Article
Geochemistry & Geophysics
Martin Guitreau, Abdelmouhcine Gannoun, Zhengbin Deng, Marc Chaussidon, Frederic Moynier, Bernard Barbarin, Johanna Marin-Carbonne
Summary: This study investigates the silicon isotope signatures of zircon in various granite types to understand their fractionation behavior, which can be useful in studying magma evolution and identifying granite source areas. Silicon isotope ratios in zircon can track changes in magma temperature and composition, revealing complex processes like magma mingling, fractional crystallization, and multiple sources. The study highlights that silicon isotopes in zircon can complement existing techniques in granite studies and should not be used in isolation.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Anthropology
J. A. Stephens, M. N. Ducea, D. J. Killick, J. Ruiz
Summary: Recent analytical developments in mass spectrometry have enabled accurate measurements of "non-traditional" isotopic ratios of elements, with research aiming to infer the geological provenance of archaeological materials. However, limited ranges of isotopic ratios and extensive overlap between geological sources currently hinder the usefulness of these isotopic systems for provenance inference.
JOURNAL OF ARCHAEOLOGICAL SCIENCE
(2021)
Article
Geochemistry & Geophysics
Fang Liu, Mingxing Ling, Zhaofeng Zhang, Wenning Lu, Jianbing Xu, Xin Li, Di Yang, Jiaojiao Wu, Hong Yang
Summary: This study reports stable cerium (Ce) isotopic compositions of terrestrial rocks and investigates Ce isotopic fractionation during column chemistry. The Ce isotopes were separated using a single-stage extraction technique and measured using a Thermo Scientific Neptune Plus MC-ICP-MS. Data accuracy and precision were examined by two different laboratories.
Article
Geochemistry & Geophysics
Deze Liu, Frederic Moynier, Paolo A. Sossi, Raphael Pik, Saemundur Ari Halldorsson, Edward Inglis, James M. D. Day, Julien Siebert
Summary: Indium (In) behaves as a moderately volatile metal during nebular and planetary processes and its volatility depends on oxygen fugacity. Accurately determining the isotopic composition of In in silicate Earth is challenging due to its low abundance in rocks and significant isobaric interferences. This study presents a purification procedure for In and reports the first dataset of its isotopic compositions in terrestrial igneous rocks, showing no significant variation between different types of basalts. The average δ115In of 0.35‰ (2SD) in basalts represents the best estimate of the In isotopic composition of the mantle and the bulk silicate Earth.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Spectroscopy
Xiaoqiang Li, Guilin Han, Qian Zhang, Rui Qu, Zhuang Miao
Summary: Lithium isotopes are useful for tracking the evolution of continental silicate weathering and maintaining Earth's long-term climate stability. A new optimization of dual-column chromatography allows for high precision determination of lithium isotope ratios in various geological samples. The method has been shown to be reproducible and reliable.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2022)
Article
Geochemistry & Geophysics
Yogita Kadlag, Michael Tatzel, Daniel A. Frick, Harry Becker, Philipp Kuehne
Summary: Chondrules in undifferentiated meteorites are silicate melt droplets with variable texture and composition. Si isotope ratios and element compositions of chondrules in the Allende CV3 chondrite were determined to understand the formation mechanisms and conditions, suggesting that chondrules and matrix likely formed in nebular settings rather than by asteroid impacts.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Lei Xu, Jin-Hui Yang, Hao Wang, Youlian Li, Bao-Quan Zhou, Yue-Heng Yang, Chao Huang, Lie-Wen Xie, Shi-Tou Wu
Summary: This study investigated natural plagioclase samples from the Badaling intrusive complex in Beijing to evaluate their suitability as a plagioclase Sr isotope reference material. The results showed that the plagioclase crystals had low Rb/Sr ratios, low HREEs, and high Sr contents, making them suitable for Sr isotope analysis. LA-MC-ICP-MS analysis confirmed consistent Sr isotopic compositions, which matched solution-based data, indicating that these plagioclase samples can serve as potential reference materials for microbeam Sr isotope analysis.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Review
Chemistry, Analytical
Peijie Zuo, Yuming Huang, Jianzhou Bi, Weichao Wang, Wei Li, Dawei Lu, Qinghua Zhang, Qian Liu, Guibin Jiang
Summary: Atmospheric particulate matter (PM) pollution is a severe environmental problem worldwide, associated with various diseases. Stable isotopes have been used as valuable tracers to identify and constrain pollution sources, which is crucial for mitigating the impact of PM.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2023)
Article
Geochemistry & Geophysics
Tianli Zhang, Jia Liu, Qun Zhang, Yingnan Zhang, Liping Qin
Summary: This study presents high-precision W isotopic measurement results using the W-180-W-183 double spike technique. The effects of isobaric and polyatomic interferences on the measurement were evaluated. The study found that the measurement results were not significantly affected by certain elements when their concentrations were below certain thresholds. The measurement precision of standard solutions and geological reference materials were within an acceptable range. Additionally, the study compared the W isotopic compositions of two major tungsten ore minerals, providing a new tool for studying hydrothermal mineralisation processes and the W cycle of geological reservoirs.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2023)
Article
Geochemistry & Geophysics
Francois L. H. Tissot, Mauricio Ibanez-Mejia
Summary: Stable isotopes provide insights into processes across various scales. Advances in mass-spectrometry have enabled the analysis of smaller and smaller samples, bringing heavy stable isotope geochemistry to the single-crystal scale. Isotopes of heavy elements can be used to reconstruct magma thermal histories, crystal growth timescales, and possibly magma redox conditions at the single-crystal and subcrystal scales.
