eng HAL CCSD Royal Society of Chemistry info:eu-repo/semantics/altIdentifier/doi/10.1039/c7ja00276a hal-01718499 https://hal.umontpellier.fr/hal-01718499 doi:10.1039/c7ja00276a ISSN: 0267-9477 EISSN: 1364-5544 Journal of Analytical Atomic Spectrometry https://hal.umontpellier.fr/hal-01718499 Journal of Analytical Atomic Spectrometry, Royal Society of Chemistry, 2018, 33 (2), pp.195 - 204. ⟨10.1039/c7ja00276a⟩ MC-ICP-MS [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2018 ftunivnantes https://doi.org/10.1039/c7ja00276a 2022-08-10T06:30:53Z International audience The geochemical information preserved in mineral inclusions within zircon provides new ways to decipher the evolution of the continental crust. We present a routine procedure to analyse Pb isotopes in K-feldspar minerals and mineral inclusions in zircon by LA-MC-ICP-MS, with a spot size down to 10 μm diameter. Natural K-feldspar grains from the Shap granite (north England) were selected for their homogenous Pb isotope composition to validate the method. The Faraday cups of the Thermo Scientific Neptune Plus MC-ICP-MS were used to collect the beams for spot sizes of 150 μm and 40 μm. The average 206Pb/204Pb ratios were respectively 18.255 ± 0.27% and 18.24 ± 1.3% (2 s.d.), and they agree within their analytical uncertainties. Ion counters (MIC) were used at 10 μm to allow better determination of the low intensity signal for Pb isotopes. The 206Pb/204Pb average ratio is 18.29 ± 1.3% (2 s.d.), which is within error of the average values at spot sizes of 150 μm and 40 μm. For a 10 μm spot size internal errors on individual measurements are typically better than 1.1% (2 s.e.). K-feldspar inclusions in zircons from a monzonite intrusion in Dronning Maud Land (East Antarctica), were analysed by MIC-LA-MC-ICP-MS (10 μm spot and ∼12 μm depth). The Pb isotope ratios are similar to those previously obtained by SIMS with a Cameca IMS 1270 (∼40 × 20 μm elliptic spot and ∼2 μm depth). These SIMS data are used to validate the robustness of MIC-LA-MC-ICP-MS measurements in minute mineral inclusions. Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land East Antarctica Université de Nantes: HAL-UNIV-NANTES Dronning Maud Land East Antarctica Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) Journal of Analytical Atomic Spectrometry 33 2 195 204 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
MC-ICP-MS [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
MC-ICP-MS [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes Delavault, Helene Dhuime, Bruno Hawkesworth, Chris Marschall, Horst Laser-ablation MC-ICP-MS lead isotope microanalysis down to 10 μm: application to K-feldspar inclusions within zircon |
topic_facet |
MC-ICP-MS [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience The geochemical information preserved in mineral inclusions within zircon provides new ways to decipher the evolution of the continental crust. We present a routine procedure to analyse Pb isotopes in K-feldspar minerals and mineral inclusions in zircon by LA-MC-ICP-MS, with a spot size down to 10 μm diameter. Natural K-feldspar grains from the Shap granite (north England) were selected for their homogenous Pb isotope composition to validate the method. The Faraday cups of the Thermo Scientific Neptune Plus MC-ICP-MS were used to collect the beams for spot sizes of 150 μm and 40 μm. The average 206Pb/204Pb ratios were respectively 18.255 ± 0.27% and 18.24 ± 1.3% (2 s.d.), and they agree within their analytical uncertainties. Ion counters (MIC) were used at 10 μm to allow better determination of the low intensity signal for Pb isotopes. The 206Pb/204Pb average ratio is 18.29 ± 1.3% (2 s.d.), which is within error of the average values at spot sizes of 150 μm and 40 μm. For a 10 μm spot size internal errors on individual measurements are typically better than 1.1% (2 s.e.). K-feldspar inclusions in zircons from a monzonite intrusion in Dronning Maud Land (East Antarctica), were analysed by MIC-LA-MC-ICP-MS (10 μm spot and ∼12 μm depth). The Pb isotope ratios are similar to those previously obtained by SIMS with a Cameca IMS 1270 (∼40 × 20 μm elliptic spot and ∼2 μm depth). These SIMS data are used to validate the robustness of MIC-LA-MC-ICP-MS measurements in minute mineral inclusions. |
author2 |
University of Bristol Bristol Géosciences Montpellier Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) School of Earth Sciences Bristol University of St Andrews Scotland Institut für Geowissenschaften Frankfurt am Main Goethe-Universität Frankfurt am Main |
format |
Article in Journal/Newspaper |
author |
Delavault, Helene Dhuime, Bruno Hawkesworth, Chris Marschall, Horst |
author_facet |
Delavault, Helene Dhuime, Bruno Hawkesworth, Chris Marschall, Horst |
author_sort |
Delavault, Helene |
title |
Laser-ablation MC-ICP-MS lead isotope microanalysis down to 10 μm: application to K-feldspar inclusions within zircon |
title_short |
Laser-ablation MC-ICP-MS lead isotope microanalysis down to 10 μm: application to K-feldspar inclusions within zircon |
title_full |
Laser-ablation MC-ICP-MS lead isotope microanalysis down to 10 μm: application to K-feldspar inclusions within zircon |
title_fullStr |
Laser-ablation MC-ICP-MS lead isotope microanalysis down to 10 μm: application to K-feldspar inclusions within zircon |
title_full_unstemmed |
Laser-ablation MC-ICP-MS lead isotope microanalysis down to 10 μm: application to K-feldspar inclusions within zircon |
title_sort |
laser-ablation mc-icp-ms lead isotope microanalysis down to 10 μm: application to k-feldspar inclusions within zircon |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.umontpellier.fr/hal-01718499 https://doi.org/10.1039/c7ja00276a |
long_lat |
ENVELOPE(-64.256,-64.256,-65.246,-65.246) |
geographic |
Dronning Maud Land East Antarctica Faraday |
geographic_facet |
Dronning Maud Land East Antarctica Faraday |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica |
op_source |
ISSN: 0267-9477 EISSN: 1364-5544 Journal of Analytical Atomic Spectrometry https://hal.umontpellier.fr/hal-01718499 Journal of Analytical Atomic Spectrometry, Royal Society of Chemistry, 2018, 33 (2), pp.195 - 204. ⟨10.1039/c7ja00276a⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1039/c7ja00276a hal-01718499 https://hal.umontpellier.fr/hal-01718499 doi:10.1039/c7ja00276a |
op_doi |
https://doi.org/10.1039/c7ja00276a |
container_title |
Journal of Analytical Atomic Spectrometry |
container_volume |
33 |
container_issue |
2 |
container_start_page |
195 |
op_container_end_page |
204 |
_version_ |
1766113704549548032 |