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Minerals 2016, 6(3), 96; doi:10.3390/min6030096

Pb-Isotopic Study of Galena by LA-Q-ICP-MS: Testing a New Methodology with Applications to Base-Metal Sulphide Deposits

Department of Earth Sciences, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
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Author to whom correspondence should be addressed.
Academic Editors: Cristiana L. Ciobanu and Nigel J. Cook
Received: 31 May 2016 / Revised: 26 August 2016 / Accepted: 2 September 2016 / Published: 15 September 2016
(This article belongs to the Special Issue Advances in Mineral Analytical Techniques)
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Abstract

In situ laser ablation quadrupole inductively coupled plasma mass spectrometry was used to measure Pb isotopes in galena. Data acquisition was optimized by adjusting spot size, energy density, and ablation time to obtain near steady-state low relative standard deviation (%RSD) signals. Standard-sample bracketing using in-house Broken Hill galena as external reference standard was used and offline data reduction was carried out using VizualAge for Iolite3. Using this methodology, galena grain in polished thin sections from selected massive sulphide deposits of the Bathurst Mining Camp, Canada, were tested and compared to previously published data. Absolute values and errors on the weighted mean of ~20 individual analyses from each sample compared favourably with whole-rock Pb-Pb isotope data. This approach provides a mean to obtain rapid, accurate, and moderately (0.1% 2σ) precise Pb isotope measurements in galena and is particularly well suited for exploratory or reconnaissance studies. Further refinement of this approach may be useful in exploration for volcanogenic massive sulphides deposits and might be a useful vectoring tool when complemented with other conventional exploration techniques. View Full-Text
Keywords: Bathurst Mining Camp (BMC); Broken Hill; galena; iolite; LA-Q-ICP-MS; Pb isotopes; vectoring tool; volcanogenic massive sulphides (VMS) Bathurst Mining Camp (BMC); Broken Hill; galena; iolite; LA-Q-ICP-MS; Pb isotopes; vectoring tool; volcanogenic massive sulphides (VMS)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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McFarlane, C.R.M.; Soltani Dehnavi, A.; Lentz, D.R. Pb-Isotopic Study of Galena by LA-Q-ICP-MS: Testing a New Methodology with Applications to Base-Metal Sulphide Deposits. Minerals 2016, 6, 96.

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