Article
Geochemistry & Geophysics
Katrin Weber, Michael Weber, Martina Menneken, Anna G. Kral, Regina Mertz-Kraus, Thorsten Geisler, Jochen Vogl, Thomas Tuetken
Summary: Experimental alteration of dental tissues from modern African elephants reveals that temperature and acidity can affect isotope ratios and element distribution in teeth, with enamel being more resistant to changes compared to dentin.
Article
Biochemistry & Molecular Biology
Kaj Vaughan Sullivan, Yasmina Assantuh, Rosa Grigoryan, Marta Costas-Rodriguez, Eduardo Bolea-Fernandez, Bruno Lapauw, Steven Van Laecke, Frank Vanhaecke
Summary: Hypomagnesemia, a condition often found in type 1 diabetes mellitus (T1DM) patients, has become less prevalent due to improved treatment. However, a recent study found that disruptions to magnesium homeostasis still persist in T1DM patients. This study aimed to investigate the temporal variability in serum magnesium isotopic composition before and after insulin injection or meal consumption. The results showed a significant difference in serum magnesium isotopic composition between T1DM patients and controls, but no significant difference was observed before and after insulin injection/meal consumption. This suggests that the timing of the most recent meal may not affect serum magnesium isotopic composition.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Geochemistry & Geophysics
Hyeryeong Jeong, Kongtae Ra, Jin Young Choi
Summary: The study utilized MC-ICP-MS technology and optimized column separation methods to successfully measure Cu, Zn, and Pb isotope data in commercially available reference materials, showing high yields without isotopic fractionation, and good agreement with previous research.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2021)
Article
Chemistry, Analytical
Katerina Rodiouchkina, Ilia Rodushkin, Steven Goderis, Frank Vanhaecke
Summary: Sulfur isotope ratios are commonly used as tracers to study sulfur cycle processes in modern and ancient environments. However, there is a lack of well-characterized isotopic reference materials. This study aimed to provide a comprehensive set of sulfur isotope ratio data for various commercially available biological and geological reference materials. Different sample preparation protocols were evaluated, and the measurements were done at multiple laboratories using multi-collector inductively coupled plasma-mass spectrometry. The results showed good agreement between laboratories and instrumental generations, and the determined delta S-34 and delta S-33 values were consistent with literature values.
ANALYTICA CHIMICA ACTA
(2023)
Article
Environmental Sciences
Daniel F. Araujo, Joel Knoery, Nicolas Briant, Emmanuel Ponzevera, Tiphaine Chouvelon, Isabelle Auby, Santiago Yepez, Sandrine Bruzac, Teddy Sireau, Anne Pellouin-Grouhel, Farida Akcha
Summary: Metal release from anthropogenic activities can pose risks to ecosystems and human health. This study used Cu isotopes in Pacific oysters to monitor anthropogenic Cu accumulation in marine environments. The results showed a correlation between Cu isotope compositions and exposure levels to continental Cu sources, highlighting the potential for using stable isotope techniques for metal bioaccumulation monitoring.
