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Geochemistry & Geophysics
Zhen-Xin Li, Shao-Bing Zhang, Yong-Fei Zheng, Shi-Tou Wu, Wan-Cai Li, Fang-Yuan Sun, Ting Liang
Summary: A field-based geochemical study of amphibolites with unique geochemical characteristics reveals the significant role of fluorine in hydrothermal fluids in terms of element mobilization and fractionation.
Article
Geochemistry & Geophysics
Benedict J. R. Harris, Jan C. M. De Hoog, Ralf Halama, Hans-Peter Schertl, Yi-Xiang Chen
Summary: This study investigates the sources and timing of fluid infiltration in the whiteschists from the Dora-Maira massif in the Western Alps. It utilizes boron isotopes and other fluid-mobile trace elements in phengite to understand the metasomatic fluid influx. The results suggest that a B-rich sediment-derived fluid is the main source of B in the whiteschists, while the source of the Mg-rich fluids cannot be determined. This study demonstrates the usefulness of in situ analyses in unraveling complex fluid-rock interaction histories.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Geochemistry & Geophysics
Jia-Wei Xiong, Yi-Xiang Chen, Kun Zhou, Hans-Peter Schertl, Yong-Fei Zheng, Fang Huang, Xiao-Ping Xia, Zhen-Wu Chen
Summary: The study indicates that jadeite quartzite is derived from coesite-bearing whiteschist and possibly formed through metasomatism of metagranite by fluids derived from the host whiteschist under ultra-high pressure metamorphic conditions. The composition and isotopic characteristics of the jadeite quartzite suggest it was formed by external fluids interacting with the granites through metasomatism.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Stefania Corvo, Matteo Maino, Sandra Piazolo, Andrew R. C. Kylander-Clark, Andrea Orlando, Silvio Seno, Antonio Langone
Summary: In this study, the reliability of titanite U-Pb dating in determining the age of deformation in mylonitic rocks is explored through the relationships between titanite-hosting microdomains, intragrain chemical variations, microstructure, and fluids. The research is conducted in a post-Variscan shear zone in the mid-low continental crust of the Ivrea-Verbano Zone in the Southern Alps, Italy. The results indicate that microstructurally and chemically calibrated U-Pb dating of titanite can provide realistic ages of shear zone activity when crystal-plastic processes and local interaction of titanite with small amounts of fluids along grain boundaries predominate.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Martin Kubes, Jaromir Leichmann, Vojtech Wertich, Juraj Mozola, Marketa Hola, Viktor Kanicky, Radek Skoda
Summary: The study of main HFSE-bearing phases in highly evolved miaskitic syenites revealed that zircon has undergone radiation damage and fluid-driven alteration, with HFSE remobilization controlled by oxidized aqueous solutions. In addition, titanite released significant REE during interaction with hydrothermal fluids, while the dissolution of zircon and titanite under alkaline conditions suggests HFSE and REE remobilization was controlled by potassium-dominated complexes.
Article
Chemistry, Multidisciplinary
Christian Scheurer, Rafael E. Hincapie, Elisabeth Neubauer, Astrid Metz, Daniel Ness
Summary: The interaction between silica nanostructured particles and sandstone rock was investigated using various experimental approaches. The highest adsorption was observed in brine with high ionic strength, and the addition of alkali reduced adsorption. Berea rock crushed material showed slightly higher adsorption compared to Keuper rock, and temperature had a minor effect on adsorption behavior. In core-flood experiments, there was no effect on permeability. The nanoparticles showed a delayed breakthrough compared to the tracer, with larger particles passing through the rock core faster. SEM images suggested that adsorption spots were defined by surface roughness rather than mineral type.
Article
Geochemistry & Geophysics
Ewa Slaby, Robert Anczkiewicz, Katarzyna Gros, Klaus Simon, Gabriela A. Kozub-Budzyn, Lukasz Birski, Herve Martin, Mudlappa Jayananda, Jean-Francois Moyen, Milena Matyszczak, Marta Koziarska, Ewa Deput
Summary: This study aims to determine the composition and age of high-temperature hydrothermal fluids in Closepet granites in India. By analyzing titanite geochemistry and dating its domains, the study reveals the timing of fluid activity and its impact on the mineral. The results show distinct trace element enrichments or depletions in different titanite domains, suggesting interactions between fluid and crystal.
Article
Geochemistry & Geophysics
Masaki Enami, Yuki Wakasugi, Motohiro Tsuboi
Summary: In the Sanbagawa metamorphic belt, the semi-pelitic band has compositions intermediate between the basic and pelitic bands, with peak metamorphic conditions estimated at 1.0-1.2 GPa/600-630 degrees C.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2021)
Article
Geochemistry & Geophysics
Yuxiang Zhu, Lianxun Wang, Changqian Ma, Michael Wiedenbeck, Zhenbing She
Summary: This study investigates the mineralization history of Nb in the Fangcheng Nb deposit in central China using titanite as a tracer for magmatic and hydrothermal processes. Three types of titanite with different origins are distinguished. The hydrothermal titanites show higher Nb contents and lower εNd(t) values compared to the magmatic titanite. The results suggest two discrete episodes of Nb mineralization events in Fangcheng.
