Geostandards and Geoanalytical Research最新文献_第2页

Origin and Significance of Age Variability in the Glauconite Reference Material GL-O: Implications for In Situ Rb-Sr Geochronology

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-11-07 DOI: 10.1111/ggr.12588

Stefan C. Löhr, Elnaz Khazaie, Juraj Farkas, Andre Baldermann, Sarah Gilbert, Roland Maas, Darwinaji Subarkah, Morgan L. Blades, Alan S. Collins

{"title":"Origin and Significance of Age Variability in the Glauconite Reference Material GL-O: Implications for In Situ Rb-Sr Geochronology","authors":"Stefan C. Löhr, Elnaz Khazaie, Juraj Farkas, Andre Baldermann, Sarah Gilbert, Roland Maas, Darwinaji Subarkah, Morgan L. Blades, Alan S. Collins","doi":"10.1111/ggr.12588","DOIUrl":"https://doi.org/10.1111/ggr.12588","url":null,"abstract":"Stratigraphic ages from conventional glauconite geochronology are commonly younger than those obtained via high temperature chronometers. The widely used glauconite reference material GL-O, for example, has a K-Ar age (95.03 ± 1.11 Ma) ~ 5 Ma younger than its expected stratigraphic age. To identify the influences on glauconite ages and assess the suitability of GL-O as a reference material for in situ Rb-Sr geochronology, we separated GL-O grains based on colour and morphology. Each fraction was characterised petrographically and compositionally before in situ Rb-Sr dating. Separate aliquots were dated via conventional isotope dilution (ID) Rb-Sr geochronology. We find a ~ 10 Ma spread in the in situ Rb-Sr ages of GL-O fractions, where more rapid maturation and isotopic closure of darker grains yields ages closer to the depositional age, whereas smaller, more porous light green grains show evidence for delayed maturation leading to continued Rb uptake during burial as well as Sr isotope exchange with connate fluids. Discrepancies between ID and in situ Rb-Sr ages are explained by (i) core-rim age zonation, (ii) the presence of alteration resistant, Sr-rich apatite inclusions, (iii) differences in laser-induced fractionation. We recommend additional purification steps before use of GL-O as reference material for in situ Rb-Sr geochronology.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 1","pages":"197-216"},"PeriodicalIF":2.7,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707389","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}

引用次数: 0

GGR Handbook of Rock and Mineral Analysis Chapter 5 The Inductively Coupled Plasma GGR岩石和矿物分析手册第5章电感耦合等离子体

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-11-05 DOI: 10.1111/ggr.12558

Kathryn L. Linge

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GGR Handbook of Rock and Mineral Analysis [Chapter 13] Laser-Induced Breakdown Spectroscopy (LIBS) GGR岩石和矿物分析手册[第13章]激光诱导击穿光谱（LIBS）

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-11-05 DOI: 10.1111/ggr.12560

Russell S. Harmon, Giorgio S. Senesi

{"title":"GGR Handbook of Rock and Mineral Analysis [Chapter 13] Laser-Induced Breakdown Spectroscopy (LIBS)","authors":"Russell S. Harmon, Giorgio S. Senesi","doi":"10.1111/ggr.12560","DOIUrl":"https://doi.org/10.1111/ggr.12560","url":null,"abstract":"This chapter (Laser-Induced Breakdown Spectroscopy (LIBS)) is a contribution to the Geostandards and Geoanalytical Research Handbook of Rock and Mineral Analysis – an online textbook that is a fully revised and updated edition of A Handbook of Silicate Rock Analysis (P. J. Potts, 1987, Blackie, Glasgow).Chapter 13 (from Section 3 of the handbook dealing with microbeam techniques) provides first a history of the development of laser-induced breakdown spectroscopy, and of the LIBS process, followed by an examination of the fundamental principles of LIBS and its instrumentation. Discussion is then provided on the preparation of sample material, LIBS matrix effects and signal processing. Different modes of compositional analysis that can be tackled by LIBS are described, including quantitative measurement (covering isotope measurements), compositional mapping, depth profiling and the determination of physical properties of geological materials. The recent tandem coupling of LIBS with laser ablation ICP-MS instrumentation is explored. Finally, a suite of examples of LIBS analyses of silicate rocks and minerals is provided, demonstrating the utility of this measurement principle in rapid compositional assessment, detailed petrological studies and microgeochemical mapping.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 4","pages":"763-792"},"PeriodicalIF":2.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860230","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}

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GGR Handbook of Rock and Mineral Analysis Chapter 1 (Part 2) Sampling as Part of the Measurement Process GGR岩石和矿物分析手册第1章（第2部分）取样作为测量过程的一部分

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-11-04 DOI: 10.1111/ggr.12586

