Review
Geosciences, Multidisciplinary
Anna Barth, Terry Plank
Summary: This paper discusses the importance of water content in magmas beneath volcanoes for processes such as magma generation, viscosity, and buoyancy, as well as the methods and feasibility of recording water evolution in melt inclusions. It also proposes technical methods for identifying water loss and restoring the original water content.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Alexander A. Iveson, Madeleine C. S. Humphreys, Frances E. Jenner, Barbara E. Kunz, Ivan P. Savov, Jan C. M. De Hoog, Tatiana G. Churikova, Boris N. Gordeychik, Samantha J. Hammond, Pavel Yu Plechov, Jon Blundy, Samuele Agostini
Summary: This study investigates the magma generation and storage processes in the Tolbachik volcanic field, Russia, and explores the evolution of volatile phase and enrichment of chalcophile metals, particularly copper (Cu). The research reveals spatially variable magma storage conditions and different volatile contents and degassing histories for magmas feeding different monogenetic cones. The study also demonstrates that the Tolbachik volcanic field has a unique enrichment in Cu compared to other volcanoes in the region.
JOURNAL OF PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Li Zhang, Fangyue Wang, Huaiwei Ni
Summary: In this study, the anisotropic diffusion of copper in olivine was investigated. It was found that the diffusion rate of copper along the c axis is about 10 times greater than along the a axis. Although slower than the migration of hydrogen and interstitial lithium, copper diffusion in olivine is significantly faster than the major elements. The short timescale for copper re-equilibration in olivine-hosted melt inclusions indicates that copper concentrations may have been modified from their original values.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Yunhua Wu, Weibiao Hsu, Shiyong Liao, Zhiyong Xiao, Xiaochao Che, Lili Pan, Ye Li, Shaolin Li
Summary: NWA 13581 is a newly found gabbroic rock on Mars, providing important insights into the mantle sources and magmatic evolution of shergottites. It shares similar characteristics with other enriched shergottites, suggesting a common process in their mantle reservoir and during crystallization. The textural and mineralogical diversities of shergottites are largely related to crystallization at different crustal levels.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Sheng-Peng Wang, Zhong-Yuan Ren, Alexander R. L. Nichols, Tserendash Narantsetseg, Qing-Lin Zhang, Le Zhang, Chao Yuan
Summary: The Cenozoic basalts in eastern China are believed to be related to the mantle wedge beneath East Asia. However, the basalts in central and eastern Mongolia, which have similar characteristics, are located far from this mantle system. By analyzing the compositions of basalts, olivines, spinels, and olivine-hosted melt inclusions from Mongolia, researchers found high temperatures and thermal anomalies in the mantle sources feeding the volcanism. They propose a branched plume model to explain the similarity of geochemistry and eruption ages for basalts on both sides of the Daxinganlin-Taihangshan gravity lineament (DTGL).
Article
Geochemistry & Geophysics
Thomas Shea, Dawn Ruth, Michael Jollands, Kenta Ohtaki, Hope Ishii, John Bradley
Summary: This study investigates the effectiveness of diffusion chronometry in olivine through olivine-melt diffusion experiments and finds that the presence of melt affects the calculated timescales. Measured diffusivities in melt-bearing olivine are faster than those obtained in previous experiments, which may be due to the additional point defects at the interface.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Review
Astronomy & Astrophysics
Paul J. Wallace, Terry Plank, Robert J. Bodnar, Glenn A. Gaetani, Thomas Shea
Summary: Inclusions of silicate melt trapped inside crystals provide a detailed record of volcanic processes, but this record may be influenced by post-entrapment processes. They serve as a primary archive of dissolved gases in magma, which are crucial for causing volcanic eruptions.
