Geostandards and Geoanalytical Research最新文献_第9页

Determination of Lu and Hf Mass Fractions and 176Hf/177Hf Ratios in Mafic-Ultramafic Rock Reference Materials by Multi-Collector Inductively Coupled Plasma-Mass Spectrometry 利用多收集器电感耦合等离子体质谱法测定岩浆岩-超岩浆岩标准物质中的铷和铪质量分数以及 176Hf/177Hf 比率

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-05-24 DOI: 10.1111/ggr.12513

Qian Ma, Yue-Heng Yang, Zhi-Ming Yang

{"title":"Determination of Lu and Hf Mass Fractions and 176Hf/177Hf Ratios in Mafic-Ultramafic Rock Reference Materials by Multi-Collector Inductively Coupled Plasma-Mass Spectrometry","authors":"Qian Ma, Yue-Heng Yang, Zhi-Ming Yang","doi":"10.1111/ggr.12513","DOIUrl":"10.1111/ggr.12513","url":null,"abstract":"Reported data for Lu, Hf mass fractions and 176Hf/177Hf isotopic ratios of mafic-ultramafic rock reference materials (RMs) are rare at present, hampering the comparison of data quality between difference laboratories. Herein, we measured the Lu and Hf mass fractions and the 176Hf/177Hf isotopic ratios of ten mafic-ultramafic rock RMs, including OKUM (komatiite), WPR-1 (serpentinised peridotite), NIM-N (norite), NIM-P (pyroxenite), UB-N (serpentinised peridotite), JP-1 (peridotite), NIM-D (dunite), MUH-1 (serpentinised harzburgite), HARZ01 (harzburgite), DTS-2b (dunite), which contain extremely low amounts of Lu and Hf (Lu, 2–150 ng g−1; Hf, 5–500 ng g−1). All measurements were conducted on a Neptune Plus multi-collector inductively coupled plasma-mass spectrometer employing an Aridus II desolvator inlet system and Jet sample/X skimmer cone configuration. The following RMs, OKUM, WPR-1, UB-N, JP-1, NIM-D, HARZ01 and DTS-2b, have 176Hf/177Hf precision of less than 60 ppm (2s) at test portions of 0.06 to 0.3 g, and are good ultramafic RMs for Lu-Hf systems. In contrast, significant Hf mass fraction and isotopic variability were observed in NIM-N, NIM-P and MUH-1 at test portion masses of 0.1 to 0.3 g. Collectively, our study provides a new database that can be used by the geochemical community for evaluating the Lu-Hf system of mafic-ultramafic rocks.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 4","pages":"869-891"},"PeriodicalIF":3.8,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78178615","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

STDGL3, a Reference Material for Analysis of Sulfide Minerals by Laser Ablation ICP-MS: An Assessment of Matrix Effects and the Impact of Laser Wavelengths and Pulse Widths STDGL3，一种通过激光烧蚀ICP-MS分析硫化物矿物的参考材料：基质效应的评估以及激光波长和脉冲宽度的影响

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-05-21 DOI: 10.1111/ggr.12512

Ivan Belousov, Leonid Danyushevsky, Karsten Goemann, Sarah Gilbert, Paul Olin, Jay Thompson, Elena Lounejeva, Dieter Garbe-Schönberg

