Article
Environmental Sciences
Wouter Deleersnyder, David Dudal, Thomas Hermans
Summary: This paper proposes an appraisal tool for evaluating the inconsistency between the inversion model and multidimensional data, using a normalized gradient calculated based on multidimensional forward modeling. Additionally, an alternative approach is suggested to account for imperfect forward modeling with low computational cost. The method is demonstrated on an AEM survey, revealing potential problematic zones in the estimated fresh-saltwater interface.
Article
Materials Science, Multidisciplinary
Nestor J. Zaluzec
Summary: Aberration correction in the analytical transmission electron microscope has been closely associated with advancements in high-resolution imaging. This paper demonstrates that by combining this technology with new system designs that optimize electron optics and x-ray detection, performance has improved by more than tenfold over the past 25 years.
MICROSCOPY AND MICROANALYSIS
(2023)
Article
Chemistry, Physical
Naoki Hamao, Yuki Yamaguchi, Koichi Hamamoto
Summary: A dense garnet-type Li-ion conductor was successfully fabricated at low temperature, showing controlled thickness and high Li-ion conductivity. Additionally, a thin free-standing Li6.5La3Zr1.5Ta0.5O12 sheet was also produced using this method.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Environmental Sciences
Edward J. Harrison, Vikas C. Baranwal, Andreas A. Pfaffhuber, Craig W. Christensen, Guro H. Skurdal, Jan Steinar Ronning, Helgard Anschutz, Marco Bronner
Summary: This paper reviews the application of onshore AEM in Norway over the past decades, illustrating its utility through two detailed case studies. Despite the limited resolution of AEM systems, when combined with ground-based methods, site investigations can become more efficient. With new developments in drone-borne systems and increasing investment in AEM surveys, there is potential for continued global adoption of this technology.
Article
Chemistry, Physical
Narthana Kandhasamy, Gopal Ramalingam, Govindhasamy Murugadoss, Manavalan Rajesh Kumar, Gunasekaran Manibalan, Rajabathar JothiRamalingam, Hemraj M. Yadav
Summary: The study successfully synthesized highly uniform copper and zinc oxide anchored nanoparticles on the surface of silica using a sol-gel method. Detailed structural and compositional analyses were carried out using X-ray diffraction, X-ray photoelectron spectroscopy, Laser Raman, field emission scanning electron microscopy, and transmission electron microscopy. The charge-discharge results showed excellent performance in specific capacitance at high current densities for the composite materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Multidisciplinary Sciences
Qi Zhu, Zhiliang Pan, Zhiyu Zhao, Guang Cao, Langli Luo, Chaolun Ni, Hua Wei, Ze Zhang, Frederic Sansoz, Jiangwei Wang
Summary: This study reveals the dynamics of site-selective oxidation behavior in nanotwinned silver and palladium driven by individual stacking-faults and twin boundaries, providing an atomistic visualization of how planar defects influence complex reaction dynamics in metallic nanostructures. The findings shed light on the basic mechanisms at play in surface chemical reactions of nanomaterials, showcasing the potential for modifying physicochemical performances through defect engineering.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
K. Rubesova, V Jakes, O. Jankovsky, M. Lojka, D. Sedmidubsky
Summary: Two precursors were prepared using a solid state reaction and a sol-gel process, their phase evolution during a 4-step calcination process was observed, and final samples were sintered with either fast or slow cooling. The phase composition, microstructure, and thermoelectric characteristics of the final samples varied, with results showing that the thermoelectric properties depended on the precursors used.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Eric Formo, Jordan A. Hachtel, Yassamin Ghafouri, Matthew A. Bloodgood, Tina T. Salguero
Summary: In situ electron microscopy imaging and spectroscopy were used to study the evolution of quasi-1D NbS3-IV nanoribbons, revealing a dramatic transformation into textured configurations and aligned 2H-NbS2 sheets. Atomic resolution imaging and spectroscopy techniques confirmed the chemical changes, leading to a proposed atomistic mechanism for the conversion of NbS3-IV into 2H-NbS2.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yong Zhang, Huiteng Tan, Xun Cao, Ayan Bhowmik, Vincent Gill, Alexis Lambourne, Alex Qingyu Yan, Yizhong Huang
Summary: This study investigates the atomic-scale oxidation mechanism of Sm2Co17 magnets, revealing a two-stage oxidation process and the impact of anisotropic phase distribution on oxidation behavior. It also highlights the preferential oxygen diffusion pathways and non-uniform oxidation pattern in the magnets.