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, VOL 49, 2021
(2021)
Article
Geology
J. Neukampf, B. S. Ellis, O. Laurent, L. K. Steinmann, T. Ubide, M. Oeser, T. Magna, S. Weyer, O. Bachmann
Summary: The study reveals that volatile degassing before volcanic eruptions occurs in a short period of tens of minutes, with rapid changes in lithium isotopic and elemental concentration profiles in plagioclase crystals. This new technique has the potential to improve the interpretation of volcanic monitoring signals and enhance the safety of people living near active volcanoes.
Article
Geology
Shiwen Li, Yabin Li, Junhao Guo, Zikun Zhou, Aihua Weng
Summary: The stability field of hydrous phases in subducting slabs and their thermal states regulate water transport in the mantle. It has been discovered that warm slabs can transport significant amounts of water into the upper mantle by rehydrating stishovite through percolation.
Article
Geochemistry & Geophysics
Benoit Welsch, Emily C. First, Philipp Ruprecht, Michael C. Jollands
Summary: Olivine plays a crucial role in the evolution of the Solar System and other planetary bodies, controlling magma evolution, mantle deformation, and capturing carbon dioxide during chemical weathering.
Article
Geology
Helena Albert, Teresa Trua, Jose Fonseca, Michael P. Marani, Fabiano Gamberi, Richard Spiess, Andrea Marzoli
Summary: The architecture and processes of mush-dominated plumbing systems in active volcanic areas play a crucial role in feeding eruptions and interpreting monitoring data. However, previous studies have not integrated data from different mush sectors, which hinders the understanding of pre-eruptive magmatic processes and the interpretation of monitoring signals during unrest periods. Studying eruptions in different locations on a volcano can provide a better comprehension of how mush-dominated plumbing systems work as a whole.
Article
Geochemistry & Geophysics
Jennifer Humphreys, Maryjo Brounce, Kristina Walowski
Summary: This study investigates the oxidation differences between arc basalts and mid-ocean ridge basalts, as well as the mechanisms through which arc basalts gain their elevated oxidative state. The findings suggest that Fe3+/Sigma Fe measurements may be influenced by the host magma and propose a possible explanation for this phenomenon.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Anastasiya Starikova, Ilya Prokopyev, Anna Doroshkevich, Alexey Ragozin, Vasily Chervyakovsky
Summary: Olivine from deep mantle-derived rocks carries crucial information about mantle source composition, metasomatism processes, silicate-carbonate melt origin, and rock composition/crystallization mechanisms. Analyzing olivine from carbonate-rich ultramafic rocks reveals different olivine sources and populations.
Article
Geochemistry & Geophysics
Michael C. Jollands, Joshua Muir, Jose Alberto Padron-Navarta, Sylvie Demouchy
Summary: The diffusivity of hydrogen in forsterite has been extensively studied, but there are still some puzzling observations. Different experiments measuring the same process have provided different results in terms of diffusion coefficients. The presence of various H-bearing point defects in forsterite suggests the involvement of inter-site reactions. Numerical models show that the true mobility of the M-site vacancy associated with 2H(+) is higher than previously determined, and density functional theory calculations provide good agreement with experimental results for 'clinohumite-type' defects but significant disagreement for defects involving trivalent cations. These findings indicate that simple diffusion alone is unlikely to explain the observed diffusion profiles.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Anne-Sophie Bouvier, Estelle F. Rose-Koga, Alexander R. L. Nichols, Clemence Le Lay
