Article
Engineering, Civil
Hung-Chun Chao, Ju-Lien Pi, Chen-Feng You, Ying-Tzung Shieh, Hsueh-Yu Lu, Kuo-Fang Huang, Hou-Chun Liu, Chuan-Hsiung Chung
Summary: The Tatun Volcanic Group in northeast Taiwan is characterized by fumaroles and acid hot springs, indicating underlying magma activities. By combining regional geology, multi-isotopes, and volatiles, this study provided solid geochemical evidence for constraining the sources of chemicals in the hydrothermal system. Different types of water in the hot springs were identified, helping to distinguish between primary and secondary hydrothermal systems. The study also suggested a potential connection between the variations in volatiles and magma activities in the area.
JOURNAL OF HYDROLOGY
(2021)
Article
Geochemistry & Geophysics
Abdel Mawgoud Mohammed, Laura J. Crossey, Karl E. Karlstrom, R. V. Krishnamurthy, Alan E. Kehew, Thomas H. Darrah, Erica L. Emry
Summary: This study analyzes noble gas and stable isotope geochemical data from deep groundwater supply wells in the main oases of the Western Desert of Egypt, and reveals the presence of deep fluid inputs and geothermal heat in the Nubian aquifer. The findings highlight the complexity of fluid mixing and the challenges it poses for water resource management.
Article
Biochemistry & Molecular Biology
Houchao Xu, Jeroen S. S. Dickschat
Summary: This article presents a detailed investigation of the mechanism of geosmin synthase through isotopic labelling experiments. It reveals that the biosynthetic intermediate of geosmin is produced by the N-terminal domain and transferred to the C-terminal domain through release into the medium and uptake.
Article
Geochemistry & Geophysics
Kerry Schmidtbauer, Paula Noble, Michael Rosen, Daniel J. Conley, Patrick J. Frings
Summary: This study investigates the role of lake processes in determining the silicon isotope ratios of dissolved silicon and diatom biogenic silica in lakes. The research findings show species-specific fractionations of silicon isotopes in lakes, indicating the potential of using silicon isotopes as a paleolimnological proxy. Additionally, the study discusses the mass balance of silicon in lakes.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geochemistry & Geophysics
Andreas Pack, Eike-Matthias Bultmann, Michael Tatzel, Joachim Reitner
Summary: This study presents a laser fluorination technique for the measurement of triple silicon isotope ratios, which can provide valuable information on fractionation mechanisms and can be used as a proxy for seawater silicon isotopes. The high precision measurements of the triple silicon isotope ratios reveal the fractionation processes of silicon isotopes in various samples, including reference materials and sponge spicules.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geochemistry & Geophysics
Chunfei Chen, Stephen F. Foley, Sebastian Tappe, Huange Ren, Lanping Feng, Yongsheng Liu
Summary: The volatile components CO2 and H2O play a major role in mantle melting and heterogeneity. In this study, Ca isotopes were used to trace the lithological heterogeneity in alkaline magmatic rocks. The results revealed the presence of K-richterite and carbonate components as the source of alkaline magmas with low delta 44/40Ca values. These findings highlight the importance of Ca isotopes as a robust tracer of lithological variation caused by volatiles in the Earth's upper mantle.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Josh Wimpenny, Lars Borg, Corliss Kin Sio
Summary: This study presents new Ga isotope data from mare basalts and lunar highland rocks, revealing their isotopic heterogeneity on a larger scale compared to terrestrial magmatic rocks. The causes of this heterogeneity and its implications on the bulk δ71Ga value of the Moon are discussed. The study suggests that Ga isotopes are fractionated within the chemically evolving lunar magma ocean, and the crystallization of plagioclase may drive the observed isotopic fractionation in high-Ti mare basalts and KREEP-rich rocks.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Xiaoying Liu, Jialong Hao, Rui-Ying Li, Yuyang He, Heng-Ci Tian, Sen Hu, Jing Li, Lixin Gu, Wei Yang, Yangting Lin
Summary: The unusually prolonged volcanism at the Chang'e-5 landing site remains a mystery. In this study, in situ sulfur isotope analysis on sulfides of the CE-5 basalts was performed to understand the geochemical features of the mantle source. The analysis revealed a strong depletion of volatiles in the mantle source, possibly caused by prolonged magmatic activity.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Shui-Jiong Wang, Shi-Jie Li, Yangting Lin, Si-Zhang Sheng
