Geostandards and Geoanalytical Research最新文献

{"title":"Probing the 186Os/188Os Precision Barrier: New Recommended Values for the DROsS Reference Material and an Assessment of Mixed 1011 and 1012 Ω Amplifier Arrays","authors":"Pedro Waterton,&nbsp;Sarah Woodland,&nbsp;Graham Pearson,&nbsp;Simon Hansen Serre,&nbsp;Kristoffer Szilas","doi":"10.1111/ggr.12532","DOIUrl":"10.1111/ggr.12532","url":null,"abstract":"<p>We present high precision negative ion thermal ionisation mass spectrometry (N-TIMS) Os isotope measurement results for the DROsS isotope reference material (iCRM), to investigate the limits on the precision of TIMS-based ¹⁸⁶Os/¹⁸⁸Os results. We used analytical conditions previously highlighted to optimise precision, present a new flexible data processing protocol, and measured ¹⁸⁴Os intensities on a Faraday Cup equipped with an amplifier using a 10¹² Ω resistor. Despite a measurement procedure that minimised uncertainty contributions from counting statistics and Johnson-Nyquist noise, the intermediate measurement precision of our approach does not significantly improve on previous high precision Os isotope measurements, with the exception of ¹⁸⁴Os/¹⁸⁸Os. This is probably due to uncertainties in measured amplifier gain factors, which are greater when using mixed arrays of 10¹¹ and 10¹² Ω resistors than when using 10¹¹ Ω resistors alone, though Faraday Cup deterioration could also contribute. We propose that multi-dynamic Os isotope measurements could largely eliminate both of these uncertainties. Our ¹⁸⁴Os/¹⁸⁸Os measurement results are the most precise yet, yielding ¹⁸⁴Os/¹⁸⁸Os = 0.0013036 ± 0.0000007 (2<i>s</i>, <i>n</i> = 38). Additionally, we average our data with published data to recommend the following isotope ratios for DROsS: ¹⁸⁶Os/¹⁸⁸Os = 0.1199319 ± 0.0000024, ¹⁸⁷Os/¹⁸⁸Os = 0.1609227 ± 0.0000022, ¹⁸⁹Os/¹⁸⁸Os = 1.219709 ± 0.000010, ¹⁹⁰Os/¹⁸⁸Os = 1.983793 ± 0.000011.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 1","pages":"109-132"},"PeriodicalIF":3.8,"publicationDate":"2023-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12532","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135462523","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}

{"title":"Effective Leaching of Argillaceous and Dolomitic Carbonate Rocks for Strontium Isotope Stratigraphy","authors":"Xi Chen,&nbsp;Ying Zhou","doi":"10.1111/ggr.12531","DOIUrl":"10.1111/ggr.12531","url":null,"abstract":"<p>Various methods have been developed to extract a primary seawater Sr isotope signal from carbonate rocks for strontium isotope stratigraphy. However, there is little consensus around the best method due to variable sample purity and mineralogy. For this study, we applied sequential leaching to a range of rock samples in order to explore strontium isotope leaching systematics of less favoured argillaceous and dolomitic limestone samples. Following an ammonium acetate (NH₄Ac) prewash that removed ~ 10% of the carbonate fraction, a subsequent dilute acetic acid leach (10–30% aliquot) was shown to extract the lowest, demonstrably least altered seawater ⁸⁷Sr/⁸⁶Sr isotope ratios, along with in most cases seawater-like rare earth element (REE) plus yttrium (Y) patterns with the highest Y/Ho ratios (mostly &gt; 36). Subsequent dissolution steps exhibited significantly elevated ⁸⁷Sr/⁸⁶Sr isotope ratios, Rb/Sr, Al/Ca and Mg/Ca ratios, indicating greater contributions from aluminosilicates and dolomite in the leachates. The new dissolution method by comparison significantly increases the likelihood of obtaining primary seawater ⁸⁷Sr/⁸⁶Sr isotope ratios from argillaceous and dolomitic limestones where the other established procedures failed. Broad application of this approach could improve the temporal resolution of the seawater Sr isotope curve, especially where high purity limestone samples are scarce.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 1","pages":"57-75"},"PeriodicalIF":3.8,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12531","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088358","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}