Article
Materials Science, Multidisciplinary
Tomoya Ohno, Jeevan Kumar Padarti, Yoshimasa Hayashi, Shigeto Hirai, Takeshi Matsuda, Takahiko Kawaguchi, Naonori Sakamoto, Naoki Wakiya, Takashi Arai, Hisao Suzuki
Summary: Cubic garnet-type Li ion conductor c-LLZTO was prepared through the metal alkoxide route with chemical modification, resulting in a dense c-LLZTO pellet with higher ion conductivity at 300 K.
Article
Geochemistry & Geophysics
Matthew S. Tarling, Steven A. F. Smith, Jeremy S. Rooney, Cecilia Viti, Keith C. Gordon
Summary: The study identifies a new type of mineralogically banded serpentine crack-seal vein, where thin bands of chrysotile are followed by thicker bands of polygonal serpentine/lizardite. This suggests a common set of processes involving crack opening and sealing in various structural sites within serpentinite-bearing faults and shear zones.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Materials Science, Ceramics
Rina R. Tikare, Rohit R. Powar, Sharadchandra S. Patil, Dhanaji G. Kanase
Summary: Mixed metal oxides with different iron content (x = 0.2-1.0) were synthesized using sol-gel auto combustion process. The properties of the oxide materials were characterized using various techniques. The results showed that the replacement of aluminium ions affected the structure, bandgap, and crystallite size of the mixed metal oxides. The iron-substituted aluminate gas sensors exhibited good performance in detecting gases such as CO, H2S, and NO2.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Ainur Zhussupbekova, Kuanysh Zhussupbekov, Ruggero Verre, David Caffrey, Kyle Shiel, Igor V. Shvets, Karsten Fleischer
Summary: Oxide semiconductors have the potential to surpass currently employed semiconductors, but the insufficient development of p-type oxides is a major obstacle. This study introduces an optical sensing method for monitoring oxide film growth during spray pyrolysis. By extracting the changes in refractive index in real time, the thermal decomposition processes can be understood and synthesis conditions can be optimized.
CHEMISTRY OF MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Yong Zhang, Xun Cao, Huiteng Tan, Vincent Gill, Alexis Lambourne, Alex Qingyu Yan, Yizhong Huang
Summary: This study investigates the decomposition process and structural changes of Sm2Co17-type permanent magnets during early-stage oxidation using aberration-corrected TEM. The findings provide insights into the initial oxidation behavior of alloys.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Govindhasamy Murugadoss, Manavalan Rajesh Kumar, Parasuraman Kuppusami
Summary: Cu2O-Cu(OH)(2) nanocomposite was successfully synthesized via a chemical precipitation method, showing promising visible-light photocatalytic activity for crystal violet degradation. The nanocomposite combines the advantages of Cu2O and Cu(OH)(2) nanoparticles, making it a durable and efficient catalyst under visible light irradiation.
Article
Geochemistry & Geophysics
Alexandre Cugerone, Benedicte Cenki-Tok, Manuel Munoz, Kalin Kouzmanov, Emilien Oliot, Vincent Motto-Ros, Elisabeth Le Goff
Summary: Rare metals like Ge and Ga play a key role in green technology development and are commonly found in base-metal mineral deposits. This study uses advanced analytical techniques to investigate the distribution and impact of rare metals in sphalerite, highlighting the enrichment of Ge and Ga in vein mineralization. The remobilization of these elements due to partial recrystallization in sphalerite is proposed to result in the formation of patchy-oscillatory zoning and Ge-rich accessory minerals.
MINERALIUM DEPOSITA
(2021)
Article
Geosciences, Multidisciplinary
Fang Huang, Samuel Barbier, Renbiao Tao, Jihua Hao, Pablo Garcia del Real, Steve Peuble, Andrew Merdith, Vladimir Leichnig, Jean-Philippe Perrillat, Kathy Fontaine, Peter Fox, Muriel Andreani, Isabelle Daniel
Summary: Serpentinization refers to the alteration of ultramafic rocks that produces serpentines and secondary (hydr)oxides under hydrothermal conditions. The process can generate H-2 and organic molecules, but there is significant variability in the experimental results. Building a comprehensive database is essential for better interpretation of data and identification of key parameters controlling the reactions.