Summary: We present high-precision mass-dependent nickel isotopic data for a comprehensive suite of achondrites and lunar rocks, providing insight into early planetary differentiation and Earth-Moon system formation. The primitive achondrites have high Ni contents and invariant Ni isotopic compositions, indicating incomplete core-mantle differentiation. Acid leaching experiments on aubrites reveal that sulfides are a significant host of light Ni isotopes. Late accretion and impact contamination can obscure the Ni isotope signature in achondrite records.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Chemistry, Organic
Anuj Kumar Chhalodia, Jan Rinkel, Dorota Konvalinkova, Joern Petersen, Jeroen S. Dickschat
Summary: The volatile compounds emitted by six marine Rhodobacteraceae species of the genus Celeribacter were investigated, revealing their capability of degrading methionine and DMSP into sulfur volatiles. However, caution must be taken when analyzing trace compounds in natural samples.
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Geochemistry & Geophysics
P. K. Sarath, K. R. Mangalaa, D. Cardinal, G. P. Gurumurthy, A. Dapoigny, V. V. S. S. Sarma, J. Riotte
Summary: This study presents the first investigation of silicon isotopic composition in river water from two contrasting basins in South India, showing the influence of seasonal changes and human activities on the isotopic signature.
Article
Geochemistry & Geophysics
Angus Fitzpayne, Andrea Giuliani, Nivea Magalhaes, Ashton Soltys, Marco L. Fiorentini, James Farquhar
Summary: Cretaceous kimberlites in southern Africa may contain deeply subducted material in their mantle sources, impacting their volatile budget. Through detailed study of sulfide petrography and S isotope geochemistry in fresh kimberlite rocks, a tool has been provided to investigate mantle chemical geodynamics over time.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Multidisciplinary Sciences
Romain Tartese, Paolo A. Sossi, Frederic Moynier
Summary: Rocks from the lunar interior are depleted in moderately volatile elements and enriched in their heavier isotopes compared to terrestrial rocks. This depletion and enrichment is attributed to various processes such as liquid-vapor exchange, incomplete accretion, and degassing during lunar magma ocean crystallization. Monte Carlo simulation suggests that the lunar MVE depletion is consistent with evaporative loss at specific conditions.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geochemistry & Geophysics
Margaret E. Hartley, Jan C. M. de Hoog, Oliver Shorttle
Summary: Trace elements and volatile heterogeneity in the Earth's mantle are affected by the recycling of oceanic lithosphere through subduction processes. Boron isotopes are utilized as a tracer for recycled subducted materials, showing the fate of these materials in the mantle and the composition heterogeneity in various tectonic settings. The new data suggest the presence of depleted and enriched mantle components intrinsic to the Icelandic mantle source, highlighting the role of recycled subducted lithosphere in melt generation at ocean islands.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Timo Hopp, Nicolas Dauphas, Fridolin Spitzer, Christoph Burkhardt, Thorsten Kleine
Summary: Nucleosynthetic Fe isotopic anomalies in meteorites provide insights into the early evolution of the solar system and the material that built terrestrial planets. Analysis of high-precision iron isotopic data shows a dichotomy between non-carbonaceous and carbonaceous iron meteorites, with the latter exhibiting excess Fe-54. Earth's mantle shares a similar Fe isotopic composition with CI chondrites, but differs significantly in other elements like Cr and Ni, indicating CI chondrites are unlikely to have contributed significant Fe to Earth.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Jia-Xin She, Edith Kubik, Weiqiang Li, Frederic Moynier
Summary: This study analyzed the Sn stable isotope compositions of 27 basalts from different geochemical and geological backgrounds in mid-ocean ridges to constrain the Sn isotope composition of the depleted mantle source. The study confirmed the limited Sn isotopic variability between fresh mid-ocean ridge basalts globally, suggesting the Sn isotopic homogeneity of the depleted mantle source.
