Geostandards and Geoanalytical Research最新文献_第5页

Molybdenite Reference Materials for In Situ LA-ICP-MS/MS Re-Os Geochronology 用于原位 LA-ICP-MS/MS Re-Os 地质年代的辉钼矿参考材料

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-04-02 DOI: 10.1111/ggr.12550

Renée Tamblyn, Sarah Gilbert, Stijn Glorie, Carl Spandler, Alexander Simpson, Martin Hand, Derrick Hasterok, Bryant Ware, Svetlana Tessalina

{"title":"Molybdenite Reference Materials for In Situ LA-ICP-MS/MS Re-Os Geochronology","authors":"Renée Tamblyn, Sarah Gilbert, Stijn Glorie, Carl Spandler, Alexander Simpson, Martin Hand, Derrick Hasterok, Bryant Ware, Svetlana Tessalina","doi":"10.1111/ggr.12550","DOIUrl":"10.1111/ggr.12550","url":null,"abstract":"Re-Os isotope-dilution geochronology has been widely used to date the timing of molybdenite, pyrite and chalcopyrite formation across a variety of geological settings. However, in situ methods have been impeded by the isobaric interference of 187Re on 187Os. In situ Re-Os geochronology using LA-ICP-MS/MS has been shown to be a useful technique to chemically separate Os from Re, as Os reacts with CH4 to create higher-mass reaction products, which can then be measured with minimised interference of 187Re. However, application of the method requires matrix-matched primary reference materials, e.g., age-homogenous molybdenite amenable to laser ablation. Here, we characterise and present two new molybdenite mineral reference materials for in situ Re-Os geochronology by LA-ICP-MS/MS, verified by ID-TIMS Re-Os measurements. We also present case studies from molybdenite samples with varying Re mass fractions and Re-Os age mapping. The method provides accurate and precise age data, with excellent precision for high Re samples. The benefits of the LA-ICP-MS/MS approach include: (1) simple sample preparation, (2) rapid data acquisition, (3) targeting of specific textural domains including growth zones and (4) the ability to simultaneously collect trace elements used to link the timing and conditions of ore-formation.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 2","pages":"393-410"},"PeriodicalIF":3.8,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12550","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140586249","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

X-Ray Fluorescence Determination of FeII/Fetotal Ratios in Sediments and Soils X 射线荧光测定沉积物和土壤中的 FeII/总比率

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-03-25 DOI: 10.1111/ggr.12551

Alexander Pleßow, Marcel Mehne, Sven Kureti

{"title":"X-Ray Fluorescence Determination of FeII/Fetotal Ratios in Sediments and Soils","authors":"Alexander Pleßow, Marcel Mehne, Sven Kureti","doi":"10.1111/ggr.12551","DOIUrl":"10.1111/ggr.12551","url":null,"abstract":"The two most common oxidation states of iron can be determined by wavelength-dispersive X-ray fluorescence spectrometry relatively fast with an accuracy comparable to that of alternative methods. Main advantages for the analysis of sediments and soils are that organic matter does not interfere and solid samples can be analysed directly with minimal preparation effort. The limited availability of appropriate reference materials with certified data on their ferrous iron content turned out to be the major obstacle to implementing the method. For this reason and because no influence of the analysed geological materials on the intensity ratios of the closely adjacent Fe Kβ5 / Fe Kβ1,3 lines became evident, several rock types were selected in addition to sediments and soils to broaden and improve the calibration. Nevertheless, most reference data for calibration had to be determined by 57Fe Mössbauer spectroscopy. Plotting Fe Kβ5/Fe Kβ1,3 intensity ratios versus w FeO/w Fe2O3total ratios resulted in a correlation with R2 = 0.962 for the linear regression of all calibration data.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 2","pages":"433-444"},"PeriodicalIF":3.8,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140302093","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

