Defining the Potential of Nanoscale Re-Os Isotope Systematics Using Atom Probe Microscopy
Atom probe microscopy (APM) is a relatively new in situ tool for measuring isotope fractions from nanoscale volumes (< 0.01 µm3). We calculate the theoretical detectable difference of an isotope ratio measurement result from APM using counting statistics of a hypothetical data set to be ± 4d...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Journal Article |
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Wiley-Blackwell Publishing
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/72050 |
| _version_ | 1848762645998469120 |
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| author | Daly, L. Bland, Phil Tessalina, Svetlana Saxey, David Reddy, Steven Fougerouse, Denis Rickard, William Forman, Lucy La Fontaine, A. Cairney, J. Ringer, S. Schaefer, B. Schwander, D. |
| author_facet | Daly, L. Bland, Phil Tessalina, Svetlana Saxey, David Reddy, Steven Fougerouse, Denis Rickard, William Forman, Lucy La Fontaine, A. Cairney, J. Ringer, S. Schaefer, B. Schwander, D. |
| author_sort | Daly, L. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Atom probe microscopy (APM) is a relatively new in situ tool for measuring isotope fractions from nanoscale volumes (< 0.01 µm3). We calculate the theoretical detectable difference of an isotope ratio measurement result from APM using counting statistics of a hypothetical data set to be ± 4d or 0.4% (2s). However, challenges associated with APM measurements (e.g., peak ranging, hydride formation and isobaric interferences), result in larger uncertainties if not properly accounted for. We evaluate these factors for Re-Os isotope ratio measurements by comparing APM and negative thermal ionisation mass spectrometry (N-TIMS) measurement results of pure Os, pure Re, and two synthetic Re-Os-bearing alloys from Schwander et al. (2015, Meteoritics and Planetary Science, 50, 893) [the original metal alloy (HSE) and alloys produced by heating HSE within silicate liquid (SYN)]. From this, we propose a current best practice for APM Re-Os isotope ratio measurements. Using this refined approach, mean APM and N-TIMS187Os/189Os measurement results agree within 0.05% and 2s (pure Os), 0.6–2% and 2s (SYN) and 5–10% (HSE). The good agreement of N-TIMS and APM187Os/189Os measurements confirms that APM can extract robust isotope ratios. Therefore, this approach permits nanoscale isotope measurements of Os-bearing alloys using the Re-Os geochronometer that could not be measured by conventional measurement principles. |
| first_indexed | 2025-11-14T10:50:52Z |
| format | Journal Article |
| id | curtin-20.500.11937-72050 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:50:52Z |
| publishDate | 2018 |
| publisher | Wiley-Blackwell Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-720502019-02-25T03:06:30Z Defining the Potential of Nanoscale Re-Os Isotope Systematics Using Atom Probe Microscopy Daly, L. Bland, Phil Tessalina, Svetlana Saxey, David Reddy, Steven Fougerouse, Denis Rickard, William Forman, Lucy La Fontaine, A. Cairney, J. Ringer, S. Schaefer, B. Schwander, D. Atom probe microscopy (APM) is a relatively new in situ tool for measuring isotope fractions from nanoscale volumes (< 0.01 µm3). We calculate the theoretical detectable difference of an isotope ratio measurement result from APM using counting statistics of a hypothetical data set to be ± 4d or 0.4% (2s). However, challenges associated with APM measurements (e.g., peak ranging, hydride formation and isobaric interferences), result in larger uncertainties if not properly accounted for. We evaluate these factors for Re-Os isotope ratio measurements by comparing APM and negative thermal ionisation mass spectrometry (N-TIMS) measurement results of pure Os, pure Re, and two synthetic Re-Os-bearing alloys from Schwander et al. (2015, Meteoritics and Planetary Science, 50, 893) [the original metal alloy (HSE) and alloys produced by heating HSE within silicate liquid (SYN)]. From this, we propose a current best practice for APM Re-Os isotope ratio measurements. Using this refined approach, mean APM and N-TIMS187Os/189Os measurement results agree within 0.05% and 2s (pure Os), 0.6–2% and 2s (SYN) and 5–10% (HSE). The good agreement of N-TIMS and APM187Os/189Os measurements confirms that APM can extract robust isotope ratios. Therefore, this approach permits nanoscale isotope measurements of Os-bearing alloys using the Re-Os geochronometer that could not be measured by conventional measurement principles. 2018 Journal Article http://hdl.handle.net/20.500.11937/72050 10.1111/ggr.12216 Wiley-Blackwell Publishing restricted |
| spellingShingle | Daly, L. Bland, Phil Tessalina, Svetlana Saxey, David Reddy, Steven Fougerouse, Denis Rickard, William Forman, Lucy La Fontaine, A. Cairney, J. Ringer, S. Schaefer, B. Schwander, D. Defining the Potential of Nanoscale Re-Os Isotope Systematics Using Atom Probe Microscopy |
| title | Defining the Potential of Nanoscale Re-Os Isotope Systematics Using Atom Probe Microscopy |
| title_full | Defining the Potential of Nanoscale Re-Os Isotope Systematics Using Atom Probe Microscopy |
| title_fullStr | Defining the Potential of Nanoscale Re-Os Isotope Systematics Using Atom Probe Microscopy |
| title_full_unstemmed | Defining the Potential of Nanoscale Re-Os Isotope Systematics Using Atom Probe Microscopy |
| title_short | Defining the Potential of Nanoscale Re-Os Isotope Systematics Using Atom Probe Microscopy |
| title_sort | defining the potential of nanoscale re-os isotope systematics using atom probe microscopy |
| url | http://hdl.handle.net/20.500.11937/72050 |