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Three New Geochemical Reference Materials for Mineral Exploration and Environmental Contamination Studies: SdAR‐L2, SdAR‐M2 and SdAR‐H1

Wilson, Stephen A.; Potts, Philip J. and Webb, Peter C. (2019). Three New Geochemical Reference Materials for Mineral Exploration and Environmental Contamination Studies: SdAR‐L2, SdAR‐M2 and SdAR‐H1. Geostandards and Geoanalytical Research (Early Access).

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DOI (Digital Object Identifier) Link: https://doi.org/10.1111/ggr.12300
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Abstract

The preparation and certification of three new sediment‐based reference materials SdAR‐L2 (Blended sediment), SdAR‐M2 (Metal‐rich sediment) and SdAR‐H1 (Metalliferous sediment) described in this paper involved collaboration between the U.S. Geological Survey (USGS) and International Association of Geoanalysts (IAG). Sediments and soils from six locations in the western United States were mixed according to a USGS‐designed blending programme that calculate the proportions of source materials required to match target mass fractions and minimise the number of elements with mass fractions below instrument detection limits. For selected element mass fractions, NIST SRMs 2709–2711 provided target values. By using this approach, the three reference materials retained a natural mineralogy that is so essential for matching matrix and dissolution characteristics. Geochemical characterisation of these materials was carried out through the IAG GeoPT proficiency testing programme. Three independent rounds of GeoPT testing were used, each providing results from over eighty laboratories. Compiled results were statistically evaluated to produce reference values for over forty elements in each material. Reference and information values as well as mineralogical compositions are presented to establish these samples as reference materials especially for use in mineral exploration and environmental contamination monitoring studies.

Item Type: Journal Item
Copyright Holders: 2019 The Authors. Geostandards and Geoanalytical Research, 2019 International Association of Geoanalysts
ISSN: 1751-908X
Keywords: United States; Geological Survey; USGS; IAG; geochemical; environmental materials; geochemical reference materials; geological reference materials; sediment
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 67394
SWORD Depositor: Jisc Publications-Router
Depositing User: Jisc Publications-Router
Date Deposited: 21 Oct 2019 09:12
Last Modified: 02 Jul 2020 10:01
URI: http://oro.open.ac.uk/id/eprint/67394
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