{"title":"New Potential Sulfide Reference Materials for Microbeam S-Fe-Cu Isotope Measurements","authors":"Yantong Feng,&nbsp;Wen Zhang,&nbsp;Zhaochu Hu,&nbsp;Tao Luo,&nbsp;Qinglin Li,&nbsp;Jinyu Liu","doi":"10.1111/ggr.12530","DOIUrl":"10.1111/ggr.12530","url":null,"abstract":"<p>S-Fe-Cu isotope systems are powerful tracers for revealing geochemical processes. However, the microanalysis of S-Fe-Cu isotopes is critically limited by the lack of suitable reference materials. Herein, we present three potential reference materials Ll-Cpy (chalcopyrite), Ll-Po (pyrrhotite) and Ll-Sp (sphalerite) for <i>in situ</i> S-Fe-Cu isotope measurements. Numerous <i>in situ</i> S-Fe-Cu isotope measurements were performed over two years to assess isotopic homogeneity. The bulk S isotopic compositions were determined independently in seven laboratories by isotope ratio mass spectrometry (IRMS); the preferred δ³⁴S_V-CDT for Ll-Cpy, Ll-Po, Ll-Sp are 6.13 ± 0.37‰ (2<i>s</i>), 6.42 ± 0.37‰ (2<i>s</i>) and 6.28 ± 0.38‰ (2<i>s</i>), respectively. The bulk Fe isotope ratios in Fe-bearing Ll-Cpy and Ll-Po were determined using solution nebulisation multi-collector inductively coupled plasma-mass spectrometry, and the obtained δ⁵⁶Fe_IRMM-014 values are 0.57 ± 0.07‰ (2<i>s</i>) and -0.62 ± 0.07‰ (2<i>s</i>), respectively. The mean bulk δ⁶⁵Cu_{NIST SRM 976} value of Ll-Cpy is 0.57 ± 0.06‰ (2<i>s</i>). All the bulk values are in good agreement with the long-term statistical results of laser ablation-MC-ICP-MS and proposed as the recommended values. These sulfides are well characterised and isotopically homogeneous (at 30–40 μm spatial resolution), and can be used as potential calibration materials for <i>in situ</i> S-Fe-Cu isotope measurements.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 1","pages":"227-244"},"PeriodicalIF":3.8,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135425703","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}

{"title":"Novel Methods for Concomitant Determination of the Stable Zr Isotope Composition, Lu-Hf Isotope Systematics and U-Pb Age of Individual Zircons","authors":"Ninna K. Jensen,&nbsp;Zhengbin Deng,&nbsp;James N. Connelly,&nbsp;Martin Bizzarro","doi":"10.1111/ggr.12529","DOIUrl":"10.1111/ggr.12529","url":null,"abstract":"<p>The stable Zr isotope ratios in zircon yield a novel geochemical tracer that, together with the Lu-Hf and U-Pb radiogenic isotope systems, allows for a better understanding of the magmatic evolution of silicate melts. We present a solution-based procedure for coupled stable Zr, Lu-Hf and U-Pb isotope ratio determinations for individual zircons using a ⁹¹Zr-⁹⁶Zr tracer purified from Hf and a late-spiking protocol for Zr. This method yields high-precision Zr and Hf isotope results while maintaining low blank levels for U-Pb isotope and Lu/Hf ratio determinations. With a two-fold improvement on the precision relative to previous solution-based work, we report δ⁹⁴Zr_IPGP-Zr values (deviation of the ⁹⁴Zr/⁹⁰Zr ratio in the sample relative to the IPGP-Zr reference material) and associated intermediate precisions (2<i>s</i>) for the zircon reference materials 91500, Mud Tank, Plešovice and Penglai of -0.041 ± 0.015‰, 0.018 ± 0.013‰, 0.089 ± 0.020‰ and -0.117 ± 0.021‰, respectively. Furthermore, this method yields un-biased δ⁹⁴Zr_IPGP-Zr and ¹⁷⁶Hf/¹⁷⁷Hf results for 25-ng Zr and 0.56-ng Hf aliquots of the Mud Tank zircon with intermediate precisions (2<i>s</i>) of 0.027‰ and 1.7 ε (parts per ten thousand), respectively. Thus, the presented method is applicable for the analysis of extremely small and rare zircon grains.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 1","pages":"5-28"},"PeriodicalIF":3.8,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12529","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136078398","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}

