Geostandards and Geoanalytical Research最新文献

{"title":"IAG Membership Information","authors":"","doi":"10.1111/ggr.70012","DOIUrl":"https://doi.org/10.1111/ggr.70012","url":null,"abstract":"","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.70012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kuppusami Govindaraju (1928–2025) – Founding editor of Geostandards Newsletter","authors":"Edward A. Williams, Philip J. Potts","doi":"10.1111/ggr.70011","DOIUrl":"https://doi.org/10.1111/ggr.70011","url":null,"abstract":"","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"445-453"},"PeriodicalIF":3.4,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GGR Handbook of Rock and Mineral Analysis Chapter 16 Nano-Imaging for Advanced X-Ray Fluorescence and Absorption Spectroscopy Applications","authors":"Alexandre S. Simionovici,&nbsp;Laurence Lemelle","doi":"10.1111/ggr.70007","DOIUrl":"https://doi.org/10.1111/ggr.70007","url":null,"abstract":"<p>This chapter (Nano-Imaging for Advanced X-ray Fluorescence and Absorption Spectroscopy Applications) is a contribution to the <i>Geostandards and Geoanalytical Research Handbook of Rock and Mineral Analysis</i> – an online textbook that is a fully revised and updated edition of <i>A Handbook of Silicate Rock Analysis</i> (P. J. Potts, 1987, Blackie, Glasgow).</p><p>Chapter 16 (from Section 3 of the handbook devoted to microbeam techniques) has been designed to provide a coherent progression, starting with a brief introduction of the essential fundamentals and the practical information needed to understand the experimental specifics of nano-XRF imaging. This concise yet crucial information is followed by a comprehensive presentation of current applications of nano-XRF imaging, with examples showcasing elemental measurement and XAS applications based on nano-XRF imaging. To conclude, the final section offers a brief overview of emerging perspectives that should be of particular interest to young researchers at the beginning of their careers.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"495-533"},"PeriodicalIF":3.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.70007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GGR Handbook of Rock and Mineral Analysis Chapter 12 Laser Ablation-ICP-MS for the In Situ Analysis of Geological Samples","authors":"Leonid V. Danyushevsky,&nbsp;Jay M. Thompson","doi":"10.1111/ggr.70004","DOIUrl":"https://doi.org/10.1111/ggr.70004","url":null,"abstract":"<p>This chapter (Laser Ablation-ICP-MS for the <i>In Situ</i> Analysis of Geological Samples) is a contribution to the <i>Geostandards and Geoanalytical Research Handbook of Rock and Mineral Analysis</i> – an online textbook that is a fully revised and updated edition of <i>A Handbook of Silicate Rock Analysis</i> (P. J. Potts, 1987, Blackie, Glasgow).</p><p>This Chapter (from Section 3 of the handbook dealing with microbeam analytical techniques) presents an overview of fundamental aspects of laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) and its application relevant to multi-element measurement and U-Pb dating of geological samples. The chapter describes instrumentation currently used for LA-ICP-MS, physical processes that occur at the ablation site, during aerosol transport and in the ICP, and approaches to quantification of LA-ICP-MS data. Description of laser ablation microprobes focuses on their design aspects that affect analytical performance such as the source of laser light, configuration of the optical path of the laser beam, and the design of the sample cell. Description of ICP-MS instruments focuses on the implications of using single collector mass spectrometers, which are currently the most common type of ICP-MS instruments used for LA-ICP-MS. Description of the tubing connecting laser microprobes to ICP-MS instruments focuses on the impact of its configuration on the uncertainty of LA-ICP-MS measurement results. The description of physical processes includes aspects of the ablation process, digestion of laser ablation aerosol in a dry ICP, and down-hole fractionation during ablation at a fixed location on the sample. Description of approaches to quantification of LA-ICP-MS data covers internal standardisation, calibration of ICP-MS instrument response during analytical runs, matrix effects, use of secondary reference material, interferences and memory effects.