Summary: In this study, the oxygen isotope equilibrium between melt inclusions and their host olivines from arc samples was investigated for the first time. It was found that despite other major elements being in equilibrium, the majority of melt inclusions in the samples were not in isotopic equilibrium with their olivine hosts. This suggests that the melt inclusions are trapped in partly recrystallized olivines, highlighting the importance of magma mixing and crystal recycling in the magmatic plumbing system of these volcanoes.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Daniel A. Coulthard, Mark K. Reagan, Kenji Shimizu, Ilya N. Bindeman, Maryjo Brounce, Renat R. Almeev, Jeffrey Ryan, Timothy Chapman, John Shervais, Julian A. Pearce
Summary: The Expedition 352 to the Bonin forearc drilled the volcanic rocks sequence erupted during the immediate aftermath of subduction initiation. The collected volcanic glasses were analyzed for major and trace elements, halogens, sulfur, and H and O isotopes to characterize the fluids and melts involved in generating the new upper plate crust. The incompatible trace elements compositions of the oldest lavas are similar to the most depleted mid-ocean ridge basalts globally, indicating most lavas were generated by decompression melting in a near-trench environment.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geochemistry & Geophysics
John W. Shervais, Mark K. Reagan, Marguerite Godard, Julie Prytulak, Jeffrey G. Ryan, Julian A. Pearce, Renat R. Almeev, Hongyan Li, Emily Haugen, Timothy Chapman, Walter Kurz, Wendy R. Nelson, Daniel E. Heaton, Maria Kirchenbaur, Kenji Shimizu, Tetsuya Sakuyama, Scott K. Vetter, Yibing Li, Scott Whattam
Summary: The International Ocean Discovery Program Expedition 352 collected comprehensive data on over 800 meters of in situ oceanic crust comprising boninite and boninite-series lavas in the Izu-Bonin forearc. The lavas were categorized into high-silica boninite, low-silica boninite, and basaltic boninite based on their chemical compositions, with distinct axial and off-axis lava types identified through chemostratigraphic analysis. This study provides insights into the origins and petrogenesis of these unusual boninite lavas in the forearc setting.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geochemistry & Geophysics
Nikolai Nekrylov, Pavel Yu Plechov, Yulia D. Gritsenko, Maxim Portnyagin, Vasily D. Shcherbakov, Vasily A. Aydov, Dieter Garbe-Schoenberg
Summary: This paper presents the first high-precision analyses of olivine from 15 samples of magnesian skarns and silicate marbles from the Fersman Mineralogical Museum in Moscow, Russia. The olivine in these samples shows distinctive features of anomalously low contents of Co, Cr, and Ni, high content of B, and charge balancing with the incorporation of Li and Na. The study suggests REE incorporation into MSSM olivine could occur via charge-balanced coupled substitution with Na at low temperature and low alpha(SiO2) conditions during MSSM formation.
AMERICAN MINERALOGIST
(2021)
Editorial Material
Geochemistry & Geophysics
Chao Zhang, Xiaoyan Li, Renat R. Almeev, Ingo Horn, Harald Behrens, Francois Holtz
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geography, Physical
Polina Vakhrameeva, Andreas Koutsodendris, Sabine Wulf, Maxim Portnyagin, Oona Appelt, Thomas Ludwig, Mario Trieloff, Joerg Pross
Summary: This study analyzed tephra layers in the Eastern Mediterranean region to establish correlations between terrestrial and marine records, revealing multiple volcanic layers and providing important clues and rich data for the study of regional climate change.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geography, Physical
Vera Ponomareva, I. Florin Pendea, Egor Zelenin, Maxim Portnyagin, Natalia Gorbach, Maria Pevzner, Anastasia Plechova, Alexander Derkachev, Alexey Rogozin, Dieter Garbe-Schoenberg
Summary: This study presents the first continuous record of explosive volcanic activity in the Kamchatka region during the late Pleistocene, showing that large silicic explosive eruptions peaked at 30-25 ka, with later moderate activity from northern CKD volcanoes. The research also suggests the existence of a large lake system within the CKD for approximately 20 kyr until its final discharge around 12 ka BP.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Martin Danisik, Vera Ponomareva, Maxim Portnyagin, Sergey Popov, Andrei Zastrozhnov, Christopher L. Kirkland, Noreen J. Evans, Evgeny Konstantinov, Folkmar Hauff, Dieter Garbe-Schoenberg
