Geostandards and Geoanalytical Research最新文献

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IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2025-03-27 DOI: 10.1111/ggr.12563

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GGR Handbook of Rock and Mineral Analysis Chapter 6 (Part 2) Principles and Practice of X-Ray Fluorescence Spectrometry – 2: Wavelength Dispersive and Energy Dispersive Instrumentation

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2025-02-19 DOI: 10.1111/ggr.12597

Kenneth E. Turner, Elizabeth Webber

{"title":"GGR Handbook of Rock and Mineral Analysis Chapter 6 (Part 2) Principles and Practice of X-Ray Fluorescence Spectrometry – 2: Wavelength Dispersive and Energy Dispersive Instrumentation","authors":"Kenneth E. Turner, Elizabeth Webber","doi":"10.1111/ggr.12597","DOIUrl":"https://doi.org/10.1111/ggr.12597","url":null,"abstract":"This chapter (Principles and Practice of X-Ray Fluorescence Spectrometry – 2: Wavelength Dispersive and Energy Dispersive Instrumentation) 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 6, Part 2 (from Section 2 of the handbook devoted to techniques for the determination of major and trace elements) deals with XRF wavelength dispersive and energy dispersive spectrometry. Dealing first with WD-XRF, Part 2 discusses its instrumentation, spectrum analysis and routine operating conditions. The following sections on ED-XRF discuss its detectors and their characteristics, the associated (pulse-processing) electronics, and X-ray interaction with these detectors. Consideration is then given to procedures for ED-XRF spectra analysis, as well as its analysis of silicate rock and mineral materials under routine operating conditions. Further sections cover total reflection XRF (TRXRF) and field portable (PXRF) instrumentation, and statistical procedures relevant to XRF analysis. The chapter also includes a comparison of the WD and ED spectrometer types and of their analytical performance, with emphasis on silicate rock analysis.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 1","pages":"51-130"},"PeriodicalIF":2.7,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707661","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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Obituary Dr. Klaus Peter Jochum

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2025-02-17 DOI: 10.1111/ggr.12602

Thomas C. Meisel, Dorrit Jacob, Ulrike Weis, Regina Mertz-Kraus, Jacinta Enzweiler, Anastassia Borisova, Edward A. Williams

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GGR Handbook of Rock and Mineral Analysis Chapter 2 (Part 1) Analysis of Geological Materials – 1: Sample Preparation Methods

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2025-02-06 DOI: 10.1111/ggr.12555

Philip Robinson

{"title":"GGR Handbook of Rock and Mineral Analysis Chapter 2 (Part 1) Analysis of Geological Materials – 1: Sample Preparation Methods","authors":"Philip Robinson","doi":"10.1111/ggr.12555","DOIUrl":"https://doi.org/10.1111/ggr.12555","url":null,"abstract":"This chapter (Analysis of Geological Materials – 1: Sample Preparation Methods) 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).In Chapter 2, Part 1 (from Section 1 of the handbook dealing with fundamentals of measurement and instrument design) rock sample preparation techniques will be considered in detail (Parts 2 and 3 deal with pre-concentration and separation procedures, and the determination of specific element groups, respectively). Despite some techniques undertaking measurements on solid samples, the need for dissolution remains the preferred method for many modern instrumental measurement principles such as ICP-MS, ICP-AES and TIMS. A solution provides homogeneity and can further be used for separation and pre-concentration, both of which are important for the measurement of low mass fractions in isotope geochemistry. Part 1 first takes an historical view of developments in this field, followed by state-of-the-art assessments of dissolution procedures based on acid attack, decomposition by molten salt fusion, the decomposition of resistant minerals, flux-free fusion, and the use of pressed powder pellets.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 1","pages":"9-50"},"PeriodicalIF":2.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12555","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707461","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}

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IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-12-04 DOI: 10.1111/ggr.12510

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Rubidium Isotope Measurements of Low-Rb Geological Materials by MC-ICP-MS

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-12-03 DOI: 10.1111/ggr.12593

Ya-Qi Zhang, Wei Wei, Zhuoying Zhang, Xia Hu, Hui-Min Yu, Fang Huang

{"title":"Rubidium Isotope Measurements of Low-Rb Geological Materials by MC-ICP-MS","authors":"Ya-Qi Zhang, Wei Wei, Zhuoying Zhang, Xia Hu, Hui-Min Yu, Fang Huang","doi":"10.1111/ggr.12593","DOIUrl":"https://doi.org/10.1111/ggr.12593","url":null,"abstract":"The rubidium (Rb) isotope system has the potential to trace planetary evolution, magmatic-fluid interaction and chemical weathering. These applications are based on Rb isotope measurement results with precisions fit for purpose, but measurements of low-Rb geological materials are challenging due to large sample consumption and overload of ion-exchange resin. Here we developed a measurement procedure for Rb isotope data (δ87RbSRM984) of low-Rb geological materials using MC-ICP-MS. Using an Aridus III desolvator and Ni standard sampler + Ni X skimmer cone combination, the Rb loading amount was reduced significantly to 20 ng. A comparison between two methods for instrumental mass-bias correction, the sample-standard bracketing and combined sample-standard bracketing and internal (Zr) normalisation (C-SSBIN), shows that C-SSBIN could produce Rb isotope data with better intermediate measurement precisions but strictly restricted to optimal Zr/Rb ratio. The robustness of this method was demonstrated by monitoring δ87RbSRM984 data of two in-house Rb isotope standards, replicates, some reference materials with δ87RbSRM984 values previously reported, and element-doped and matrix-spiked synthetic solutions. Based on repeated measurements of Rb isotope standards and reference materials, the long-term (over one year) intermediate precision was better than 0.05‰ (2s, standard deviations). We additionally recommend thirteen reliable reference materials for future Rb isotope ratio measurements.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 1","pages":"259-270"},"PeriodicalIF":2.7,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707247","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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Geostandards and Geoanalytical Research 土工标准及土工分析研究

IF 2.7 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-12-01 DOI: 10.1111/ggr.12595

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Baddeleyite SK10-3: A Natural Reference Material for Microbeam U-Pb Geochronology and Hf Isotopic Measurements

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}

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High-Precision Sn Isotopic Measurement in Geological Materials by Double-Spike MC-ICP-MS

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

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Characterisation of Five Natural Magnetite Reference Materials for In Situ Iron Isotope Measurement with Application to Magmatic Ni-Cu Sulfide Mineralisation

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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