Three Natural Andesitic to Rhyolitic Glasses (OJY‐1, OH‐1, OA‐1) as Reference Materials for In Situ Microanalysis. Issue 4 (14th August 2022)

• Record Type: Journal Article
• Authors: Wu, Shitou; Audétat, Andreas; Jochum, Klaus Peter; Wang, Hao; Chen, Jingyuan; Stoll, Brigitte; Zhang, Chao; Bao, Zhian; Yang, Shuiyuan; Li, Chaofeng; Wang, Xuefeng; Xu, Chunxue; Xu, Lei; Huang, Chao; Xie, Liewen; Yang, Yueheng; Yang, Jinhui
• Is Part Of: Geostandards and geoanalytical research. Volume 46:Issue 4(2022)
• Page Start: 673
• Page End: 700
• Publication Date: 2022-08-14
• Subjects: natural geological glass -- reference material -- in situ microanalysis -- LA‐ICP‐MS -- EPMA; Analytical geochemistry -- Periodicals; Géochimie analytique -- Périodiques; 551.9
• DOI: 10.1111/ggr.12449
• Languages: English
• ISSNs: 1639-4488

Abstract

Abstract : Three natural geological glasses (andesitic glass OJY‐1, and rhyolitic obsidians OH‐1 and OA‐1) of specimen sizes 50–150 g were characterised as reference materials for in situ microanalysis of major and trace elements, and Pb isotope ratios. Utilised techniques include isotope‐dilution analyses by TIMS and MC‐ICP‐MS, bulk analyses by XRF, ICP‐OES, ICP‐MS, and microanalysis (10–120 μm spot size) by electron probe microanalyser, LA‐ICP‐MS and LA‐MC‐ICP‐MS. Microanalyses (10–120 μm) indicate that all three glasses are homogeneous with respect to fifty‐four out of fifty‐eight determined elements and Pb isotope ratios, except for Ni in OJY‐1, and Cu, Zr and Ce in OH‐1. The determination of reference values as well as their uncertainties at the 95% confidence level closely followed International Organization for Standardization (ISO) guidelines and the certification protocol of the International Association of Geoanalysts (IAG). These three glasses are fully natural without any subsequent heat treatment, and they represent useful additions to the widely distributed MPI‐DING, USGS and CGSG reference glasses for microanalytical techniques such as electron probe microanalysis, μ‐XRF, LA‐ICP‐MS and SIMS. Key Points: Three natural geological glasses are characterised as reference materials for in situ microanalysis. The homogeneity of major, trace elements and Pb isotope ratios are evaluated using EPMA, LA-ICP-MS and LA-MC-ICP-MS. The reference values are determined using multiple techniques (ID-TIMS, ID-MC-ICP-MS, XRF, ICP-OES, ICP-MS, EPMA, LA-ICP-MS, LA-MC-ICP-MS).