Article
Energy & Fuels
Jacquelin E. Cobos, Erik G. Sogaard
Summary: This study used Isothermal Titration Calorimetry to isolate fluid-fluid and rock-fluid interactions in low salinity water flooding in carbonates, revealing that the observed endothermic response is due to the formation of micro-dispersions, with Mg2+ being more active than Ca2+. Incorporation of certain ions onto the chalk lattice does not require external energy, while the energetically favorable incorporation of Mg2+ or Ca2+ into calcite is hindered by SO42- presence.
Article
Engineering, Geological
Mathilde Desrues, Jean-Philippe Malet, Ombeline Brenguier, Aurore Carrier, Alexandre Mathy, Lionel Lorier
Summary: This paper analyzes two large rock toppling/sliding events that occurred on the unstable slope of Cliets in the French Alps in January 2014 and February 2019. The study reveals that gravitational factors are predominant over triggering factors for these events, with a transition from toppling to sliding occurring before both failures.
Article
Chemistry, Analytical
Theophile Niyitanga, Haekyoung Kim
Summary: In this study, cobalt oxide and oxidized graphite composite catalyst was synthesized by a simple hydrothermal method for the oxygen evolution reaction. The optimal catalyst demonstrated the best catalytic performance with low overpotential and small Tafel slope, attributed to the presence of oxygen functional groups which induced a high electrochemical surface area, additional active site exposure, fast electron transfer, and enhanced dispersion of the catalyst.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Geochemistry & Geophysics
Stefania Corvo, Matteo Maino, Antonio Langone, Filippo Luca Schenker, Sandra Piazolo, Leonardo Casini, Silvio Seno
Summary: The study focuses on the geological samples from the Cima di Gagnone area in the Central Alps, revealing heterogeneous metamorphic conditions in rocks of different composition and rheology. The research results show that the metasediments generally experienced medium pressure and medium temperature conditions, but samples near ultramafic lenses recorded significantly higher conditions. Additionally, the study also identifies local melt/fluid interaction, as well as deformation-driven pressure and temperature variations within the rocks.
Article
Environmental Sciences
Marco Marcer, Alessandro Cicoira, Diego Cusicanqui, Xavier Bodin, Thomas Echelard, Renee Obregon, Philippe Schoeneich
Summary: Rock glaciers in the French Alps have shown significantly increased velocities since the 1990s, with about 5% of active rock glaciers exhibiting destabilisation. This pattern is correlated with rising air temperatures in the region, suggesting a role of warming climate in this process.
COMMUNICATIONS EARTH & ENVIRONMENT
(2021)
Article
Energy & Fuels
Rui Xu, Tie Yan, Xu Han, Jingyu Qu, Jinyu Feng
Summary: Studying the changes in reservoir physical properties and CO2 migration patterns is crucial for improving the effectiveness of CO2 flooding in low-permeability reservoirs.
Article
Geochemistry & Geophysics
Jane Selverstone, Zachary D. Sharp
EARTH AND PLANETARY SCIENCE LETTERS
(2015)
Article
Geosciences, Multidisciplinary
Gary J. Axen, Amy Luther, Jane Selverstone
Article
Geochemistry & Geophysics
Besim Dragovic, Leah M. Samanta, Ethan F. Baxter, Jane Selverstone
Article
Geochemistry & Geophysics
Jane Selverstone, Zachary D. Sharp
EARTH AND PLANETARY SCIENCE LETTERS
(2011)
Article
Geochemistry & Geophysics
J. Selverstone, Z. D. Sharp
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2013)
Article
Geochemistry & Geophysics
Z. D. Sharp, J. A. Mercer, R. H. Jones, A. J. Brearley, J. Selverstone, A. Bekker, T. Stachel
GEOCHIMICA ET COSMOCHIMICA ACTA
(2013)
Article
Geochemistry & Geophysics
Maria-Luce Frezzotti, Jan-Marten Huizenga, Roberto Compagnoni, Jane Selverstone
GEOCHIMICA ET COSMOCHIMICA ACTA
(2014)
Article
Geochemistry & Geophysics
Linda J. Chernak, Greg Hirth, Jane Selverstone, Jan Tullis
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2009)
Article
Geochemistry & Geophysics
Jane Selverstone, Gary J. Axen, Amy Luther
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2012)
Article
Geosciences, Multidisciplinary
Amy Luther, Gary Axen, Jane Selverstone
JOURNAL OF STRUCTURAL GEOLOGY
(2013)
Article
Geosciences, Multidisciplinary
M. L. Frezzotti, J. Selverstone, Z. D. Sharp, R. Compagnoni
Meeting Abstract
Geochemistry & Geophysics
B. Dragovic, L. Mehl, E. Baxter, J. Selverstone
GEOCHIMICA ET COSMOCHIMICA ACTA
(2010)
Article
Geochemistry & Geophysics
Frank J. Pazzaglia, Jane Selverstone, Mousumi Roy, Kurt Steffen, Sarah Newland-Pearce, Will Knipscher, Justin Pearce
Article
Geology
A. T. Hawkins, J. Selverstone, A. J. Brearley, R. J. Beane, R. A. Ketcham, W. D. Carlson
JOURNAL OF METAMORPHIC GEOLOGY
(2007)