ENVIRONMENTAL POLLUTION
(2021)
Article
Geochemistry & Geophysics
Wenjun Li, Jing Wang, Mengmeng Cui, Xia Liu, Lihui Jia, Kaiyun Chen, Shitou Wu, Bingyu Gao, Dingshuai Xue, Yanhong Liu, Chao Li, Yang Luo, Benxun Su
Summary: Two clinopyroxene megacrysts, DMP-2 and DMP-3, from Cenozoic alkali basalts in Hannuoba region of China were characterized for major and trace element compositions through in situ microanalysis. Both clinopyroxene samples showed homogeneity in element mass fractions based on EPMA and LA-ICP-MS analyses. Bulk analyses using XRF, ICP-OES and solution ICP-MS techniques also revealed consistent major and trace element data. Thus, these samples can serve as potential reference materials for elemental in situ microanalysis, with recommended element mass fractions for thirty-two elements.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2023)
Article
Chemistry, Analytical
Shanke Liu, Wenjun Li, Benxun Su, Bingyu Gao, Jing Wang, Changle Wang, Yang Luo, Lizhi Yan, Ye Zhao
Summary: This study presents a high-precision analytical method for lithium isotopic analysis using a modified chemical purification procedure and optimized instrumental setup. The method achieves a high precision of +/- 0.13 to 0.23 parts per thousand based on repeat measurements of Li standard and geological reference materials. Factors causing instrumental mass fractionations, such as Li concentration mismatch and the Na matrix effect, are also evaluated. The study reports the delta Li-7 values of eight international reference materials and introduces seventeen Chinese geological reference materials.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Astronomy & Astrophysics
Rui Chang, Honglei Lin, Wei Yang, Renhao Ruan, Xiaoying Liu, Heng-Ci Tian, Jiafei Xu
Summary: China's CE5 mission obtained lunar soil samples and in situ spectra, enabling comparison with laboratory analysis of the same sample. Reflectance spectra measurements of the CE5 soil and two size fractions (<45 and 45-355 μm) at various phase angles revealed that in situ photometric experiments are necessary for spectral exploration on the Moon. The <45-μm fraction showed closer scattering properties to the in situ spectral data, suggesting it may be more representative of pristine lunar soil.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Geochemistry & Geophysics
Yan Xiao, Meng Yuan, Ben-Xun Su, Chen Chen, Yang Bai, Shan Ke, Yang Sun, Paul T. Robinson
Summary: Fractional crystallization of Fe-Ti oxides during late-stage basalt differentiation can lead to detectable changes in Mg isotopes. The effect of chromite crystallization on Mg isotopic fractionation during early-stage basalt differentiation is poorly understood. This study examines the possibility of chromite-induced Mg isotope fractionation by analyzing chromite-olivine pairs in different types of basaltic intrusive rock suites formed by fractional crystallization. The results suggest that early crystallization of chromite can cause equilibrium Mg isotopic fractionation with olivine.
JOURNAL OF PETROLOGY
(2023)
Article
Geochemistry & Geophysics
Heng-Ci Tian, Wei Yang, Di Zhang, Huijuan Zhang, Lihui Jia, Shitou Wu, Yangting Lin, Xianhua Li, Fuyuan Wu
Summary: This study investigates the petrogenesis of Chang'E-5 young mare basalts by analyzing the chemical compositions of plagioclase. The results show large variations in major and trace element concentrations in plagioclase, indicating an extensive fractional crystallization process. The estimated melt compositions reveal a low-Ti and non-KREEP origin for the Chang'E-5 basalts.
AMERICAN MINERALOGIST
(2023)
Article
Geochemistry & Geophysics
Xiangli Wang, Jian-Ming Zhu, Guangliang Wu, Wenjing Liu, Cheng Lin, Wei Yang, Zhifang Xu, James R. Hein
Summary: Stable chromium isotope composition is widely used as a paleo-redox proxy, but its correlation with dissolved O2 concentrations in modern seawater suggests that non-O2 factors may affect marine Cr cycling. New δ53Cr data from hydrogenetic Fe-Mn crusts in the western and central-north Pacific Ocean suggest that trivalent Cr is the major species incorporated from seawater. The δ53Cr values of the crusts decrease from late Eocene to middle Miocene, followed by an increase to modern values, possibly influenced by primary productivity.
Article
Geochemistry & Geophysics
Zhen Wang, Robert Hill, Gordon Williams, Gary S. Dwyer, Jun Hu, Ewald Schnug, Roland Bol, Yajie Sun, Drew S. Coleman, Xiao-Ming Liu, Michael R. Sandstrom, Avner Vengosh
Summary: Phosphate rock contains important geological and environmental information. This study analyzes the lead isotopic compositions and trace element concentrations of global sedimentary and igneous phosphate rocks to evaluate their geological origin and potential for environmental tracing. The results show that sedimentary phosphate rocks have more radiogenic lead isotopes than igneous rocks, indicating different depositional environments. The lead isotopes and trace element proxies can be used to trace contamination from phosphate rock mining and fertilizer application. Overall, this study provides new data on the geochemistry of phosphate rocks and fertilizers, with implications for both geological and environmental research.