{"title":"STDGL3, a Reference Material for Analysis of Sulfide Minerals by Laser Ablation ICP-MS: An Assessment of Matrix Effects and the Impact of Laser Wavelengths and Pulse Widths","authors":"Ivan Belousov, Leonid Danyushevsky, Karsten Goemann, Sarah Gilbert, Paul Olin, Jay Thompson, Elena Lounejeva, Dieter Garbe-Schönberg","doi":"10.1111/ggr.12512","DOIUrl":"https://doi.org/10.1111/ggr.12512","url":null,"abstract":"A new reference material, STDGL3, for the calibration of in situ analyses of sulfide minerals by LA-ICP-MS has been developed and characterised. It represents a lithium-borate-based glass containing a mixture of Zn- and Fe-sulfide concentrates doped with several chalcophile elements as well as Zr, Gd, Hf and Ta required for assessing common interferences on Ag, Au and Pt. STDGL3 has a wider range of elements and a better homogeneity compared with existing reference materials for LA-ICP-MS analysis of sulfides. Compositional variations for most elements are below 3% RSD, below 5% RSD for Ag, Au and Pt, and below 7% RSD for Se, when performing spot analyses with a 50 μm beam size. Its preparation recipe is reproducible allowing for multiple batches to be made. Use of STDGL3 significantly improves accuracy of sulfide mineral analysis by LA-ICP-MS when compared with use of other available reference materials. Performance of STDGL3 was evaluated using several different laser systems. No significant change was observed between 193 nm ArF excimer lasers with 5 and 20 ns pulse widths, but use of 213 and 248 nm lasers displays more systematic differences, especially when analysing galena. Correction coefficients are needed for some elements (Zn and Cd in particular) when analysing sulfide minerals using STDGL3 as a calibration reference material.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 3","pages":"493-508"},"PeriodicalIF":3.8,"publicationDate":"2023-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12512","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50140245","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: 3

Sources of Inaccuracy in Boron Isotope Measurement Using LA-MC-ICP-MS LA-MC-ICP-MS测量硼同位素的不准确性来源

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-05-16 DOI: 10.1111/ggr.12511

Jan Fietzke, Eleni Anagnostou

{"title":"Sources of Inaccuracy in Boron Isotope Measurement Using LA-MC-ICP-MS","authors":"Jan Fietzke, Eleni Anagnostou","doi":"10.1111/ggr.12511","DOIUrl":"https://doi.org/10.1111/ggr.12511","url":null,"abstract":"Laser ablation multi-collector-inductively coupled plasma-mass spectrometry (LA-MC-ICP-MS) has become a valuable tool for the in situ measurement of the boron isotope composition of geological samples at high (tens to hundreds of μm) spatial resolution. That said, this application suffers from significant analytical challenges. We focus in this study on the underlying processes of two of the main causes for inaccuracies using this technique. We provide empirical evidence that not only Ca ions (Sadekov et al. 2019, Standish et al. 2019, Evans et al. 2021) but also Ar ions, that are reflected within the flight tube of the mass spectrometer, are the source for previously reported issues with spectral baselines. We also address the impact of plasma conditions on the instrumental mass fractionation as a source for matrix- and mass-load-related analytical biases. Comparing experimental data with the results of a dedicated release and diffusion model (RDM) we estimate that a close to complete (~ 97%) release of boron from the sample aerosol is needed to allow for consistently accurate LA boron isotope measurement results without the need for corrections.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 3","pages":"481-492"},"PeriodicalIF":3.8,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12511","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50135048","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

IAG Membership Information 国际航空集团会员信息

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-05-15 DOI: 10.1111/ggr.12434

引用次数: 0

Constant 4He Concentration and 190Pt-4He age of Detrital Pt-Alloy Grains from the Santiago River, Ecuador: Potential as a 4He Mineral Reference Material 厄瓜多尔圣地亚哥河铂合金碎片的恒定 4He 浓度和 190Pt-4He 年龄：作为 4He 矿物参考材料的潜力

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-05-14 DOI: 10.1111/ggr.12502

Olga V. Yakubovich, Finlay M. Stuart, Ekaterina S. Ivanova, Fernando Gervilla

{"title":"Constant 4He Concentration and 190Pt-4He age of Detrital Pt-Alloy Grains from the Santiago River, Ecuador: Potential as a 4He Mineral Reference Material","authors":"Olga V. Yakubovich, Finlay M. Stuart, Ekaterina S. Ivanova, Fernando Gervilla","doi":"10.1111/ggr.12502","DOIUrl":"10.1111/ggr.12502","url":null,"abstract":"Over the last few decades geo- and thermochronological techniques based on the accumulation of radiogenic 4He in minerals have gained popularity. Currently there is no mineral-based 4He reference material that allows routine screening of gas extraction and measurement procedures. The commonly-used mineral reference material for (U-Th)/He thermochronology have variable U and Th contents which result in variable 4He concentrations. Here we demonstrate that native platinum grains (RS-Pt) from placer deposits in the Santiago River, Ecuador, yield constant 4He contents and may be used as a reference material. Helium concentrations measured at the Scottish Universities Environmental Research Centre (n = 8) and Institute of Precambrian Geology and Geochronology RAS (n = 9) noble gas laboratories yield mean 4He concentrations that overlap at the 95% confidence level. The weighted mean 4He concentration is 215 ± 4 × 1011 at g-1 (2s) and mean 190Pt-4He age is 39.6 ± 0.7 Ma (2s). Samples of the Santiago River Pt concentrate are available on request from the SUERC laboratory.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 4","pages":"957-968"},"PeriodicalIF":3.8,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78144430","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