GEOSCIENCE DATA JOURNAL
(2021)
Article
Geochemistry & Geophysics
A. Verlaguet, D. Bonnemains, C. Mevel, J. Escartin, M. Andreani, F. Bourdelle, M-C. Boiron, V. Chavagnac
Summary: The MAR 13 degrees 20 ' N corrugated detachment fault is uniquely composed of mafic cataclastic breccias instead of ultramafics and gabbros, as found in other detachments. The presence of silica-iron-rich fluids, phase separation, and heterogeneous fluid circulation suggest a complex fluid evolution in this region. Seawater infiltration, silica-rich fluid upflow, and interaction with mafic rocks contribute to intense quartz mineralization.Present-day venting at the detachment footwall, such as Irinovskoe, is most likely driven by fluid circulation within the footwall, not along the detachment.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Review
Geosciences, Multidisciplinary
Fabienne Trolard, Simon Duval, Wolfgang Nitschke, Benedicte Menez, Celine Pisapia, Jihaine Ben Nacib, Muriel Andreani, Guilhem Bourrie
Summary: Fougerite, a natural green rust, is considered as a key mineral for life's emergence in the alkaline hydrothermal vents theory. It inherits the reactive properties of layered double hydroxides and has specific reactivity with metals and metalloids. Research suggests that fougerite could play a role as a membrane and catalytic engine in hydrothermal systems. Recent studies show that the formation of fougerite is likely in modern oceanic systems and it may have potential implications for the origin of life.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
C. Tichadou, M. Godard, M. Munoz, P. Labaume, A. Vauchez, E. C. Gaucher, S. Calassou
Summary: The study focused on the petrology, mineralogy, and geochemistry of hydrothermally altered peridotites from the North-Western Pyrenean belt, revealing different degrees of serpentinization and reaction paths in the cooling process. The formation of magnetite in these samples was found to be influenced by fluid composition rather than solely by temperature, leading to variations in serpentinization pathways within and among different massifs.
Article
Geochemistry & Geophysics
Jeremie Aubineau, Fleurice Parat, Abdellatif Elghali, Otmane Raji, Aissam Addou, Clement Bonnet, Manuel Munoz, Olivia Mauguin, Fabien Baron, Moulay Brahim Jouti, Oussama Khadiri Yazami, Jean-Louis Bodinier
Summary: Phosphorus in Moroccan phosphate minerals occurs mainly as microcrystalline carbonate fiuorapatite (CFA) and shows heterogeneous CO32- content at both regional and grain scales. The variations in CO32- content between phosphate basins are likely related to depositional conditions, highlighting the importance of studying the impact of CO32- on grain morphology for potential applications in long-term soil fertilization.
Article
Geosciences, Multidisciplinary
F. Locati, G. Collo, L. Madsen, M. Munoz, S. Marfil, P. Maiza
Summary: This study aims to investigate the local alteration process of basalts from the province of Corrientes and propose an alteration sequence. It was found that secondary products formed by the interaction of the rock and hydrothermal fluids at temperatures likely < -100°C-150°C. Different alteration stages were determined, with swelling clay minerals, iron oxides, calcite, and silica identified as the main alteration phases. These findings contribute to a better understanding of the alteration process of basalts.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2022)
Review
Geology
F. Hochscheid, R. Coltat, M. Ulrich, M. Munoz, G. Manatschal, P. Boulvais
Summary: This study focuses on a fossil ultramafic-hosted hydrothermal mineralized system in SE Switzerland to investigate the source of metals and the plumbing system using Sr isotope geochemistry. The results show that hydrothermal activity started during crustal thinning, with seawater percolating into the hyper-thinned crust and interacting with subcontinental mantle rocks. The serpentinites with a large range of Sr isotope ratios indicate long-lived fluid-rock interactions. On their way back to the seafloor, the serpentization-derived fluids mixed with seawater resulting in the precipitation of metal sulfides and Fe-Ca silicates. These findings are significant for understanding the formation of mineral deposits and oceanic ultramafic-hosted hydrothermal systems.