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"457-493"},"PeriodicalIF":3.4,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved Precision and Reference Materials for Stable Carbon Isotope Measurement in Basaltic Glasses using Secondary Ion Mass Spectrometry","authors":"Joshua Shea,&nbsp;Ery Hughes,&nbsp;Robert Balzer,&nbsp;Ilya Bindeman,&nbsp;Jon Blundy,&nbsp;Richard Brooker,&nbsp;Roman Botcharnikov,&nbsp;Pierre Cartigny,&nbsp;EIMF,&nbsp;Glenn Gaetani,&nbsp;Geoff Kilgour,&nbsp;John Maclennan,&nbsp;Brian Monteleone,&nbsp;David A. Neave,&nbsp;Oliver Shorttle","doi":"10.1111/ggr.12609","DOIUrl":"https://doi.org/10.1111/ggr.12609","url":null,"abstract":"<p>We introduce three new synthetic basalt reference materials and a new high-precision set-up for stable carbon isotope measurement in basaltic glasses using a large-geometry secondary ion mass spectrometry (SIMS) instrument. The new reference materials, characterised for carbon mass fraction and isotope composition, show homogeneity for <i>in situ</i> analysis for the reported set-up. Their bulk hydrogen mass fraction and isotope ratios are reported. Our SIMS protocol uses multi-collection, cycling between concurrent measurements of ¹²C and ¹³C on electron multipliers, and either ³⁰Si or ¹⁸O, as a reference mass, on a 10¹¹ Ω resistor Faraday cup. This set-up achieves high measurement repeatability for δ¹³C down to ± 0.35‰ 1RSE at 1706 ⁺⁸⁹/_-88 μg g^-1 CO₂, with ± 1.00‰ 1RSE or better between 163 ^+5.1/_-5.2 and 267 ^+8.9/_-8.9 μg g^-1 CO₂, using a 10 nA primary beam current and a 40 μm analytical pit over a 100 cycle analysis. Carbon blanks were characterised by measuring carbon-free olivines, allowing for blank corrections on δ¹³C measurements. After blank and instrument mass fractionation corrections, we measure δ¹³C in glasses down to 26.16 ^+0.85/_-0.86 μg g^-1 CO₂ with a final measurement standard sample deviation of ± 2.97‰ 1<i>s</i>. We report <i>in situ</i> measurements on an ocean floor basaltic glass and a set of synthetic basaltic glasses to demonstrate our approach. Reference materials and the SIMS set-up improve the accuracy and precision of δ¹³C measurements in natural basaltic glasses across a wide range of geologically relevant carbon contents.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"607-627"},"PeriodicalIF":3.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12609","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of Ag in Geological Materials by Isotope Dilution ICP-MS Using NH4HF2 Digestion and Interference Removal via Ammonia Coprecipitation","authors":"Tao He,&nbsp;Hui Cao,&nbsp;Wang Lang,&nbsp;Zhaochu Hu,&nbsp;Zaicong Wang,&nbsp;Zongqi Zou,&nbsp;Wen Zhang,&nbsp;Haihong Chen,&nbsp;Yongsheng Liu","doi":"10.1111/ggr.12614","DOIUrl":"https://doi.org/10.1111/ggr.12614","url":null,"abstract":"<p>Silver is a powerful geochemical tracer in various geological processes (e.g., hydrothermal deposit formation and evolution of the terrestrial and Martian mantles). The measurement of the ultra-trace Ag (&lt; 0.1 μg g^-1) in geological samples by ICP-MS is often hindered due to serious polyatomic interferences arising from Zr, Nb and Y elements presented in samples. In this study, a simple and rapid ammonia coprecipitation method was developed to remove interference elements (Zr, Nb and Y) in NH₄HF₂ digests for the determination of Ag mass fractions in geological materials by isotope dilution ICP-MS (ID-ICP-MS). The removal of interference elements (Zr, Nb and Y) in digestion solutions of geological materials was achieved using ammonia coprecipitation, effectively eliminating their polyatomic interferences. To compensate for the incomplete recovery of Ag during ammonia coprecipitation, isotope dilution calibration was chosen over internal standard calibration to achieve final accurate results. The limit of quantitation for Ag using the proposed method was 1.83 ng g^-1. The results obtained for Ag mass fractionation in nine international geological reference materials were in good agreement with the published values obtained by ID-ICP-MS and ICP-MS/MS. The proposed simple, rapid and practical analytical method for the determination of Ag mass fractions improves our understanding of the behaviour of silver in cosmochemistry and geochemistry studies.