Michael H. Ramsey

{"title":"GGR Handbook of Rock and Mineral Analysis Chapter 1 (Part 2) Sampling as Part of the Measurement Process","authors":"Michael H. Ramsey","doi":"10.1111/ggr.12586","DOIUrl":"https://doi.org/10.1111/ggr.12586","url":null,"abstract":"This chapter (Sampling as Part of the Measurement Process) is a contribution to the Geostandards and Geoanalytical Research Handbook of Rock and Mineral Analysis – an online textbook that is a fully revised and updated edition of A Handbook of Silicate Rock Analysis (P. J. Potts, 1987, Blackie, Glasgow).Chapter 1 (Part 2) forms part of Section 1 of the handbook dealing with fundamentals of measurement and instrument design. The geochemical measurement process is considered to begin when the primary sample is taken from the sampling target, rather than when that sample arrives at the laboratory. This integration of sampling within the measurement procedure enables both sampling and chemical analysis to be optimised in order to achieve a measurement procedure that is fit for its intended geochemical purpose. The key metric in judging this fitness for purpose, and hence validating a measurement procedure, is the uncertainty of each measurement value. This measurement uncertainty is explained, together with methods to estimate and express it in a way that includes the contribution from sampling, with a worked example. The resultant more realistic estimates of measurement uncertainty are shown to improve the reliability of the geochemical interpretation of measurement values.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 4","pages":"719-736"},"PeriodicalIF":2.7,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12586","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859970","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}

引用次数: 0

Characterisation of δ142Ce/140Ce Isotope Ratios in Geological Reference Materials using an SSB+Sm Doping and MC-ICP-MS Method

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-10-30 DOI: 10.1111/ggr.12589

Jiaojiao Wu, Yajun An, Xin Li, Fang Liu, Jianbing Xu, Mingxing Ling, Zhaofeng Zhang

{"title":"Characterisation of δ142Ce/140Ce Isotope Ratios in Geological Reference Materials using an SSB+Sm Doping and MC-ICP-MS Method","authors":"Jiaojiao Wu, Yajun An, Xin Li, Fang Liu, Jianbing Xu, Mingxing Ling, Zhaofeng Zhang","doi":"10.1111/ggr.12589","DOIUrl":"https://doi.org/10.1111/ggr.12589","url":null,"abstract":"We report the δ142/140Ce values for thirty-three widely available geological reference materials (RMs), including igneous rocks, metamorphic rocks, sediments and soils. The Ce isotope ratios of twenty-two Chinese RMs are reported for the first time. After chemical purification using TODGA resin (50–100 μm, Eichrom, USA), Ce isotope measurements of these RMs were conducted by multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS) with a combined standard-sample bracketing (SSB) and Sm-doping technique. The data quality of the Ce isotope results was assessed by repeated measurement of pure Ce reference solutions (NIST SRM 3110, JMC304, CDUT-Ce) and well-characterised geological RMs (BHVO-2, BCR-2, Nod-A-1, Nod-P-1, etc.). Our results are in excellent agreement with previously reported values within intermediate measurement precision (±0.04‰, 2s). The igneous rock and soil RMs showed limited variations in δ142/140Ce values, which ranged from -0.036 ± 0.018‰ to 0.062 ± 0.046‰ and -0.015 ± 0.015‰ to 0.029 ± 0.009‰, respectively. The river/marine sediments and Mn nodules displayed variable Ce isotope ratios ranging from -0.005 ± 0.018‰ to 0.141 ± 0.023‰, suggesting detectable Ce isotopic fractionation during low-temperature processes.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 1","pages":"233-244"},"PeriodicalIF":2.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707582","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}

引用次数: 0

Bibliometric Analysis of Reference Materials and Certified Reference Materials Applied to Geochemistry

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-10-29 DOI: 10.1111/ggr.12587

Alexandre R. Cardoso, Jaques S. Schmidt, Anderson J. Maraschin, Débora C. de Andrade, Filipe de M. Albano, Eduardo M. Bernardes, Gabriel Rübensam, Gustavo B. Barp, Naira P. Rodrigues, Yasmin F. de Oliveira, Joselito C. Vazquez, Felipe D. Vecchia

{"title":"Bibliometric Analysis of Reference Materials and Certified Reference Materials Applied to Geochemistry","authors":"Alexandre R. Cardoso, Jaques S. Schmidt, Anderson J. Maraschin, Débora C. de Andrade, Filipe de M. Albano, Eduardo M. Bernardes, Gabriel Rübensam, Gustavo B. Barp, Naira P. Rodrigues, Yasmin F. de Oliveira, Joselito C. Vazquez, Felipe D. Vecchia","doi":"10.1111/ggr.12587","DOIUrl":"https://doi.org/10.1111/ggr.12587","url":null,"abstract":"The use of reference materials (RMs) and certified reference materials (CRMs) is essential to guarantee the reliability of measurement procedures - a major factor motivating the efforts of the geoanalytical community. This work quantifies trends and patterns in the scientific literature concerning RMs and CRMs in geochemistry for specific timespans, with the aim of evaluating historical developments, research fields, geographic shifts of research centres, and current trends. The Scopus database was surveyed for peer-reviewed full-texts (14,201 documents), which were subsequently exploited for statistical description, bibliometric mapping and cluster analysis. Mineral exploration and trace element geochemistry stimulated early research, whereas environmental subjects have grown in importance mainly since the year 2000. International standardisation was coincident with an increase of publications covering CRMs and geochemistry, and is thought to reflect the impact of ISO guidelines in this scientific activity. Other factors include investments in research facilities, creation of specialised geoanalytical journals and organisation of international meetings. The analysis shows that RMs are typically used for petrogenetic research topics, whereas CRMs are equally important for environmental sciences, chemistry and geosciences. Environmental sciences are mostly concerned with anthropogenic contamination of ecosystems by heavy metals, whereas geological interest is mainly driven by isotope geochemistry. Scientific frontiers in geoanalytical research comprise microanalytical methodologies, unconventional isotopes, rare earth elements and environmental monitoring. New trends in CRM applications also include biogeochemistry and radionuclides.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 1","pages":"161-177"},"PeriodicalIF":2.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707651","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}