Chromite Reference Materials and Matrix Effects in SIMS Oxygen Isotope Measurements 铬铁矿参考材料和 SIMS 氧同位素测量中的基质效应

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-03-15 DOI: 10.1111/ggr.12548

Qi-Qi Pan, Jing Wang, Yan Xiao, Bin Fu, Yang Bai, Ian S. Williams, Ben-Xun Su

引用次数: 0

SIMS Iron Isotope Measurements of the Balmat Pyrite Reference Material: A Non-Unique δ56Fe Signature 巴尔马特黄铁矿参考材料的 SIMS 铁同位素测量：非独特的 δ56Fe 特征

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-03-13 DOI: 10.1111/ggr.12549

Virgil Pasquier, Eric S. Rego, Juliette Dupeyron, Anne-Sophie Bouvier, Thomas Bovay, Martin Robyr, Johanna Marin-Carbonne

{"title":"SIMS Iron Isotope Measurements of the Balmat Pyrite Reference Material: A Non-Unique δ56Fe Signature","authors":"Virgil Pasquier, Eric S. Rego, Juliette Dupeyron, Anne-Sophie Bouvier, Thomas Bovay, Martin Robyr, Johanna Marin-Carbonne","doi":"10.1111/ggr.12549","DOIUrl":"10.1111/ggr.12549","url":null,"abstract":"In situ iron isotope ratios (δ56Fe) in sulfide measured by secondary ion mass spectrometry (SIMS) can provide valuable information on several of Earth's surface processes. SIMS relies on the use of a matrix-matched reference material to correct for instrumental mass fractionation. To date Balmat pyrite has been widely used as a reference material, on the assumption of its homogeneous δ56Fe composition. However, several studies have reported divergent bulk δ56Fe values, which may jeopardise its use. Here, we combined bulk solution MC-ICP-MS and in situ SIMS δ56Fe measurements on two Balmat batches: the Balmat-Original published in Whitehouse and Fedo (2007) and Balmat-UNIL. Despite similar compositions, this study demonstrates the existence of two isotopically distinct Balmat populations. With respect to Balmat-Original (δ56Fe = -0.39 ± 0.05‰, 2s), Balmat-UNIL is isotopically 'lighter' with a bulk solution MC-ICP-MS composition of -1.46 ± 0.024‰. Additionally, Balmat-UNIL has two subpopulations: the first is characterised by δ56Fe values of -1.46 ± 0.25‰, whereas the second agrees with the original Balmat batch. In each Balmat-UNIL subpopulation, the intra-grain and inter-grain variabilities are sufficient to use Balmat as a reference material for δ56Fe isotope measurements by SIMS. This study revealed at least two end-member compositions of Balmat pyrite and calls for a careful batch-specific determination of bulk δ56Fe.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 2","pages":"423-431"},"PeriodicalIF":3.8,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12549","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140129568","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

Precise Measurement of Magnesium Isotopes in Fe-Mg Minerals Using a Multi-collector SHRIMP Ion Microprobe 利用多收集器 SHRIMP 离子微探针精确测量铁镁矿物中的镁同位素

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-03-07 DOI: 10.1111/ggr.12547

Fernando Bea, Pilar Montero, Delia Ortega, José F. Molina, Aitor Cambeses, Leticia Barcos, Shui-Jiong Wang, Shan Ke