Summary: Volcanic ash layers can serve as important time markers in the geological record for reconstructing paleoenvironmental, paleoclimatic, and paleogeographic conditions. This study provides geochronological and geochemical data for the Gorelka tephra, a significant marker for a major marine transgression in the Eastern Paratethys Sea during the Miocene. The eruption age of the Gorelka tephra has been constrained to 11.5 +/- 0.5 Ma, and its characteristics suggest a large-scale eruption from a volcanic source in the Transcarpathian region.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Antje Duerkefaelden, Joerg Geldmacher, Maxim Portnyagin, Dieter Garbe-Schoenberg, Reinhard Werner, Dietmar Mueller, Folkmar Hauff, Kaj Hoernle
Summary: Geochemical data and plate tectonic reconstructions support the formation of Shatsky Rise by a mantle plume, with the identification of two hotspot tracks—Papanin Ridge and Ojin Rise Seamounts verifying this hypothesis.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geochemistry & Geophysics
Rachel Bezard, Kaj Hoernle, Jorg A. Pfander, Brian Jicha, Reinhard Werner, Folkmar Hauff, Maxim Portnyagin, Blanka Sperner, Gene M. Yogodzinski, Simon Turner
Summary: By conducting extensive 40Ar/39Ar dating and geochemical analysis on 40 samples from the lower units of the Aleutian ridge, this study provides constraints on the timing of the Aleutian Arc initiation and its pre-Quaternary evolution. The results reveal three distinct periods of enhanced magmatic activity during the arc's evolution, with temporal changes in magma types corresponding to variations in arc crustal thickness beneath the active front.
Article
Geochemistry & Geophysics
Evelyn Furi, Maxim Portnyagin, Nikita Mironov, Cecile Deligny, Andrey Gurenko, Roman Botcharnikov, Francois Holtz
Summary: The study indicates that the arc magmas feeding the Klyuchevskoy volcano contain significant amounts of nitrogen and carbon dioxide derived from the subducting slab, which are partially returned to the crust and atmosphere through arc-related magmatism.
Article
Geochemistry & Geophysics
A. -S. Bouvier, M. V. Portnyagin, S. Flemetakis, K. Hoernle, S. Klemme, J. Berndt, N. L. Mironov, T. John
Summary: The isotopic composition of Cl can provide insights into element recycling processes in subduction zone settings. Measurements of Cl isotope ratios and trace element concentrations in melt inclusions from samples along the Central American Volcanic Arc reveal restricted ranges of delta Cl-37 values in certain regions and larger variations in others. Combining these measurements with existing knowledge about slab contributions, different endmembers in the subduction zone can be identified.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Artem Leichter, Renat R. Almeev, Dennis Wittich, Philipp Beckmann, Franz Rottensteiner, Francois Holtz, Monika Sester
Summary: This study presents an example of using machine learning to automatically characterize and interpret the characteristics of solid phases in thin sections. The focus is on olivine in volcanic rocks, with the aim of determining its magnesian number (mg#) and identifying different populations. The approach involves pre-processing, segmentation, and classification using deep learning, and establishing a functional relationship between backscattered electron (BSE) intensity and mg#. The high-resolution automatic characterization of mineral textures and compositions is demonstrated.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Multidisciplinary Sciences
David Karatson, Tamas Biro, Maxim Portnyagin, Balazs Kiss, Jean-Louis Paquette, Zoltan Cseri, Matyas Hencz, Karoly Nemeth, Pierre Lahitte, Emo Marton, Laszlo Kordos, Sandor Jozsa, Lilla Hably, Samuel Mueller, Imre Szarvas
Summary: The study of a volcanic eruption in the Pannonian Basin during the Miocene period reveals the interaction between the geosphere and biosphere. The volcanic ash covered the Ipolytarnoc Fossil Site, but the presence of uncharred tree trunks, branches, and intact leaves, as well as rock paleomagnetic properties, indicates that this was a low-temperature pyroclastic event that preserved the coastal habitat and unique fossil tracks.