Article
Geosciences, Multidisciplinary
Jing-Liang Guo, Zaicong Wang, Wen Zhang, Lanping Feng, Frederic Moynier, Zhaochu Hu, Lian Zhou, Yongsheng Liu
Summary: Zirconium is widely used to trace the differentiation of terrestrial planets and plays a crucial role in zircon, providing constraints on the history of the Earth. Stable Zr isotopes have shown potential in tracing magma differentiation and can reveal zircon crystallization kinetics and magma dynamics. Although the Zr isotope variability and fractionation mechanisms are complex, studies suggest that bulk-rock Zr isotopes can be used to trace the differentiation of felsic magmas. Integrated with other geochemical and isotopic tools, stable Zr isotopes may provide new insight into the dynamic history of diverse igneous systems through time.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geochemistry & Geophysics
Kun-Feng Qiu, Jun Deng, Crystal Laflamme, Zheng-Yu Long, Ruo-Qi Wan, Frederic Moynier, Hao-Cheng Yu, Jing-Yuan Zhang, Zheng-Jiang Ding, Richard Goldfarb
Summary: Orogenic gold deposits account for a significant portion of global gold resources, and determining their origin is crucial for prospecting new deposits. The Jiaodong gold province in China provides an opportunity to study the gold source due to its unique geological setting. By analyzing sulfur isotopes in pyrite grains from multiple gold deposits in the region, it was found that Archean metasedimentary rocks are not a source reservoir for sulfur and gold. Instead, the isotopically heavy S suggests a contribution from a subducted oceanic slab and its sediments. The release of gold and sulfur during subduction-related metamorphism played a crucial role in the formation of these giant orogenic gold deposits.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Zhaoxian Zhu, Wen Zhang, Jionghui Wang, Zaicong Wang, Jing-Liang Guo, J. Elis Hoffmann, Lanping Feng, Tao Luo, Zhaochu Hu, Yongsheng Liu, Frederic Moynier
Summary: This study investigates the zircon zirconium (Zr) isotope variations in a large granite batholith in the Jiaodong Peninsula, eastern North China Craton. It reveals that magmatic zircons can display different Zr isotopic compositions, which are likely controlled by magma differentiation during crystallization. The findings provide a fundamental framework for understanding zircon Zr isotopic evolution in the silicic igneous system and exploring open-system magmatic processes.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Wei Dai, Zaicong Wang, Zong-Feng Yang, Yongsheng Liu, Chunfei Chen, Lanping Feng, Lian Zhou, Ming Li, Wen Zhang, Frederic Moynier
Summary: Plagioclase crystallization is a common process in mafic magma evolution. The Ca isotopic fractionation of plagioclase from parental magmas is predicted to be limited, but natural samples show variable Ca isotopic variation, indicating the complexity of natural processes. By measuring the Ca isotopic composition of plagioclase phenocrysts and basaltic matrix in Emeishan basalts, the study confirms negligible equilibrium Ca isotope fractionation between plagioclase and basaltic melts, but significant Ca isotope variation caused by complex magma mixing and secondary fluid-induced disturbance.
Article
Astronomy & Astrophysics
Marine Paquet, Frederic Moynier, Tetsuya Yokoyama, Wei Dai, Yan Hu, Yoshinari Abe, Jerome Aleon, Conel M. O'D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Motoo Ito, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Izumi Nakai, Kazuhide Nagashima, David Nesvorny, Ann N. Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schoenbaechler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto
Summary: Initial analyses indicate that asteroid Ryugu has a composition similar to CI carbonaceous chondrites, which are the most primitive meteorites. However, further research is needed to establish the exact relationship. A recently conducted study reveals that Ryugu and CI chondrites share the same zinc and copper isotopic composition, suggesting a common genetic heritage between them. Additionally, the study suggests that Ryugu-like material might have contributed to Earth's budgets of certain elements.