{"title":"Precise Measurement of Magnesium Isotopes in Fe-Mg Minerals Using a Multi-collector SHRIMP Ion Microprobe","authors":"Fernando Bea, Pilar Montero, Delia Ortega, José F. Molina, Aitor Cambeses, Leticia Barcos, Shui-Jiong Wang, Shan Ke","doi":"10.1111/ggr.12547","DOIUrl":"10.1111/ggr.12547","url":null,"abstract":"The distribution of Mg isotopes in minerals is becoming increasingly relevant in Earth science. Usually, they are determined by dissolving mineral concentrates and, after purifying Mg with ion exchange resins, analysing the resulting solutions by TIMS or, most often, MC-ICP-MS. When applied to individual minerals, these methods are slow and prone to contamination from impurities in the concentrates, inconveniences that may be avoided using spot analysis techniques such as LA-MC-ICP-MS or SIMS, albeit at the price of a large instrumental mass fractionation (IMF) and isobaric interferences, most prominent in the former. Here, we studied the potential of the multi-collector SHRIMP II ion microprobe for measuring Mg isotopes in Fe-Mg silicates and oxides. We found that, when corrected for the divergence of the Mg ion paths within the sample chamber caused by the Earth's magnetic field, the SHRIMP's IMF overwhelmingly depends on the mineral species, and the effects of variable chemical composition are negligible. We propose that the IMF is caused by the force constant difference, ∆F, between \"hard\" and \"soft\" bonds linking the ions of the studied element to the mineral lattice. Given that ∆F is a constant for each mineral species, we calculated IMF-correction factors for the most common Mg-bearing minerals. The thus-calculated correction factors permit the analysis in the same session, and with reasonable accuracy (within ~ 0.3‰ of the δ26Mg determined by SN-MC-ICP-MS analyses of concentrates), of samples from different mineral species, facilitating the application of Mg isotopes to terrestrial studies.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 2","pages":"331-343"},"PeriodicalIF":3.8,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12547","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140075207","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

Statistical Perspective on the Petrological Utility of Polyphase Groundmass Compositions Inferred via Defocused Beam Electron Probe Microanalysis 从统计角度看通过聚焦束电子探针显微分析法推断出的多相地层成分的岩石学用途

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-02-21 DOI: 10.1111/ggr.12546

Daniel A. Coulthard Jr, Yoshiyuki Iizuka, Georg F. Zellmer, Raimundo Brahm

{"title":"Statistical Perspective on the Petrological Utility of Polyphase Groundmass Compositions Inferred via Defocused Beam Electron Probe Microanalysis","authors":"Daniel A. Coulthard Jr, Yoshiyuki Iizuka, Georg F. Zellmer, Raimundo Brahm","doi":"10.1111/ggr.12546","DOIUrl":"10.1111/ggr.12546","url":null,"abstract":"Polyphase groundmasses (micro-scale minerals with or without glass) are generated from silicate liquids during the cooling of natural lavas often alongside larger minerals formed long before eruption. Many researchers have posited that compositions gleaned from the analysis of groundmasses closely approximate the compositions of the melts they were derived from, and these have been used frequently to model pre-eruptive magma conditions. However, it is difficult to confidently identify and sample these groundmasses once they are formed. Using a sample of lava that exhibits a wide degree of textural variation (ranging from holocrystalline to hypohyaline) we show that compositions of groundmasses sampled using defocused electron beams are significantly different from glass compositions in terms of mean composition and covariance. Despite this, several groundmass compositions qualify as ‘in equilibrium’ with matrix/rim olivine. When processed using available thermometers, however, modelled equilibrium temperatures are significantly higher than those produced using glass data, on average. Because of this, we prescribe caution in using polyphase groundmass data generated using defocused beam analysis even as a rudimentary approach.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 2","pages":"345-358"},"PeriodicalIF":3.8,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139946249","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

Development of a Matrix-Matched Barite Reference Material (NWU-Brt) for Calibration of In Situ S Isotope Measurements by Laser Ablation Multi-Collector Inductively Coupled Plasma-Mass Spectrometry 开发基质匹配重晶石标准物质（NWU-Brt），用于校准激光烧蚀多收集器电感耦合等离子体质谱法的原位 S 同位素测量结果

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-02-15 DOI: 10.1111/ggr.12544