Article
Geochemistry & Geophysics
Wenshuai Li, Ryoichi Nakada, Yoshio Takahashi, Richard M. Gaschnig, Yongfeng Hu, Mohsen Shakouri, Roberta L. Rudnick, Xiao-Ming Liu
Summary: This study investigates the secular change in the geochemical composition of cerium in the upper continental crust (UCC) for tracing oxidative weathering. The results show that there are no distinguishable secular changes in the cerium anomaly and stable isotope composition of the average UCC. The study emphasizes the importance of utilizing the valence state of cerium as a reliable indicator of redox conditions.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Zi-Yi Ding, Shan-Ke Liu, Ben-Xun Su, Yang Bai, Qi-Qi Pan, Kwan-Nang Pang
Summary: Granitoids, a major component of the Earth's crust, exhibit significant variations in K isotopic composition. This study examined a suite of well-characterized crustal igneous rocks from the Tagong pluton and found a positive correlation between delta K-41 values and SiO2 and K2O contents, and a negative correlation with MgO and Al2O3 contents. Fractional crystallization of K-rich phases and the presence of mafic microgranular enclaves were identified as key factors contributing to K isotope heterogeneity in the crust.
Article
Geology
Yang Bai, Ben-Xun Su, Jing Wang, Xia Liu, Hong-Fu Zhang, Paul T. Robinson
Summary: This article reports the formation of Cr-bearing spinel through the interaction between alkali basaltic magma and fertile lherzolite. It is similar to the occurrence of concordant podiform chromitites in ophiolites and stratiform chromitites in layered intrusions. The significant difference is that the Cr-bearing spinel formed from the alkali basaltic melt-lherzolite interaction is extremely rich in Al.
ORE GEOLOGY REVIEWS
(2023)
Article
Spectroscopy
Yang Luo, Jing Wang, Yan Xiao, Wen-Jun Li, Shi-Ying Wang, Zi-Yi Ding, Yan-Hong Liu, Hong-Yu Zhang, Ben-Xun Su
Summary: In this study, a ilmenite megacryst sample was developed as a reference material for in situ element microanalysis. The analysis results showed that the ilmenite sample is homogeneous and can be used as a reliable reference material for microanalysis.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Biochemistry & Molecular Biology
Meng-Meng Cui, Frederic Moynier, Ben-Xun Su, Wei Dai, Yan Hu, Dimitri Rigoussen, Brandon Mahan, Marie Le Borgne
Summary: Potassium (K) is an essential electrolyte that plays a crucial role in cellular functions. This study investigates the natural distribution of stable K isotopes in different organs and red blood cells (RBCs) in mice and their potential use as biomarkers for diseases related to K+ homeostasis. The results show that different organs and RBCs have distinct K isotopic signatures, with RBCs showing heavy K isotopes enrichment and brains showing lighter compositions compared to livers and kidneys. The study suggests that K isotopic composition could be used as a biomarker for changes in K+ homeostasis and related diseases.
Article
Geology
Bai Yang, Su BenXun, Xiao Yan, Cui MengMeng, Wang Jing, Yuan QingHan
Summary: This study investigates the factors controlling the distribution of nickel (Ni) and cobalt (Co) contents in different rock series of the Stillwater Complex. It finds that in the Ultramafic Series, olivine has a Ni range of 2070 x 10(-6) to 3019 x 10(-6) and Co range of 105 x 10(-6) to 205 x 10(-6), while chromite has Ni contents of 434 x 10(-6) to 1843 x 10(-6) and Co contents of 221 x 10(-6) to 737 x 10(-6). The stratigraphic profile reveals that olivine from the Lowest Cyclic Unit has the highest Co content of 173x10(- 6) to 193 x 10(-6), while the G.H Cyclic Units have the lowest Co contents of 125x10(-6) to 141x10(-6).
ACTA PETROLOGICA SINICA
(2023)
Article
Geology
Su BenXun, Qin KeZhang, Jiang ShaoYong, Cao MingJian, Zhang ZhaoChong, Zhang HongLuo, Xue GuoQiang, Zhou TaoFa, Mo JiangPing
Summary: This study proposes that many Co.Ni deposits are composite deposits characterized by common features of multiple deposit types or multiple metal element assemblages. These deposits are important bridges that can link different deposit types, metallogenic theory, models for ore formation, and their exploration. The key scientific issue relevant to Co.Ni mineralization is the mechanism of coexistence and separation of Co and Ni in various processes. To construct a comprehensive Co.Ni metallogenic theory, studies on experimental petrology, numerical modeling, occurrence and enrichment of Co and Ni, as well as typical and composite deposits are required.
ACTA PETROLOGICA SINICA
(2023)
Article
Chemistry, Analytical
Rui-Ying Li, Jialong Hao, Wei Yang, Heng-Ci Tian, Sen Hu, Yangting Lin
Summary: Accurate Li isotope analysis of silicate glasses using SIMS is challenging due to the matrix effect. This study presents Li isotopic measurements on a set of silicate glasses and proposes a correction method to improve accuracy.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)