SCIENTIFIC REPORTS
(2022)
Article
Geochemistry & Geophysics
Michele Cassetta, Gino Mariotto, Nicola Daldosso, Emanuele De Bona, Mattia Biesuz, Gian Domenico Soraru, Renat Almeev, Marco Zanatta, Francesco Vetere
Summary: In this study, we focused on the relationship between the bulk and shear moduli ratio and the melt fragility of parental glasses. By integrating data from different measurement methods, we were able to predict the viscosity of the Na2O-SiO2 system accurately during the liquid to glass transition.
Review
Geochemistry & Geophysics
Filippo Ridolfi, Renat R. Almeev, Alexey Yu Ozerov, Francois Holtz
Summary: This article presents the application of the Amp-TB2 protocol, based on detailed electron-microprobe analyses, in determining the physicochemical parameters of volcanic products erupted by the Bezymianny volcano. The protocol includes an equation to identify different zones within amphibole crystals and has been used to quantify pressure, temperature, volatile content, and oxygen fugacity. Results show that the Bezymianny volcano has a dynamic feeding system and the pre-eruptive depth of magma storage increases with the age of the investigated products.
Article
Geochemistry & Geophysics
Lingyu Zhang, Kristoffer Szilas
Summary: This study presents new petrological and geochemical data for the Narssaq Ultramafic Body (NUB) in the Itsaq Gneiss Complex of SW Greenland. The results indicate that the ultramafic rocks of NUB are not mantle residues, but instead represent crustal cumulates derived from high-Mg magmas.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Rong Xu, Sarah Lambart, Oliver Nebel, Ming Li, Zhongjie Bai, Junbo Zhang, Ganglan Zhang, Jianfeng Gao, Hong Zhong, Yongsheng Liu
Summary: This study investigated the iron isotope compositions of Cenozoic basalts in Southeast China, finding significant variations related to different types of basalts and their respective sources.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
C. J. Ebinger, Miriam C. Reiss, Ian Bastow, Mary M. Karanja
Summary: The East African rift system is formed above mantle upwellings and the formation of rifts is related to lithospheric thinning and magmatic activity. The amount of splitting varies spatially and the fast axes are predominantly parallel to the orientation of the rifts. Thick lithospheric modules have less splitting and different orientations, which may indicate mantle plume flow. Splitting rotates and increases in strength as it enters the rift zones, suggesting that the anisotropy is mainly present at shallow depths.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Correction
Geochemistry & Geophysics
Ekaterina Rojas-Kolomiets, Owen Jensen, Michael Bizimis, Gene Yogodzinski, Lukas Ackerman
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Robert W. Nicklas, Igor S. Puchtel, Ethan F. Baxter
Summary: Oxygen fugacity is a fundamental parameter for understanding redox processes in igneous systems. This study compares the Fe-XANES oxybarometry method with the V-in-olivine method for evaluating fO(2) in MORB lavas. The results show that the V-in-olivine method is not applicable to samples with low MgO content, and that the majority of Archean komatiite sources have lower fO(2) than modern MORB.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
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
Timothee Jautzy, Gilles Rixhon, Regis Braucher, Romain Delunel, Pierre G. Valla, Laurent Schmitt, Aster Team
Summary: Although the current approach to estimate catchment-wide denudation rates using only 10Be concentrations has made significant progress in geomorphology, this study argues for the inclusion of 26Al measurements and testing of steady-state assumptions in slow eroding, formerly glaciated landscapes. The study conducted measurements of both 10Be and 26Al in stream sediments from the Vosges Massif in France and found that elevation, slope, channel steepness, and precipitation were the primary factors controlling denudation rates. The study also revealed a significant relationship between the extent of past glaciation and the cosmogenic (un-)steadiness in the stream sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Erik van der Wiel, Douwe J. J. van Hinsbergen, Cedric Thieulot, Wim Spakman
Summary: Numerical models of Earth's mantle dynamics can predict the vigour and mixing of mantle flow, and the average slab sinking rates are an unexplored parameter that can provide intrinsic information on these characteristics. Through numerical experiments, it has been found that slab sinking rates are strongly correlated with mantle convection and mixing, and may explain geochemical observations from hotspot volcanoes.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)