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"555-567"},"PeriodicalIF":3.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potassium Isotope Ratios (δ41K) of Eighteen Chinese Rock Reference Materials","authors":"Wenjun Li,&nbsp;Bingyu Gao,&nbsp;Qiqi Pan,&nbsp;Bai Yang,&nbsp;Jing Wang,&nbsp;Benxun Su","doi":"10.1111/ggr.12613","DOIUrl":"https://doi.org/10.1111/ggr.12613","url":null,"abstract":"<p>Potassium isotope ratios (<i>δ</i>⁴¹K) were determined for eighteen Chinese geological reference materials (RMs, GSR series) encompassing igneous, metamorphic and sedimentary rocks. K₂O mass fractions (<i>w</i>) ranged between 0.15 and 7.5% in these RMs. Measurements were conducted using a collision cell MC-ICP-MS with sample-standard bracketing technique. The intermediate precision of K isotopic determination, based on measurement results collected over 2.5 years, was 0.04‰ (2<i>s</i>, <i>n</i> = 69) for in-house GSB K solution and 0.05‰ (2<i>s</i>, <i>n</i> = 63) for basaltic RM BCR-2. The accuracy of our data was assessed by comparison with previously published data and/or utilising two or three different measurement procedures. The high-precision <i>δ</i>⁴¹K values for these eighteen RMs span a wide range from -1.15‰ (GBW07122, GSR 15, amphibolite) to 0.28‰ (GBW07120, GSR 13, limestone), and data for six RM are presented for the first time, making them valuable references for quality assurance and inter-laboratory comparisons.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"665-674"},"PeriodicalIF":3.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using Peak Geometry and Shifts in the X-Ray Spectrum of Carbon from Electron Probe Microanalysis to Determine Thermal Maturity of Organic Matter","authors":"Haolin Zhou,&nbsp;Gelu Costin,&nbsp;Justin E. Birdwell,&nbsp;Paul C. Hackley,&nbsp;Daniel Minisini,&nbsp;Tanguy Terlier,&nbsp;Mark A. Torres","doi":"10.1111/ggr.12611","DOIUrl":"https://doi.org/10.1111/ggr.12611","url":null,"abstract":"<p>During the burial of mudstones, the associated organic matter undergoes gradual thermal maturation, a key process that can influence the reactivity of organic matter during catagenesis, the formation of hydrocarbon deposits and the chemical weathering of mudstones. Conventional methods for assessing the thermal maturity of organic matter often fail to reflect the geochemical heterogeneity between individual organic phases in mudstone samples. Here, we report an alternative, non-destructive, surficial and micro-scale (analytical spot size of ~ 300 nm with about 4 μm diffusion depth for micrometre-size organic grains) method to evaluate the thermal maturity of organic matter in mudstones using the carbon <i>K</i>α X-ray spectrum measured by field emission-electron probe microanalyser (FE-EPMA). Using this method, we observed correlations between parameter values derived from FE-EPMA spectra, including the peak position, the peak area and the intra-sample heterogeneity of these measurements, and independently measured vitrinite/solid bitumen reflectance for a suite of mudstones, representing different age, geological context and burial depth. With the increased values in peak area and position, we identified an increase in the carbon mass fraction of organic matter and the mean nominal oxidation state of carbon approaching zero. These trends, which are consistent with aromatisation and graphitisation, provide the rationale for using FE-EPMA to estimate the thermal maturity of organic matter. To explore some of these trends in more detail, we employed time-of-flight secondary ionisation mass spectrometry, X-ray photoelectron spectroscopy and optical reflectance measurements on a subset of samples.