Uranium Isotope Ratios of Twenty-nine Geological Rock Reference Materials Measured by MC-ICP-MS 用 MC-ICP-MS 测量 29 种地质岩石参考材料的铀同位素比率

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-05-11 DOI: 10.1111/ggr.12501

Xuefeng Wang, Xiangli Wang, Lisheng Wang, Shitou Wu, Dingshuai Xue, Wuhui Duan, Zhibang Ma, Jule Xiao, Xianhua Li

{"title":"Uranium Isotope Ratios of Twenty-nine Geological Rock Reference Materials Measured by MC-ICP-MS","authors":"Xuefeng Wang, Xiangli Wang, Lisheng Wang, Shitou Wu, Dingshuai Xue, Wuhui Duan, Zhibang Ma, Jule Xiao, Xianhua Li","doi":"10.1111/ggr.12501","DOIUrl":"10.1111/ggr.12501","url":null,"abstract":"Uranium isotope ratios are reported for twenty-nine geological reference materials (RMs) including igneous, metamorphic and sedimentary rocks, as well as sediments. Measurements were conducted on a multi-collector inductively coupled plasma-mass spectrometer (MC-ICP-MS) using the 233U-236U double spike technique. These RMs possess a wide range of matrices with U mass fractions ranging from 0.11 μg g-1 to 18.7 μg g-1. The δ234/238U values (relative to the n(234U)/n(238U) ratio at secular equilibrium) show minor fluctuations around the secular equilibrium value except for two Pleistocene speleothem RMs. The δ238/235U values (relative to the value for NBL CRM 112a (NBS SRM 960)) of igneous rocks and metamorphic rocks are within the range of the continental crust value (-0.29 ± 0.03‰, 95% CI). The δ238/235U value for sedimentary rock and sediment RMs spans a wide range of 0.98‰, suggesting significant 238U/235U isotopic fractionation in low temperature environments. The range of δ238/235U RMs reported in this study (-0.63‰ to 0.35‰) exceeds that of previous RMs (-0.61‰ to 0.17‰), allowing inter-laboratory calibration of wider ranges of geological and environmental samples.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 4","pages":"945-955"},"PeriodicalIF":3.8,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82017413","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

Columbite SN3: A New Potential Reference Material for U-Pb Dating by LA-ICP-MS 铌矿SN3：一种新的有潜力的LA-ICP-MS U-Pb定年参考物质

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-05-03 DOI: 10.1111/ggr.12500

Lu Xiang, Rucheng Wang, Rolf L. Romer, Xudong Che, Huan Hu, Zhimin Tang

{"title":"Columbite SN3: A New Potential Reference Material for U-Pb Dating by LA-ICP-MS","authors":"Lu Xiang, Rucheng Wang, Rolf L. Romer, Xudong Che, Huan Hu, Zhimin Tang","doi":"10.1111/ggr.12500","DOIUrl":"https://doi.org/10.1111/ggr.12500","url":null,"abstract":"Columbite-tantalite LA-ICP-MS U-Pb dating is a fast and useful method to determine the age of rare-metal deposits and fingerprint the provenance of columbite-tantalite ore concentrates. Accurate LA-ICP-MS U-Pb dating requires matrix-matched reference materials. We analysed three columbite-tantalite samples (SN3, HND and RL2) from China using ID-TIMS and LA-ICP-MS to assess their potential as reference materials for in situ U-Pb dating. Coltan 139 and these three columbite-tantalite samples with variable compositions yielded internally consistent LA-ICP-MS U-Pb ages when using each other for calibration and the weighted mean 206Pb/238U ages are comparable to respective ID-TIMS ages. Composition-dependent U-Pb fractionation seems to be insignificant under the LA-ICP-MS conditions used. Sample SN3 has a low percentage of heterogeneity for 206Pb/238U ages (4%) with low common Pb contributions (f206 < 1%) and shows a good potential in calibrating unknown samples as primary reference material for LA-ICP-MS analysis. Samples RL2 and HND have altered sections characterised by high LREE contents, flat LREE patterns and old 206Pb/238U apparent ages, and are not suited as reference materials. The low 207Pb/206Pb intercepts for samples RL2 and HND lack geological meaning but provide strong evidence that the disturbed U-Pb systematics with anomalous apparent 206Pb/238U ages is a secondary feature.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 3","pages":"609-628"},"PeriodicalIF":3.8,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50119362","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: 1

