Article
Geochemistry & Geophysics
Anne K. C. Kaufmann, Thomas Pettke, Martin Wille
Summary: The study focuses on the comprehensive dataset documenting the late stage magmatic-hydrothermal evolution of Mo isotope systematics in miarolitic cavities and their host granite from the Torres del Paine laccolith in Chile. Mo isotopic compositions were measured for different types of samples, showing variability in delta 98MoSRM3134 values. The Mo isotopic signature of magmatic fluids and hydrothermal minerals coexisting in the sampled cavities exhibit significant isotopic differences, providing insights into the fractionation processes during magmatic-hydrothermal stages at elevated temperatures.
Article
Geochemistry & Geophysics
Tian-Yi Huang, Fang-Zhen Teng, Ze-Zhou Wang, Yong-Sheng He, Zhi-Chao Liu, Fu-Yuan Wu
Summary: To understand the behavior of K isotopes during granitic magmatic differentiation, high-precision K isotope data for bulk granitoids and their K-bearing minerals from the Dabie and Himalayan orogens in China were analyzed. The study found significant variations in K isotopic compositions among different minerals, indicating compositional control on isotope fractionations. The research suggests that K isotopes can be a potential tool for studying the differentiation of felsic magmas.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Yan Hu, Fang-Zhen Teng, Rosalind T. Helz, Catherine Chauvel
Summary: Stable potassium isotopes are being used as tracers for terrestrial recycling and planetary processes. This study investigated K isotope fractionation during the differentiation and solidification of the Kilauea Iki lava lake in Hawaii, and found no analytically resolvable fractionation, indicating a lack of K-rich minerals in the crystallizing assemblage. The results suggest an average delta K-41 of -0.42 +/- 0.08 parts per thousand for the pristine mantle and of -0.42 +/- 0.07 parts per thousand for the BSE.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Hairuo Fu, Stein B. Jacobsen, Bjorn T. Larsen, Zachary T. Eriksen
Summary: Significant calcium isotope fractionation occurs during magmatic processes, particularly in felsic magma due to the influence of feldspar. This finding supports the use of calcium isotopes as a tracer for crustal evolution.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Toby J. Boocock, Sami Mikhail, Adrian J. Boyce, Julie Prytulak, Paul S. Savage, Eva E. Stueken
Summary: Geochemical analyses of igneous rocks from the Hekla volcanic system in Iceland suggest that the formation of continental crust has trapped significant amounts of magmatic nitrogen over Earth's history. Identifying the sources of crustal nitrogen is important for accurately reconstructing Earth's atmospheric pressure and habitability over geologic timescales. The findings indicate that nitrogen in the continental crust is of magmatic origin and suggest that the degassing of nitrogen from Earth's interior to the atmosphere may have been previously overestimated.
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
Biochemistry & Molecular Biology
Olivia Guillin, Emmanuelle Albalat, Caroline Vindry, Elisabeth Errazuriz-Cerda, Theophile Ohlmann, Vincent Balter, Laurent Chavatte
Summary: This study investigated the impact of HIV-1 virus production on cellular zinc homeostasis and isotopic fractionation. The researchers found that HIV-1 captures a significant amount of cellular zinc in newly produced particles, and cells accumulate lighter zinc isotopes from the growth medium. The viruses and producing cells exhibit similar isotopic fractionation. The study also demonstrated that enriched isotopes can be used to trace the fate of zinc in HIV-1 infected cells.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
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
Geochemistry & Geophysics
Jie-Hua Yang, Heng Chen, Mei-Fu Zhou, Rui-Zhong Hu, Anthony E. Williams-Jones
Summary: The Xihuashan and Yaogangxian granitic plutons in South China consist of highly evolved, multiphase, Li-rich granites and host quartz-vein-type tungsten deposits. The Li isotopic compositions in the granite phases of both plutons are influenced by the chemical evolution of the magmas, as indicated by correlations with SiO2 and Li concentrations, as well as Rb/Sr, Nb/Ta, and Zr/Hf ratios. The lithium isotope behavior observed in this study provides new insights into magmatic differentiation and associated rare-metal mineralization.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geochemistry & Geophysics
Lie -Meng Chen, Peter C. Lightfoot, Jian-Ming Zhu, Fang-Zhen Teng, Qing Duan, Runsheng Yin, Guangliang Wu, Song-Yue Yu, Rui-Zhong Hu