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"591-605"},"PeriodicalIF":3.4,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Compositional Matrix Effects on Oxygen Isotope Measurements in Silicate Minerals and Glasses Using SIMS","authors":"Elena Dubinina,&nbsp;Alexander Borisov,&nbsp;Andrey Gurenko,&nbsp;S.A. Kossova,&nbsp;A.S. Avdeenko","doi":"10.1111/ggr.12612","DOIUrl":"https://doi.org/10.1111/ggr.12612","url":null,"abstract":"<p>Instrumental mass fractionation (IMF) accompanying oxygen isotope measurement by SIMS was studied for seventeen experimental alkali-rich (0–10 mole % of both K₂O and Na₂O) glasses along with a set of reference material glasses and minerals (quartz and olivine). Analyses were undertaken in two measurement sessions using a CAMECA IMS 1270-E7 ion microprobe operated under identical instrumental conditions. All employed experimental glasses and reference materials were re-analysed by laser fluorination gas source-mass spectrometry (LF GS-MS) to estimate their IMF values. The obtained IMF values, which ranged from -2.31 to +5.14‰, were combined with the IMF data for alkaline free glasses to estimate the compositional matrix effect for all major rock-forming oxides. Using this joint data set (including forty-four experimental glasses) a number of linear multiple variable regression models describing the link between IMF and major element chemical composition were established. To generalise the established models for the matrix effect (ME) correction we also evaluated an approach of routine measurement of chemically pure quartz with a known ¹⁸O/¹⁶O ratio along with the other glass reference materials and use it as the “zero” point for multi-component regression fit. Our choice was justified by the fact that the ME in quartz has to be strictly constant. The last represents an advantage of using quartz instead of olivine or any other reference materials for normalisation. Finally, we tested our best multi-component regression model (standard error as low as 0.4‰) established for silicate glasses, being presumably crystallographic-amorphous substances, in application to different structural groups of minerals such as olivine, clinopyroxene, garnet, feldspars and quartz. The difference between the measured ME values and the model-predicted varied systematically, and the magnitude of the observed deviations increased proportionally with increasing magnitude of the measured ME, pointing towards the role of crystallographic structure in producing a compositionally related matrix effect.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"629-644"},"PeriodicalIF":3.4,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First Determination of δ53CrSRM 979 in Sixteen Geological Reference Materials Using Double Spike Thermal Ionisation Mass Spectrometry after a Two-Column Matrix Separation","authors":"Yuqiu Wei,&nbsp;Lian Zhou,&nbsp;Anping Hu,&nbsp;Jie Cheng,&nbsp;Qiankun Hu,&nbsp;Anjiang Shen,&nbsp;Yating Hu,&nbsp;Lanping Feng","doi":"10.1111/ggr.12610","DOIUrl":"https://doi.org/10.1111/ggr.12610","url":null,"abstract":"<p>We report for the first time δ⁵³Cr_{SRM 979} values in sixteen geological reference materials (RMs) with varied lithological characteristics. The measured values range from -0.24‰ ± 0.05‰ (2<i>s</i>) to -0.08‰ ± 0.02‰ (2<i>s</i>) for igneous rocks, from -0.18 ± 0.04‰ (2<i>s</i>) to 0.08 ± 0.03‰ (2<i>s</i>) for sedimentary rocks and between -0.21‰ ± 0.04‰ (2<i>s</i>) and -0.10‰ ± 0.04‰ (2<i>s</i>) for metamorphic rocks, indicating significant isotopic fractionation across these RMs. Measurements were performed using thermal ionisation mass spectrometry with a ⁵⁰Cr-⁵⁴Cr double-spike technique following a two-column matrix separation. To validate our measurement procedure, we applied it to eighteen additional well-characterised RMs. Our results are in agreement with previously reported values, with precision typically below 0.05‰ (2<i>s</i>). This comprehensive data set provides a valuable reference for quality assurance schemes and inter-laboratory comparisons in Cr isotopic studies.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"537-553"},"PeriodicalIF":3.4,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}