Zinc Isotope Measurement by MC-ICP-MS in Geological Certified Reference Materials 利用 MC-ICP-MS 测量地质认证标准物质中的锌同位素

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-04-28 DOI: 10.1111/ggr.12499

Jing Wang, Dong-Mei Tang, Qing-Han Yuan, Ben-Xun Su, Wen-Jun Li, Bing-Yu Gao, Zhi-An Bao, Ye Zhao

{"title":"Zinc Isotope Measurement by MC-ICP-MS in Geological Certified Reference Materials","authors":"Jing Wang, Dong-Mei Tang, Qing-Han Yuan, Ben-Xun Su, Wen-Jun Li, Bing-Yu Gao, Zhi-An Bao, Ye Zhao","doi":"10.1111/ggr.12499","DOIUrl":"10.1111/ggr.12499","url":null,"abstract":"Here we present an analytical method for Zinc (Zn) isotopic measurements using “standard-sample bracketing” on a Nu Sapphire multi-collector inductively coupled plasma-mass spectrometer. The effects of Zn mass fraction and HNO3 molarity mismatch between the standard and the sample, as well as the presence of matrix elements have been evaluated. Long-term reproducibility of better than ±0.03‰ for δ66Zn (2s) was routinely obtained. Accurate measurements were achieved when CNi/CZn < 0.001, CTi/CZn < 0.03, CBa/CZn < 0.05, CNa/CZn and CAl/CZn < 0.5, CMg/CZn < 0.1, CFe/CZn < 5 and CCu/CZn as well as CCd/CZn < 10. High-precision Zn isotopic determination were performed on twenty-one widely available geological certified reference materials, with an overall range of ~ 0.62‰ (0.15 to 1.07‰), which is nearly twenty times the current analytical precision (0.03), and the results are in agreement with most previously published data within 2s. Among them, δ66ZnJMC 3-0749L of eleven geological certified reference materials are reported for the first time: 0.22 ± 0.03‰ (dolerite, DR-N), 0.23 ± 0.02‰ (gabbro, GSR-10), 0.20 ± 0.04‰ (microgabbro, PM-S), 0.15 ± 0.02‰ (andesite, GSR-2), 0.22 ± 0.08‰ (diorite, GSR-9), 0.19 ± 0.07‰ (syenite, GSR-7), 0.30 ± 0.06‰ (granite, GSR-1), 0.25 ± 0.00‰ (rhyolite, GSR-11), 0.37 ± 0.01‰ (shale, GSR-5), 0.21 ± 0.03‰ (limestone, GSR-6) and 0.20 ± 0.03‰ (hornblendite, GSR-15). The novel Zn isotopic data from these certified reference materials can be used for future interlaboratory comparisons.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 4","pages":"969-982"},"PeriodicalIF":3.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75026534","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

Initial Characterisation of SK01 Sanidine: A Candidate 40Ar/39Ar Reference Material 候选40Ar/39Ar参比材料SK01萨尼丁的初步表征

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-04-05 DOI: 10.1111/ggr.12497

Youjuan Li, Brian R. Jicha, Wanfeng Zhang, Wen Chen, Brad S. Singer, Dewen Zheng, Huaiyu He