ORE GEOLOGY REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Frieder Klein, David L. Goldsby, Jian Lin, Muriel Andreani
Summary: This study investigates the relationships between serpentinite, silica-carbonate rock, and CO2-rich aqueous fluids in creeping faults of California. The carbonation of serpentinite is found to play a crucial role in aseismic creep, leading to the formation of talc and magnesite. These findings have significant implications for understanding the mechanisms behind earthquake generation in the California region.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
G. S. Pokrovski, C. Sanchez-Valle, S. Guillot, A. Y. Borisova, M. Munoz, A-L Auzende, O. Proux, J. Roux, J-L Hazemann, D. Testemale, Y. Shvarov
Summary: The redox dynamics of subduction processes remain poorly understood due to a lack of direct geochemical tracers. This study investigates the chemical and redox state of arsenic in serpentinites from the Tso Morari region, which are evidence of Himalayan subduction, using X-ray absorption spectroscopy. The findings reveal contrasting redox speciation of arsenic, from arsenide to arsenite and arsenate, allowing for reconstruction of the redox behavior of arsenic during subduction. The out-of-equilibrium release of highly oxidized fluids is reflected by the high As-V/As-III ratios observed. Arsenic in serpentinite is shown to be a sensitive record of subduction redox dynamics, providing valuable insights beyond traditional equilibrium approaches.
GEOCHEMICAL PERSPECTIVES LETTERS
(2022)
Article
Geology
Pan -Pan Niu, Shao-Yong Jiang, Wen -Tian Li, Pei-Long Cui, Yi-Chun Chen, Manuel Munoz
Summary: The Suixian Mo deposit is a recently discovered magmatic hydrothermal vein-type deposit in northern Hubei Province, China. The Mo orebodies are hosted in metamorphic rocks and the ore-forming fluids are mainly composed of magmatic fluids with a mixture of organic-containing water.
ORE GEOLOGY REVIEWS
(2022)
Article
Multidisciplinary Sciences
Muriel Andreani, Gilles Montagnac, Clementine Fellah, Jihua Hao, Flore Vandier, Isabelle Daniel, Celine Pisapia, Jules Galipaud, Marvin D. Lilley, Gretchen Fruh L. Green, Stephane Borensztajn, Benedicte Menez
Summary: The authors propose a method for abiotic organic synthesis and diversification in hydrothermal contexts, which involves the interaction between gases and minerals. The results greatly expand our understanding of the forms of abiotic organic carbon in hydrothermal environments and provide new pathways for studying the origin of life.
NATURE COMMUNICATIONS
(2023)
Article
Geology
Pan -Pan Niu, Shao-Yong Jiang, Manuel Munoz
Summary: The Maoping Pb-Zn deposit in southwest China is a major germanium producer. The mineralization process can be divided into three stages, with C5 and C1 sphalerites having the highest germanium contents. Fluids from the Zaige and Baizuo Formations, mixed with metal-bearing basin brine, caused the first-stage germanium enrichment in C1, C2, C3, and C4 sphalerites, while fluids from the Datang Formation led to the second-stage enrichment of germanium in C5 sphalerite.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
R. Coltat, M. Andreani, C. G. C. Patten, M. Godard, B. Debret, J. Escartin
Summary: The formation of ultramafic-hosted seafloor massive sulfide deposits (UM-SMSs) at Mid-Ocean Ridges is closely related to hot, reduced, acidic, and metal-rich fluids. Genetic implications on the formation of mineralized systems can be seen from fluid circulation and Fe-Ca metasomatism in ultramafic-hosted hydrothermal deposits. The comprehensive study of deep magmatic and hydrothermal processes provides insight into the nature and geometry of mantle exhumation and serpentinization.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Environmental Sciences
Fatima Akfas, Abdellatif Elghali, Jean-Louis Bodinier, Fleurice Parat, Manuel Munoz
Summary: Phosphoric acid manufacturing generates large amounts of phosphogypsum (PG), a by-product generally disposed without any pretreatment. Phosphogypsum may contain valuable elements such as rare earth elements (REEs). This study aims to evaluate the trace element release rate from PG under atmospheric conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)