Summary: Sulfide-silicate liquid immiscibility is important in planetary-scale differentiation, crust formation, and genesis of magmatic sulfide ore deposits. Nickel isotope ratios can provide a hallmark of fractionation processes in magmatic systems. High-precision Ni isotope ratio data from Siberian Trap basalts reveal extensive Ni isotope fractionation due to sulfide saturation of the silicate magma. The results fit a Rayleigh fractionation model and give a precise estimate of the fractionation factor between sulfide liquid and silicate melt.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
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
Environmental Sciences
Katerina Rodiouchkina, Ilia Rodushkin, Steven Goderis, Frank Vanhaecke
Summary: Determination of element concentrations and isotope ratios in hair and nails is becoming more popular due to their easy sampling, transport, storage, and access to time-resolved information. However, progress in this area is limited by complicated and time-consuming analytical procedures and challenges in accuracy assessment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Environmental Sciences
Kaj V. Sullivan, James A. Kidder, Tassiane P. Junqueira, Frank Vanhaecke, Matthew I. Leybourne
Summary: Copper isotopic analysis plays a crucial role in studying geochemical and biological processes, providing detailed information that cannot be obtained with copper concentrations alone. It can be used as a vector in mineral exploration, tracer of metal contaminants in the environment, biomonitor, and diagnostic marker of diseases.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biochemical Research Methods
Hai-Ou Gu, He Sun, Chao Huang, Fangyue Wang, Can Ge
Summary: The study developed a Continuous-Acquisition-Method (CAM) MC-ICP-MS Run mode to improve stability when determining K isotopes. Experiments showed that the CAM Run mode provided higher stability and better precision compared to the traditional Sequence Run mode, making it suitable for high-precision K isotope measurements.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2021)
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
Geochemistry & Geophysics
Ruslan A. Mendybaev, Michiru Kamibayashi, Fang-Zhen Teng, Paul S. Savage, R. Bastian Georg, Frank M. Richter, Shogo Tachibana
Summary: Experimental results show that the evaporation rates and isotopic fractionation factors of magnesium and silicon remain consistent under vacuum and low-pressure hydrogen gas conditions. This suggests that the existing vacuum evaporation experimental database can be used to model evaporation under solar nebula conditions.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Yun Jiang, Piers Koefoed, Olga Pravdivtseva, Heng Chen, Chun-Hui Li, Fang Huang, Li-Ping Qin, Jia Liu, Kun Wang
Summary: The potassium isotopes can be used to distinguish primary and secondary processes in the solar nebula. Components in Allende carbonaceous chondrite, such as CAIs and chondrules, exhibit different K2O content and K isotope compositions, indicating alkali enrichment during metasomatism and aqueous processing. Most components in Allende have undergone aqueous alteration, as shown by their K isotopic compositions.
METEORITICS & PLANETARY SCIENCE
(2021)
Article
Geochemistry & Geophysics
Frederic Moynier, Yan Hu, Kun Wang, Ye Zhao, Yvan Gerard, Zhengbin Deng, Julien Moureau, Weiqiang Li, Justin I. Simon, Fang-Zhen Teng
Summary: The Nu SapphireTM MC-ICP-MS is a high-precision instrument for measuring potassium isotopes, effectively addressing major isobaric interferences and providing high potassium sensitivity. The precision and accuracy of potassium isotopic data are influenced by several parameters, including total potassium concentration, matching of potassium intensities between sample and standard, and the presence of matrix elements.
Article
Geochemistry & Geophysics
Camille Delvigne, Abel Guihou, Jan A. Schuessler, Paul Savage, Franck Poitrasson, Sebastian Fischer, Jade E. Hatton, Katharine R. Hendry, Germain Bayon, Emmanuel Ponzevera, Bastian Georg, Alisson Akerman, Oleg S. Pokrovsky, Jean-Dominique Meunier, Pierre Deschamps, Isabelle Basile-Doelsch
Summary: The use of silicon isotopes has led to significant advancements in understanding silicon cycling in various environments. This inter-laboratory comparison exercise provided soil and plant reference materials with organic material, resulting in excellent agreement among seven laboratories using different analytical setups. The data obtained will serve as valuable resources for future research on silicon isotopes.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Natalya A. Zavina-James, Aubrey L. Zerkle, Robert C. J. Steele, Matthew R. Warke, Gareth Izon, Paul S. Savage
Summary: The rise of oxygenic photosynthesis is considered the most important evolutionary step in Earth's history, but recent studies suggest that biological feedbacks also heavily influenced Earth's pre-oxidative atmosphere. Copper isotopes in Late Archaean rocks can potentially serve as biomarkers, providing valuable insights into the evolution of aerobic methane oxidation.