{"title":"RKV01 Rutile – A New Potential Archaean Reference Material for Microbeam U-Pb Dating","authors":"Chao Huang,&nbsp;Hao Wang,&nbsp;Jin-Hui Yang,&nbsp;Sandra L. Kamo,&nbsp;Jia-Run Tu,&nbsp;Zhen-Hui Hou,&nbsp;Le Zhang,&nbsp;Yue-Heng Yang,&nbsp;Lie-Wen Xie,&nbsp;Shi-Tou Wu,&nbsp;Lei Xu","doi":"10.1111/ggr.12528","DOIUrl":"10.1111/ggr.12528","url":null,"abstract":"<p>Rutile stands as a classical mineral within U-Pb geochronology, offering insights into both magmatic and metamorphic events, and contributing to the understanding of provenance of detrital sedimentary rocks. Addressing the paucity of high-quality Archaean rutile reference materials suitable for microbeam U-Pb dating, we present a natural rutile (RKV01) sourced from the Kaap Valley pluton, South Africa, positing it as a potential Archaean reference material. Major element determination was executed via electron probe microanalysis, while trace element determination was conducted using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). The determination of U-Pb ages involved the application of isotope dilution-thermal ionisation mass spectrometry (ID-TIMS), secondary ion mass spectrometry (SIMS) and LA-ICP-MS. The ID-TIMS mean ²⁰⁷Pb/²⁰⁶Pb age is 3225.61 ± 0.64 Ma (2<i>s</i>, MSWD = 0.83), interpreted as the best estimate for the crystallisation age. The relatively high U mass fraction (~ 83 μg g^-1), extremely low Th mass fraction (~ 0.003 μg g^-1), negligible common Pb and isotopically homogeneous compositions collectively facilitated precise ²⁰⁷Pb/²⁰⁶Pb age determination via microbeam methods. Both LA-ICP-MS and SIMS ²⁰⁷Pb/²⁰⁶Pb ages are characterised by reproducibility and were consistent with the ID-TIMS age within 2<i>s</i> analytical uncertainty. The results underscore the potential of RKV01 rutile as an Archaean reference material for microbeam U-Pb dating.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 1","pages":"245-267"},"PeriodicalIF":3.8,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136254658","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}

