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https://hdl.handle.net/2440/126919
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dc.contributor.author | Gilbert, S. | - |
dc.contributor.author | Glorie, S.M. | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Journal of Analytical Atomic Spectrometry, 2020; 35(7):1472-1481 | - |
dc.identifier.issn | 0267-9477 | - |
dc.identifier.issn | 1364-5544 | - |
dc.identifier.uri | http://hdl.handle.net/2440/126919 | - |
dc.description.abstract | LA-ICP-MS U–Pb dating is one of the most commonly used geochronology methods for dating minerals such as zircon, apatite, monazite and titanite. However, many of these U-bearing minerals also contain non-radiogenic common Pb, which requires correction to accurately determine the age of the mineral. Correction methods include: determining the ²⁰⁷Pb/²⁰⁶Pb common-Pb ratio; the iterative Andersen (2002) method using the measured ²⁰⁶Pb/²³⁸U, ²⁰⁷Pb/²³⁵U and ²⁰⁷Pb/²⁰⁶Pb; using ²⁰⁸Pb for low Th-bearing minerals; or using the non-radiogenic ²⁰⁴Pb. To date, the ²⁰⁴Pb correction method has been limited by the isobaric interference from ²⁰⁴Hg, which requires mathematical correction by measuring ²⁰²Hg. In this study we demonstrate that for LA-ICP-MS analysis, the Hg interference can efficiently be removed by a charge transfer reaction using NH₃ gas in the reaction cell of an Agilent 8900 ICP-MS/MS, without any additional interference correction required. We demonstrate the applicability of the ²⁰⁴Pb correction method using a range of common Pb bearing apatites and titanites. The use of LA-ICP-MS/MS enables accurate ²⁰⁴Pb correction at ²⁰⁴Pb sensitivity lower than could be corrected previously. | - |
dc.description.statementofresponsibility | Sarah E. Gilbert and Stijn Glorie | - |
dc.language.iso | en | - |
dc.publisher | Royal Society of Chemistry | - |
dc.rights | This journal is © The Royal Society of Chemistry 2020 | - |
dc.source.uri | http://dx.doi.org/10.1039/d0ja00224k | - |
dc.title | Removal of Hg interferences for common Pb correction when dating apatite and titanite by LA-ICP-MS/MS | - |
dc.type | Journal article | - |
dc.contributor.conference | Goldschmidt 2019 | - |
dc.identifier.doi | 10.1039/D0JA00224K | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP200101881 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Gilbert, S. [0000-0003-3259-7983] | - |
dc.identifier.orcid | Glorie, S.M. [0000-0002-3107-9028] | - |
Appears in Collections: | Adelaide Microscopy publications Aurora harvest 4 Geology & Geophysics publications |
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