PRECAMBRIAN RESEARCH
(2021)
Article
Geochemistry & Geophysics
Mason Neuman, Astrid Holzheid, Katharina Lodders, Bruce Fegley, Bradley L. Jolliff, Piers Koefoed, Heng Chen, Kun Wang
Summary: The study conducted twenty heating experiments to investigate the behavior of K, Cu, and Zn evaporation and isotopic fractionation from basaltic melts at high temperatures. Results show that Zn is the most volatile element followed by Cu and K. However, partitioning of Zn into spinel layers affects the Zn isotope fractionation factor. Higher temperatures and lower oxygen fugacities promote evaporation, and the experimentally determined fractionation factors for K and Cu are significantly larger than the apparent observed fractionation factors from lunar basalts.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
W. Wilson Kuhnel, Stein B. Jacobsen, Yonghui Li, Yaray Ku, Michail Petaev, Shichun Huang, Zhongqing Wu, Kun Wang
Summary: Recent high-precision potassium isotopic analysis revealed significant inter-mineral K isotope fractionation in mineral separates from three well-preserved igneous rocks, as well as smaller but measurable fractionation between mineral-melt K isotopes. The results suggest isotopic disequilibrium due to kinetic processes and larger fractionations than calculated, indicating the potential impact on K-Ar and 40Ar-39Ar dating precision. Additionally, modeling of K isotopic fractionation during the formation of lunar anorthositic crust showed negligible effect on the K isotopic compositions, challenging the idea that the K isotopic difference between the Earth and the Moon is solely due to lunar magma ocean differentiation.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Spectroscopy
Yu Liu, Xian-Hua Li, Paul S. Savage, Guo-Qiang Tang, Qiu-Li Li, Hui-Min Yu, Fang Huang
Summary: This study reports on the Si isotope compositions of four potential reference materials for in-situ Si isotopic microanalysis. The results show that these materials are more homogeneous in Si isotopes compared to the commonly used quartz standard. The study also suggests that synthetic quartz glass can be used as an alternative, more homogeneous standard.
ATOMIC SPECTROSCOPY
(2022)
Article
Geochemistry & Geophysics
Madeleine E. Murphy, Paul S. Savage, Nicholas J. Gardiner, Anthony R. Prave, Richard M. Gaschnig, Roberta L. Rudnick
Summary: By analyzing the silicon isotope composition of glacial diamictites from different geological ages, researchers have established the long-term secular record of the compositional evolution of upper continental crust. The study shows that the variability of silicon isotopes in diamictites decreases over time, indicating the diminishing importance of glacially milled banded iron formation and tonalite-trondhjemite-granodiorites in post-Archaean continental crust. The research also suggests that the upper continental crust becomes increasingly homogeneous through atmospheric oxygenation and crustal reworking.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Astronomy & Astrophysics
Paul S. Savage, Frederic Moynier, Maud Boyet
Summary: The source and timing of delivery of volatile elements to Earth are crucial for understanding the planet's evolution. Recent research suggests that primitive meteorites have provided insights into the isotopic anomalies of zinc from the terrestrial reservoir. The study shows that carbonaceous chondrites from the outer Solar System have distinct characteristics compared to other meteorites, and Earth falls in between these two components. Modeling based on these findings indicates that around 30% of Earth's zinc budget is derived from a small percentage of carbonaceous chondrite-like materials, with the remaining coming from other meteorites.
Article
Geochemistry & Geophysics
R. C. Greenwood, R. Findlay, R. Martins, R. C. J. Steele, K. M. M. Shaw, E. Morton, P. S. Savage, M. E. Murphy, M. Rehkamper, I. A. Franchi, T. Elliott, M. D. Suttle, A. J. King, M. Anand, J. Malley, K. T. Howard, X. Zhao, D. Johnson, M. -C. Liu, K. A. McCain, N. R. Stephen
Summary: In this study, whole rock isotopic measurements of O, Cd, Cr, Si, Te, Ti, and Zn were conducted on the Winchcombe CM2 meteorite. The results showed that the isotopic compositions of Winchcombe are consistent with published data for CM2s, indicating their correlation. Oxygen isotope analysis demonstrated extensive aqueous alteration in Winchcombe's parent body, supporting the hypothesis that the snow line is significant in planetesimal accretion.
METEORITICS & PLANETARY SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Toby J. Boocock, Sami Mikhail, Adrian J. Boyce, Julie Prytulak, Paul S. Savage, Eva E. Stueken
Summary: Geochemical analyses of igneous rocks from the Hekla volcanic system in Iceland suggest that the formation of continental crust has trapped significant amounts of magmatic nitrogen over Earth's history. Identifying the sources of crustal nitrogen is important for accurately reconstructing Earth's atmospheric pressure and habitability over geologic timescales. The findings indicate that nitrogen in the continental crust is of magmatic origin and suggest that the degassing of nitrogen from Earth's interior to the atmosphere may have been previously overestimated.