Nan Lv, Zhian Bao, Xiaojuan Nie, Kaiyun Chen, Yan Zhang, Honglin Yuan

{"title":"Development of a Matrix-Matched Barite Reference Material (NWU-Brt) for Calibration of In Situ S Isotope Measurements by Laser Ablation Multi-Collector Inductively Coupled Plasma-Mass Spectrometry","authors":"Nan Lv, Zhian Bao, Xiaojuan Nie, Kaiyun Chen, Yan Zhang, Honglin Yuan","doi":"10.1111/ggr.12544","DOIUrl":"10.1111/ggr.12544","url":null,"abstract":"A new matrix-matched reference material (NWU-Brt) with sulfur isotope ratios resembling those of natural barites has been developed for in situ S isotope measurements by laser ablation multi-collector inductively coupled plasma-mass spectrometry (LA-MC-ICP-MS). A 100 g quantity of natural barite crystal was milled to ultra-fine particles and sintered to a solid block using a fast hot-pressing sintering technique (FHPS). We report δ34S ratios determined by isotope ratio mass spectrometry (IRMS), solution nebuliser multi-collector inductively coupled plasma-mass spectrometry (SN-MC-ICP-MS) and LA-MC-ICP-MS, involving up to six participating laboratories. The homogeneity of δ34S ratios of the synthesised barite was tested by LA-MC-ICP-MS with an analytical spot size of 53 μm. The LA-MC-ICP-MS results show that NWU-Brt demonstrates a satisfactory homogeneous composition and is an appropriate material for calibrating δ34S ratios in barite. IRMS and SN-MC-ICP-MS produced mean δ34S values of +14.17 ± 0.42‰ (2s) and +14.27 ± 0.23‰ (2s), respectively. The results of LA-MC-ICP-MS analyses are consistent with the IRMS and SN-MC-ICP-MS ratios within uncertainty. Overall, our results confirm the suitability of NWU-Brt for the calibration of δ34S ratios in barite using LA-MC-ICP-MS.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 2","pages":"411-421"},"PeriodicalIF":3.8,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139923826","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

IAG Membership Information 国际咨询小组成员信息

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-02-15 DOI: 10.1111/ggr.12504

引用次数: 0

The McClure Mountain Syenite Apatite as a Potential Age Control Reference Material for LA-ICP-MS AFT and U-Pb Double Dating 麦克卢尔山闪长岩磷灰石作为 LA-ICP-MS AFT 和 U-Pb 双重定年的潜在年龄控制参考材料

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2024-02-14 DOI: 10.1111/ggr.12545

Nathan Cogné, Alexis Derycke, Kerry Gallagher

{"title":"The McClure Mountain Syenite Apatite as a Potential Age Control Reference Material for LA-ICP-MS AFT and U-Pb Double Dating","authors":"Nathan Cogné, Alexis Derycke, Kerry Gallagher","doi":"10.1111/ggr.12545","DOIUrl":"10.1111/ggr.12545","url":null,"abstract":"Apatite fission track (AFT) dating is now routinely performed using LA-ICP-MS, and U-Pb age data are often acquired at the same time, allowing double dating of individual grains. Furthermore, additional geochemical data, such as REE mass fractions are readily acquired during the analysis. It is therefore of practical interest to identify a single material as a quality control on ages and composition. Here we present AFT and U-Pb data for the McClure Mountain Syenite (MMS) apatite, already widely used as an age reference material by the U-Pb community. We performed double dating on 238 grains, in thirteen measurement sessions over two years. The AFT data show remarkable reproducibility with an overall central age of 254.1 ± 5.1 Ma. The U-Pb results agree with the reference age for individual sessions (and for all data together). The results show that that the McClure Mountain apatite is a valid quality control material for double dating, allowing the use of the same material for both methods. We also propose to extend the quality control using MMS to trace element measurements performed in conjunction AFT and U-Pb dating.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 2","pages":"381-391"},"PeriodicalIF":3.8,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12545","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139766364","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

Geostandards and Geoanalytical Research 地质标准和地质分析研究

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-12-13 DOI: 10.1111/ggr.12543

引用次数: 0