{"title":"Refining Boron Isotopic Measurements of Silicate Samples by Multi-Collector-Inductively Coupled Plasma-Mass Spectrometry (MC-ICP-MS)","authors":"André N. Paul,&nbsp;Joseph A. Stewart,&nbsp;Samuele Agostini,&nbsp;Linda A. Kirstein,&nbsp;Jan C.M. De Hoog,&nbsp;Ivan P. Savov,&nbsp;Kristina Walowski,&nbsp;James W.B. Rae,&nbsp;Tim Elliott","doi":"10.1111/ggr.12527","DOIUrl":"10.1111/ggr.12527","url":null,"abstract":"<p>Solution MC-ICP-MS is an established technique for high precision boron isotope measurement results (δ¹¹B_{SRM 951}) in carbonates, yet its application to silicate rocks has been limited. Impediments include volatilisation during silicate dissolution and contamination during chemical purification. To address this, we present a low-blank sample preparation procedure that couples hydrofluoric acid-digestion and low-temperature evaporation (mannitol-free), to an established MC-ICP-MS measurement procedure following chemical purification using B-specific Amberlite IRA 743 resin. We obtain accurate δ¹¹B_{SRM 951} values (intermediate precision ±0.2‰) for boric acid (BAM ERM-AE121 19.65 ± 0.14‰) and carbonate (NIST RM 8301 (Coral) 24.24 ± 0.11‰) reference materials. For silicate reference materials covering mafic to felsic compositions we obtain δ¹¹B_{SRM 951} with intermediate precision &lt; ±0.6‰ (2<i>s</i>), namely JB-2 6.9 ± 0.4‰; IAEA-B-5 -6.0 ± 0.6‰; IAEA-B-6 -3.9 ± 0.5‰ (2<i>s</i>). Furthermore, splits of these same reference materials were processed by an alternative fusion and purification procedure. We find excellent agreement between δ¹¹B_{SRM 951} measurement results by MC-ICP-MS of the reference materials using both sample processing techniques. These measurement results show that our sample processing and MC-ICP-MS methods provide consistent δ¹¹B_{SRM 951} values for low B-mass fraction samples. We present new data from Mid Ocean Ridge Basalt (MORB) glass, documenting a range in δ¹¹B_{SRM 951} from -5.6 ± 0.3‰ to -8.8 ± 0.5‰ (2<i>s</i>), implying some upper mantle δ¹¹B_{SRM 951} heterogeneity.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 1","pages":"91-108"},"PeriodicalIF":3.8,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12527","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547285","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}

{"title":"δ238U of Coal Reference Materials Determined by MC-ICP-MS","authors":"Jiaru Sheng,&nbsp;Siqi Li,&nbsp;Jeremy D. Owens,&nbsp;Xiangli Wang,&nbsp;Yong Wei,&nbsp;Guodong Ming,&nbsp;Fang Huang","doi":"10.1111/ggr.12526","DOIUrl":"10.1111/ggr.12526","url":null,"abstract":"<p>Uranium (U) associated with coal can be an important source of U and result in environmental pollution during coal combustion. In this study, we developed a method for measurement of U isotope ratios in coals using multiple-collector inductively coupled plasma-mass spectrometry. The ²³³U-²³⁶U double-spike was utilised to calibrate the instrumental isotopic fractionation. High-pressure bomb and dry ashing were adopted to digest the coal samples. The δ²³⁸U_CRM-145 values obtained from the two different digestion procedures were in good agreement. The δ²³⁸U_CRM-145 of seven coal and one fly ash reference materials are reported. Furthermore, the results of fly ash, bottom ash and feed coal samples reveal that the combustion processes lead to relatively small U isotopic fractionation between the samples within the same coal-fired power plant, indicating that U isotope data can be used as a tracer for heavy metal pollution resulting from coal combustion. The U isotope measurement method of coal established in this study provides technical support to understand the behaviour of U during coal formation and combustion.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 1","pages":"289-299"},"PeriodicalIF":3.8,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134904384","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}