Article
Multidisciplinary Sciences
Wriju Chowdhury, Dustin Trail, Martha Miller, Paul Savage
Summary: Constraining the lithological diversity and tectonics of the earliest Earth is critical to understanding our planet's evolution. By analyzing the composition of Jack Hills zircon (3.7 - 4.2 Ga), we found that the parent melts of these zircons were influenced by the assimilation of terrigenous sediments, serpentinites, cherts, and silicified basalts, followed by igneous differentiation, leading to the formation of intermediate to felsic melts in the early Earth. Trace element measurements also show that the formational regime had an arc-like chemistry, implying the presence of mobile-lid tectonics in the Hadean. These findings indicate a lithologically diverse and chemically similar formational regime for Jack Hills zircons, depicting complicated geodynamics of the early Earth, which contradicts the currently proposed stagnant-lid model.
NATURE COMMUNICATIONS
(2023)
Article
Geochemistry & Geophysics
Stephen J. Turner, Mattison H. Barickman, Julian Rodriguez, David A. Fike, Clive M. Jones, Kun Wang, Ivan P. Savov, Samuele Agostini, Michael J. Krawczynski, Rita Parai
Summary: The geochemistry of arc magmas provides insight into the chemical outfluxes from subducting slabs. Boron (B) abundances and isotope ratios act as tracers of slab-derived components, with new measurements in Nicaraguan volcanic centers indicating a B-rich slab component primarily sourced from subducted altered oceanic crust (AOC) and minor input from subducted sediments. This finding suggests that the volatile element budget delivered to the volcanic arc is mostly derived from the ocean crust and that volatiles may be recycled into the deeper mantle beneath Central America.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Kun Wang, Dmitri A. Ionov
Summary: Subduction plays a major role in recycling water, volatiles, and incompatible elements into Earth's mantle, and the isotopic signatures of potassium (K) can be used as a new tracer in subduction events. A study on mantle harzburgite xenoliths from Avacha volcano in Kamchatka, Russia, shows that slab-derived fluids infiltrated the sub-arc mantle and can significantly fractionate K isotopes. This provides direct evidence for the impact of subduction dehydration and fluid percolation on K isotopes in the mantle lithosphere.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Zhen-Min Ge, Xiao-Long Huang, Wei Xie, Tobias W. Hofig, Fan Yang, Yang Yu, S. Khogenkumar Singh
Summary: The mantle source composition of the nascent oceanic crust in the central part of the Gulf of California has been investigated using basaltic glass samples. These samples show trace element patterns similar to enriched mid-ocean ridge basalts, suggesting that the nascent oceanic crust in the Guaymas Basin might be generated through partial melting of a depleted mantle source metasomatized by subducted slab materials.
Article
Geochemistry & Geophysics
Jean-Michel Brazier, Katja E. Goetschl, Martin Dietzel, Vasileios Mavromatis
Summary: This study estimated the distribution coefficient of Zn2+ between calcite/aragonite and reactive fluids and found that the growth rate strongly influences D-Zn(2+) in both minerals. Additionally, a linear correlation was found between D-Zn(2+) and the saturation degree of the reactive fluid.
Article
Geochemistry & Geophysics
Ming Lei, Michele Lustrino, Jifeng Xu, Zhiqiang Kang, Zhengfu Guo, Jianlin Chen
Summary: This study presents a comprehensive geochronological, mineralogical, and geochemical analysis of olivine leucitites in the Maiga area of southern Tibet, suggesting that these rocks originate from a carbonated peridotite mantle source and highlighting the possibility of carbonates being recycled deep into the mantle during continental subduction.
Article
Geochemistry & Geophysics
Yuntao Ye, Xiaomei Wang, Huajian Wang, Haifeng Fan, Zhigang Chen, Qingjun Guo, Ziteng Wang, Chaodong Wu, Donald E. Canfield, Shuichang Zhang
Summary: Phosphorus is an essential element for life and its cycle in the ocean is closely connected with the carbon and oxygen cycles. The study of phosphate oxygen isotopes can provide insights into various reactions related to phosphorus. By analyzing carbonate fluorapatite samples from the Mesoproterozoic Era in North China, it was found that the oxygen isotope values were lower compared to modern samples, indicating a warmer climate during that time period and a potential reason for the scarcity of phosphorite.
Article
Geochemistry & Geophysics
Vincent Busigny, Oanez Lebeau, Didier Jezeduel, Carine Chaduteau, Sean Crowe, Magali Ader
Summary: This study conducted high-precision Mo isotope research on hydrothermal metal sulfides from a porphyry copper deposit in Southwest China and found that different stages of mineralization have distinct Mo isotope compositions, providing valuable insights into the behavior of Mo isotopes in magmatic-hydrothermal systems.
Article
Geochemistry & Geophysics
Min Ji, Xiao-Ying Gao, Yong-Fei Zheng, Bing Gong
Summary: The study examines the anatectic mechanisms in the Himalayan orogen, finding that pressure and temperature control the reaction, while water content mainly affects the solid-phase composition. Dehydration and hydration melting likely occur at different depths in the crust. This research provides important insights into the melting processes in collisional orogens.