{"title":"Initial Characterisation of SK01 Sanidine: A Candidate 40Ar/39Ar Reference Material","authors":"Youjuan Li, Brian R. Jicha, Wanfeng Zhang, Wen Chen, Brad S. Singer, Dewen Zheng, Huaiyu He","doi":"10.1111/ggr.12497","DOIUrl":"https://doi.org/10.1111/ggr.12497","url":null,"abstract":"The precision and accuracy of 40Ar/39Ar dates are ultimately linked to co-irradiated reference materials of known age. Here we provide new data from the SK01 sanidine, which was analysed in three different laboratories to evaluate it as a 40Ar/39Ar reference material. Aliquots of 5 mg, incrementally heated in two laboratories, yielded indistinguishable results with a weighted mean age of 27.58 ± 0.06 Ma (95% confidence level). Single-crystal step heating and single-crystal total fusion analyses of SK01 sanidine were undertaken in the third laboratory to further test the intracrystalline homogeneity. For the seven step-heating analyses, six crystals yielded nearly concordant age spectra with 40Ar/39Ar ages ranging from 26.853 ± 0.094 Ma to 26.963 ± 0.067 Ma, whereas one crystal gave an older age of 27.774 ± 0.071 Ma with a slightly discordant age spectrum. Twenty-three single-crystal total fusion analyses yielded 40Ar/39Ar ages ranging from 27.070 ± 0.108 Ma to 27.736 ± 0.062 Ma with a dispersion of ~ 3.8%. The older ages from single-crystal total fusion dates are interpreted to reflect an inherited or excess argon component in some crystals. This is an initial characterisation of the SK01 sanidine, and additional work needs to be conducted to further evaluate the age dispersion so that it can be utilised as a 40Ar/39Ar reference material.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 3","pages":"657-668"},"PeriodicalIF":3.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50121224","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

ID-TIMS Sm-Nd and Sr Isotope Ratios of Reference Material Basalt Ribeirão Preto (BRP-1) 里贝朗普雷图玄武岩 (BRP-1) 的 ID-TIMS Sm-Nd 和 Sr 同位素比率

IF 3.8 2区地球科学

Geostandards and Geoanalytical Research Pub Date : 2023-04-05 DOI: 10.1111/ggr.12498

Carla Neto, Claudio de Morisson Valeriano, Jacinta Enzweiler, Gabriel Paravidini, Manuela Carvalho, Monica Heilbron, Cristiano Lana, João Henrique Larizzatti

{"title":"ID-TIMS Sm-Nd and Sr Isotope Ratios of Reference Material Basalt Ribeirão Preto (BRP-1)","authors":"Carla Neto, Claudio de Morisson Valeriano, Jacinta Enzweiler, Gabriel Paravidini, Manuela Carvalho, Monica Heilbron, Cristiano Lana, João Henrique Larizzatti","doi":"10.1111/ggr.12498","DOIUrl":"10.1111/ggr.12498","url":null,"abstract":"This work presents Sm-Nd and Sr isotopic ratios of the BRP-1 (“Basalt Ribeirão Preto”) reference material (RM) based on repeated TIMS measurements over twelve years carried out by the LAGIR laboratory, Brazil. The BRP-1 RM was produced by the Brazilian Geological Survey from a ca. 130 Ma within-plate basalt, collected from a quarry near Ribeirão Preto city in the Paraná basin. Isotope ratios were measured using a TRITON mass spectrometer. Instrumental bias and fractionation corrections were performed based on repeated measurements of the certified RMs JNdi-1 and NIST SRM 987. The measured Nd and Sr isotopic ratios of BRP-1 are: 143Nd/144Nd = 0.512408 ± 0.000010 (2s), and 87Sr/86Sr = 0.706011 ± 0.000017 (2s). The mass fractions of Sm and Nd are 11.0 ± 0.2 and 51.9 ± 0.6 μg g-1, respectively, showing no significant differences compared with the accepted values from the literature. No significant difference between measurements was observed, whether digesting samples in single or batch mode, using metal-jacketed PTFE bombs or PFA vials, or with or without the addition of a spike. The accuracy of these results was evaluated through the measurement of well-characterised USGS RMs, such as AGV-1, BCR-1, BHVO-1, G-2 and GSP-1.","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 4","pages":"841-854"},"PeriodicalIF":3.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81581232","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: 1