{"title":"Natural Ti-Rich Mineral (Ilmenite, Titanite and Perovskite) Reference Materials for In Situ Ti Isotopic Measurement by LA-MC-ICP-MS","authors":"Hong Liu,&nbsp;Zhengbin Deng,&nbsp;Zhaochu Hu,&nbsp;Wen Zhang,&nbsp;Martin Schiller,&nbsp;Martin Bizzarro,&nbsp;Yongsheng Liu,&nbsp;Zaicong Wang,&nbsp;Lanping Feng,&nbsp;Ming Li","doi":"10.1111/ggr.12525","DOIUrl":"10.1111/ggr.12525","url":null,"abstract":"<p>Iron-titanium oxides such as ilmenite (FeTiO₃), titanite (CaTiSiO₅) and perovskite (CaTiO₃) are the common Ti-rich mineral phases crystallised during magmatic and metamorphic processes on Earth. Depending on magma types or conditions of phase equilibria, formation of these Ti-rich minerals can result in Ti isotopic fractionation in the range of -1.52‰ to +2.90‰ on δ⁴⁹Ti_OL-Ti (i.e., the per mil difference of ⁴⁹Ti/⁴⁷Ti ratio relative to the OL-Ti reference material), making the Ti isotope ratios of these minerals potential tracers for conditions of magmatism and metamorphism. Due to their resistance to aqueous alteration, these Ti-rich accessory minerals are also commonly present as pristine, detrital phases in sedimentary rocks, which offer an opportunity to study the evolution of magmatism and metamorphism throughout the Earth's geological history. Here we have developed a novel technique for <i>in situ</i> Ti isotopic measurement in ilmenite, titanite and perovskite using femtosecond laser ablation multi-collector inductively coupled plasma-mass spectrometry (fs-LA-MC-ICP-MS) under wet plasma conditions. Samples were ablated with different laser spot sizes (15–50 μm) and different laser energy densities (0.6–4.2 J cm^-2) to obtain adequate Ti signal intensity at a fixed laser repetition rate of 2 Hz. When ⁴⁹Ti signal intensity of samples ranged from 0.3 to 3.7 V, no significant signal-dependent Ti isotopic fractionation was observed under wet plasma conditions. Repeated measurements on twelve Ti-rich minerals using different analytical protocols provided comparable δ⁴⁹Ti_OL-Ti values within uncertainties, confirming the accuracy of the proposed fs-LA-MC-ICP-MS method. With one exception (i.e., RUS1), all analysed minerals are homogeneous in their Ti isotopic compositions between individual chips with an intermediate precision of ±0.13‰ to ±0.17‰ (2<i>s</i>) on δ⁴⁹Ti_OL-Ti. Collectively, these minerals record a significant δ⁴⁹Ti_OL-Ti variation ranging from -0.46‰ to +2.12‰. These warrant the suitability of these materials as Ti isotopic reference materials for <i>in situ</i> Ti isotopic measurement.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"48 1","pages":"269-287"},"PeriodicalIF":3.8,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88810277","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}

{"title":"Optimisation of LA-ICP-MS/MS Rb-Sr Dating of Micas with Non-Matrix-Matched Reference Materials","authors":"Shiqiang Huang,&nbsp;Zhaoshan Chang,&nbsp;Kairan Liu,&nbsp;Dieter Garbe-Schönberg","doi":"10.1111/ggr.12524","DOIUrl":"10.1111/ggr.12524","url":null,"abstract":"<p>The recent development of LA-ICP-MS/MS techniques enables <i>in situ</i> Rb-Sr dating of micas, but there is not yet a matrix-matched reference material (RM). In this contribution we optimised laser conditions and developed a new data reduction approach for Rb-Sr dating of micas with non-matrix-matched RMs Mica-Mg-NP and NIST SRM 612. This was achieved by systematically investigating the effects of laser ablation settings, data reduction methods and the selection of the RMs on the Rb-Sr dating quality of a 306 ± 1 Ma hydrothermal muscovite. We then tested this approach using twelve mica samples with known ages from 306 to 1.4 Ma. The results show that this technique can achieve accuracy of 2.5% or better, and precision of ~1–3% for micas &gt; 15 Ma. The dating accuracy (&gt; 9%) and precision (&gt; 21%) decrease for micas younger than 5 Ma due to the short radiogenic accumulation time. This technique provides a way to date many types of mineral deposits and rocks, with a relatively high spatial resolution (down to 38 μm), a fast turnaround time and a higher closure temperature for muscovite than the Ar-Ar system, which makes it a powerful tool in geochronological studies.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 4","pages":"725-747"},"PeriodicalIF":3.8,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78097671","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}

{"title":"IAG Membership Information","authors":"","doi":"10.1111/ggr.12436","DOIUrl":"https://doi.org/10.1111/ggr.12436","url":null,"abstract":"","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"47 3","pages":"713"},"PeriodicalIF":3.8,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12436","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50124713","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}