引用次数: 0

GGR Handbook of Rock and Mineral Analysis Chapter 6 (Part 1) Principles and Practice of X-Ray Fluorescence Spectrometry –1: Fundamentals of XRF and Matrix Corrections GGR 岩石和矿物分析手册第 6 章（第 1 部分） X 射线荧光光谱法的原理与实践-1：X 射线荧光光谱法和基质校正的基本原理

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-10-07 DOI: 10.1111/ggr.12559

Kenneth E. Turner, Elizabeth Webber

{"title":"GGR Handbook of Rock and Mineral Analysis Chapter 6 (Part 1) Principles and Practice of X-Ray Fluorescence Spectrometry –1: Fundamentals of XRF and Matrix Corrections","authors":"Kenneth E. Turner, Elizabeth Webber","doi":"10.1111/ggr.12559","DOIUrl":"https://doi.org/10.1111/ggr.12559","url":null,"abstract":"This chapter (Principles and Practice of X-Ray Fluorescence Spectrometry – 1: Fundamentals of XRF and Matrix Corrections) is a contribution to the Geostandards and Geoanalytical Research Handbook of Rock and Mineral Analysis – an online textbook that is a fully revised and updated edition of the Handbook of Silicate Rock Analysis (P. J. Potts, 1987, Blackie, Glasgow).Chapter 6, Part 1 (from Section 2 of the handbook dealing with techniques for the determination of major and trace elements) considers the fundamentals of XRF spectrometry and matrix corrections in detail. Part 2 deals with wavelength dispersive and energy dispersive instrumentation. Following an introduction dealing with the analytical characteristics of XRF spectrometry, Part 1 continues with a detailed consideration of the origin and excitation of X-ray spectra. Sub-chapters that tackle the interaction of X-rays with matter and the matrix effect in geological materials follow this. Part 1 is concluded with a mathematical treatment of the correction of absorption-enhancement effects.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 3","pages":"505-541"},"PeriodicalIF":2.7,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429337","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}

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GGR Handbook of Rock and Mineral Analysis Chapter 1 (Part 1) Geoanalytical Metrology GGR 岩石和矿物分析手册第 1 章（第 1 部分）地质分析计量学

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-10-07 DOI: 10.1111/ggr.12571

Kathryn L. Linge, Philip J. Potts

{"title":"GGR Handbook of Rock and Mineral Analysis Chapter 1 (Part 1) Geoanalytical Metrology","authors":"Kathryn L. Linge, Philip J. Potts","doi":"10.1111/ggr.12571","DOIUrl":"https://doi.org/10.1111/ggr.12571","url":null,"abstract":"This chapter (Geoanalytical Metrology) is a contribution to the Geostandards and Geoanalytical Research Handbook of Rock and Mineral Analysis – an online textbook that is a fully revised and updated edition of Handbook of Silicate Rock Analysis, which was written by Philip J. Potts and published in 1987 by Blackie and Son (Glasgow). This second edition comprises chapters, written by prominent research scientists, designed to provide comprehensive overviews of the relevant techniques for the elemental characterisation of rocks and minerals. Chapters are designed to allow new practitioners to the field (including research students) to attain a comprehensive understanding of the theory, practice and capabilities of each technique, as well as being of benefit to established research geoanalysts. In addition to the content, chapter titles have been revised where appropriate to reflect progress in this field.Chapter 1, Part 1 (from Section 1 of the handbook dealing with fundamentals of measurement and instrument design) first sets out the overarching conventions that operate in analytical chemistry, including a description of the international organisations and systems that regulate the standards governing the discipline. This is followed by coverage of the statistical basis on which geoanalytical data sets are treated, analysed and interpreted, which summarises most of the relevant tests and terminology employed in this field. The methods by which the calibration of measured signals from instrumental techniques is tackled, followed by method validation, which covers aspects including measurement uncertainty, bias, precision and trueness. Sections detailing metrological traceability and quality management conclude this chapter.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 3","pages":"457-503"},"PeriodicalIF":2.7,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429336","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}

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GGR Handbook of Rock and Mineral Analysis Chapter 7 Quadrupole Inductively Coupled Plasma-Mass Spectrometry GGR 岩石和矿物分析手册》第 7 章四极电感耦合等离子体质谱法

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-10-07 DOI: 10.1111/ggr.12556

Kathryn L. Linge

引用次数: 0

IAG Membership Information 国际咨询小组成员信息

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-10-07 DOI: 10.1111/ggr.12508

引用次数: 0