Geostandards and Geoanalytical Research最新文献_第9页

Baddeleyite SK10-3: A Natural Reference Material for Microbeam U-Pb Geochronology and Hf Isotopic Measurements Baddeleyite SK10-3：微束U-Pb年代学和Hf同位素测量的天然参考物质

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-11-24 DOI: 10.1111/ggr.12591

Ranran Chen, Shitou Wu, Hao Wang, Martin Senger, André Navin Paul, Paul J. Sylvester, Yueheng Yang, Jinhui Yang, Fuyuan Wu

{"title":"Baddeleyite SK10-3: A Natural Reference Material for Microbeam U-Pb Geochronology and Hf Isotopic Measurements","authors":"Ranran Chen, Shitou Wu, Hao Wang, Martin Senger, André Navin Paul, Paul J. Sylvester, Yueheng Yang, Jinhui Yang, Fuyuan Wu","doi":"10.1111/ggr.12591","DOIUrl":"https://doi.org/10.1111/ggr.12591","url":null,"abstract":"Baddeleyite is an important U-Pb geochronometer and Hf isotope tracer that commonly occurs as an accessory phase in silica-undersaturated igneous rocks of terrestrial and extra-terrestrial origin. Currently, very few well-characterised, large sized reference materials are available for baddeleyite U-Pb geochronology and Hf isotope measurement. In this study, we document a baddeleyite reference material (SK10-3) of Cenozoic age. SK10-3 is inclusion-free and does not contain secondary alteration minerals. The baddeleyite has uniform U-Pb ages and Hf isotope ratios, within analytical uncertainty, as demonstrated by multiple LA-ICP-MS spot analyses (weighted mean 206Pb/238U age: 31.59 ± 0.11 Ma, MSWD = 0.7, n = 197) and LA-MC-ICP-MS analyses (arithmetic mean 176Hf/177Hf ratio: 0.282741 ± 59, 2s, n = 188). Seven ID-TIMS analyses yielded a weighted mean 206Pb/238U age of 31.592 ± 0.020/0.022/0.040 Ma (n = 7, 2s, MSWD = 2.2). Nine aliquots of MC-ICP-MS analyses yielded an arithmetic mean 176Hf/177Hf ratio of 0.282742 ± 8 (2s). We further demonstrate that the method of shallow-pit (~ 2 μm depth) ablation substantially improves the precision and accuracy of baddeleyite U-Pb ages. SK10-3 has a relatively high 176Yb/177Hf ratio (~ 0.007) compared with most other baddeleyites, allowing the precise measurement of βYb and may be useful in generating the βYb-βHf relationship during LA-MC-ICP-MS Hf isotope measurement. SK10-3 may be a useful addition to previously distributed baddeleyite reference materials for microbeam-based U-Pb geochronology and Hf isotope measurements.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 1","pages":"179-195"},"PeriodicalIF":2.7,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707255","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

High-Precision Sn Isotopic Measurement in Geological Materials by Double-Spike MC-ICP-MS 用双尖峰MC-ICP-MS高精度测量地质物质中的锡同位素

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-11-19 DOI: 10.1111/ggr.12590

Wenrui Song, Chuanwei Zhu, Hanjie Wen, Yuxu Zhang, Zerui Liu, Meifu Zhou

引用次数: 0

Characterisation of Five Natural Magnetite Reference Materials for In Situ Iron Isotope Measurement with Application to Magmatic Ni-Cu Sulfide Mineralisation 五种天然磁铁矿原位铁同位素测量基准物质的表征及其在岩浆镍铜硫化矿化中的应用

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-11-17 DOI: 10.1111/ggr.12592

Yantong Feng, Wen Zhang, Yawen Bao, Xianli Zeng, Hong Liu, Tao Luo, Zhaochu Hu, Mingjie Zhang, Yu Wang, Yan Yang, Shengjiang Liu

{"title":"Characterisation of Five Natural Magnetite Reference Materials for In Situ Iron Isotope Measurement with Application to Magmatic Ni-Cu Sulfide Mineralisation","authors":"Yantong Feng, Wen Zhang, Yawen Bao, Xianli Zeng, Hong Liu, Tao Luo, Zhaochu Hu, Mingjie Zhang, Yu Wang, Yan Yang, Shengjiang Liu","doi":"10.1111/ggr.12592","DOIUrl":"https://doi.org/10.1111/ggr.12592","url":null,"abstract":"Iron isotope ratios in magnetite have been widely used to reveal critical geological and biological processes. Laser ablation multi-collector inductively coupled plasma-mass spectrometry (LA-MC-ICP-MS) is ideally suited for measurement of Fe isotope ratios, however the lack of suitable reference materials poses a significant challenge for in situ Fe isotopic measurements in magnetites. In this study, five high-quality natural magnetite crystals were characterised for Fe isotope ratios using solution nebulisation (SN)-MC-ICP-MS and LA-MC-ICP-MS. The effects of LA-MC-ICP-MS analytical conditions were investigated to obtain precise and accurate Fe isotope ratios. The yielded intermediate measurement precisions for the δ56Fe values in the five investigated magnetites were ± 0.05–0.06‰ (2s) using SN-MC-ICP-MS and ± 0.08–0.14‰ (2s) using LA-MC-ICP-MS. Magnetites with homogeneous Fe isotopic compositions in hand-specimen measurements and microanalysis can serve as potential reference materials for in situ Fe isotopic measurement. Furthermore, the Fe isotope ratios in the magnetites from the Jinchuan Ni-Cu-PGE sulfide deposit were measured using LA-MC-ICP-MS with natural magnetite as the bracketing calibrator. The increase in the Fe isotopic composition with magmatic sulfide evolution was primarily dominated by oxygen fugacity (fO2) and hydrothermal fluids. This finding implies that the Fe isotopic composition of magnetite can serve as a potential geochemical indicator of magmatic Ni-Cu sulfide mineralisation.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 1","pages":"217-232"},"PeriodicalIF":2.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707195","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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Origin and Significance of Age Variability in the Glauconite Reference Material GL-O: Implications for In Situ Rb-Sr Geochronology 海绿石标准物质GL-O年龄变异的来源及其意义：原位Rb-Sr年代学意义

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}

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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 用SSB+Sm掺杂和MC-ICP-MS方法表征地质标准物质中δ142Ce/140Ce同位素比值

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 应用于地球化学的标准物质和认证标准物质的文献计量学分析

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}

引用次数: 0