Article
Geochemistry & Geophysics
Haoxuan Sun, Marc Chaussidon, Francois Robert, Shengyu Tian, Zhengbin Deng, Frederic Moynier
Summary: Cherts are commonly found in the Precambrian and have been used to reconstruct seawater paleo-temperatures based on their O and Si isotopic compositions. However, the reconstructions are hindered by the large isotopic heterogeneity of cherts at both bulk and micrometer scales, which is caused by the presence of silica precursors with different origins and modifications during diagenesis and metamorphism. To understand the processes controlling the Si isotopic composition of cherts, high-precision triple Si isotope measurements were conducted using MC-ICP-MS. The results show that three different sources of silica were involved in chert formation, and both equilibrium and kinetic isotopic fractionation occurred for Si.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
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
Geochemistry & Geophysics
Maxwell M. Thiemens, Robina Shaheen, Carina T. Gerritzen, Ildiko Gyollai, Kenneth Chong, Friedrich Popp, Christian Koeberl, Mark H. Thiemens, Frederic Moynier
Summary: The Snowball Earth events, which occurred during the late Neoproterozoic's Cryogenian period, involved complete or near-complete glaciation of Earth's surface. Isotopic systems such as Delta O-17 and barium isotopes have been used to reconstruct the paleoenvironment of these events. This study reports a multi-isotopic C, O, and Zn data set for carbonate deposits in northern Namibia after the Marinoan glaciation, revealing significant Zn isotopic variations. These variations suggest potential sources of Zn and provide insights into the conditions during carbonate formation.
MINERALOGY AND PETROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Biji Luo, Zaicong Wang, Jiale Song, Yuqi Qian, Qi He, Yiheng Li, James W. Head, Frederic Moynier, Long Xiao, Harry Becker, Bixuan Huang, Bing Ruan, Yangxuan Hu, Fabing Pan, Chang Xu, Wenlong Liu, Keqing Zong, Jiawei Zhao, Wen Zhang, Zhaochu Hu, Zhenbing She, Xiang Wu, Hongfei Zhang
Summary: The lunar basalt samples returned by the Chang'e-5 mission originated from an olivine-bearing pyroxenite mantle source. Through high-degree fractional crystallization, these magmas accumulated and evolved at the top of the lithospheric mantle before rapidly erupting onto the surface.
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
Ganglan Zhang, Yongsheng Liu, Rong Xu, Frederic Moynier, Yangtao Zhu, Huange Ren, Xin Jiang, Ming Li
Summary: Recycling of upper crustal sediments through slab subduction contributes to lithospheric refertilization and heterogeneity. However, the nature of recycled upper crustal components is unclear and direct evidence for sediment melt activity in the lithosphere is lacking. This study uses geochemical analyses to examine the relationship between clinopyroxenites and a glassy xenolith from the North China Craton, providing direct evidence for the activity of sediment melt with upper continental crust components in the lithosphere.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Chemistry, Multidisciplinary
Toshiyuki Fujii, Chizu Kato, Naoya Wada, Akihiro Uehara, Paolo Sossi, Frederic Moynier
Summary: The application of stable isotopes of vanadium (V) to trace geological and biological processes is a growing field. Vanadium can exist in different forms and can be used to trace its exchange between phases. Theoretical calculations and laboratory experiments were conducted to understand the isotope fractionation of vanadium in organic and aqueous phases. The results showed that the theoretical calculations matched well with the experimental data, providing a basis for interpreting natural variations of vanadium isotopes.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Geochemistry & Geophysics
Germain Bayon, Pierre Giresse, Hongjin Chen, Marie-Laure Rouget, Bleuenn Gueguen, Gabriel Ribeiro Moizinho, Jean-Alix Barrat, Daniel Beaufort
Summary: In this study, the behavior of rare earth elements (REEs) during the formation of glauconite in the West African continental shelf was investigated. The results show that kaolinite dissolution and subsequent Fe-bearing clay authigenesis contribute as a net source of REEs to seawater. It was also found that glauconitization results in the decoupling of the REE and the release of a dissolved REE fraction characterized by seawater-like distribution patterns.