Article
Chemistry, Multidisciplinary
Lihui Zhang, Xiaobo Li, Fenfa Yao, Longren Li, Hongyang Huang, Xuewen Zhao, Shuhao Liu, Yonghong Cheng, Hua Xu, Jinying Zhang
Summary: This study reports a fast and nondestructive method to determine the crystallographic orientation of 2D violet phosphorus nanoflakes using Raman spectroscopy. It was found that the nanoflakes have specific in-plane cleavage edges and edge alignment. The direction of the b-axis (a-axis) can be identified by measuring the intensity of the A(g) mode in the Raman spectrum, specifically the appearance or disappearance of the 491 cm(-1) peak, relative to the cleavage edge.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Geochemistry & Geophysics
Victor Cardenes, Marco A. Lopez-Sanchez, Fabrice Barou, Javier Olona, Sergio Llana-Funez
Summary: The article discusses the importance of mica-rich rocks in the structure of the continental crust, and how roofing slates serve as an excellent benchmark for studying the relationship between rock microstructure and seismic anisotropy. The research findings highlight the significant impact that cracks, pores, and fractures have on the seismic velocities of single-foliated slates, contributing to a strong anisotropy.
Article
Geosciences, Multidisciplinary
H-R Wenk, J. Huang, M. Devoe, J. Gomez-Barreiro, R. Vasin, Y. Ren, S. Barrios-Sanchez
Summary: This study explored the preferred orientation of eleven slates and one phyllite of different composition and metamorphic grade from Northern Spain. The research found that phyllosilicates displayed high crystallographic and shape preferred orientation, while quartz had a random crystallographic orientation. The anisotropy of these slates significantly contributes to seismic anisotropy in the upper crust.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Chemistry, Physical
Xiujuan Chen, Wei Li, Shanshan Hu, Novruz G. Akhmedov, David Reed, Xiaolin Li, Xingbo Liu
Summary: The application of a polyvinyl alcohol coating on the zinc anode has successfully achieved dendrite-free and long-life aqueous zinc batteries, demonstrating superior cyclability and durability. The insights gained from this research shed light on the future development of stable zinc anodes.
Article
Geochemistry & Geophysics
Ran Issachar, Ram Weinberger, Tsafrir Levi, Jessica Barabasch, Janos L. Urai
Summary: In this study, we investigated the magnetic fabrics and microstructures of diamagnetic rocksalt samples from the Sedom salt wall in the Dead Sea Basin. We used comprehensive analyses to explore the deformation mechanisms and mineral sources of the anisotropy of magnetic susceptibility (AMS). Our results suggest that the AMS of the rocksalts provides a textural proxy that reflects deformation processes, despite their very low magnetic susceptibility.
Article
Geosciences, Multidisciplinary
Frantisek Hrouda, Jan Franek, Stuart Gilder, Martin Chadima, Josef Jezek, Stepanka Mrazova, Michal Ponavic, Martin Racek
Summary: Single crystals of graphite demonstrate strong crystalline anisotropy and diamagnetism, with magnetic susceptibility measured in alternating fields showing both in-phase and out-of-phase components. The study of anisotropy of magnetic susceptibility in graphite ore provides insight into the preferred orientation of graphite and the presence of paramagnetic and ferromagnetic minerals within the rock. The high opAMS degree and lineation perpendicular to metamorphic foliation suggest a significant LPO of graphite, likely formed during Variscan regional metamorphism.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Geography, Physical
Maria-Gema Llorens, Albert Griera, Paul D. Bons, Ilka Weikusat, David J. Prior, Enrique Gomez-Rivas, Tamara de Riese, Ivone Jimenez-Munt, Daniel Garcia-Castellanos, Ricardo A. Lebensohn
Summary: This study investigates the influence of ice deformation history on the development of crystallographic preferred orientations (CPOs) using full-field numerical simulations. The results show that the second deformation event tends to destroy the first inherited fabric, but the transition is slow when crystallographic axes are critically oriented with respect to the second imposed regime. Therefore, caution must be exercised when interpreting observed CPOs in areas with complex deformation histories.
Article
Geochemistry & Geophysics
Jong Kyu Park, Ji Young Shin, Seungwon Shin, Yong-Hee Park
Summary: This paper provides a detailed analysis of the anisotropy of magnetic susceptibility (AMS) and paleomagnetic data from Quaternary basalt outcrops along the Hantangang River in Korea. Through sample collection and mineral magnetic analysis, the dominant magnetic carrier in the basalt samples was identified as titanomagnetite. The AMS results showed weak anisotropy and scattered AMS directions, indicating a low degree of preferred orientation of grains within the rocks. The study also found distinct flow patterns in the southwestern region, suggesting the presence of unknown volcanic sources.
Article
Physics, Applied
Seung Hwae Heo, Seongheon Baek, Tae Joo Shin, Jae Sung Son
Summary: In this study, textured SnSe2 thin films were fabricated using a solution-processed method, which exhibited strong crystallographic orientation and high electron concentrations. The microstructure of the thin films determined their electronic transport properties, and the optimal structure showed an enhanced thermoelectric power factor. These findings provide a way to enhance the thermoelectric and electronic properties of highly anisotropic materials.
APPLIED PHYSICS LETTERS
(2022)
Article
Geosciences, Multidisciplinary
U. D. Bellon, M. S. D'Agrella-Filho, F. A. Temporim, G. F. Souza Junior, C. C. Soares, C. A. D. Amaral, L. P. Gouvea, R. I. F. Trindade
Summary: By analyzing the anisotropy of magnetic susceptibility and microstructural characteristics, the study reveals the tectonic significance of the Venda Nova pluton in the collapsing orogen, showing that buoyancy forces controlled magma emplacement and solid-state deformation within the pluton may result from reactivation of emplacement structures. The emplacement of inversely zoned post-orogenic plutons in colder forelands of the orogen may record different stages of a large collapsing orogen in a single plutonic body.
JOURNAL OF STRUCTURAL GEOLOGY
(2021)
Article
Geochemistry & Geophysics
G. F. Souza Junior, R. I. F. Trindade, F. A. Temporim, U. D. Bellon, L. P. Gouvea, C. C. Soares, C. A. D. Amaral, V Louro
Summary: The Cambrian Santa Angelica intrusive complex in SE Brazil consists of two lobes with concentric fabric and bull's eyes shapes, intruding during the post-collisional phase of the Aracuai orogen. While described as magmatic internally, the complex shows solid-state deformation at its borders and an internal shear zone. This study suggests a reverse diapiric mechanism due to the negative buoyancy of mafic nuclei during crystallization.
Article
Chemistry, Multidisciplinary
Sooeun Shin, Seongrok Seo, Seonghwa Jeong, Anir S. Sharbirin, Jeongyong Kim, Hyungju Ahn, Nam-Gyu Park, Hyunjung Shin
Summary: Crystallization kinetics control crystallographic orientation and result in anisotropic properties of materials. Preferential orientation with advanced optoelectronic properties enhances the performance of photovoltaic devices. This study investigates the role of methylammonium chloride (MACl) as a stabilizer and a controller in the crystallization kinetics of formamidinium lead tri-iodide (alpha-FAPbI(3)). It is found that higher MACl concentration leads to slower crystallization kinetics, larger grain size, and [100] preferred orientation, resulting in improved device performance such as higher short-circuit current density and fill factor. A MACl concentration of 40 mol% achieves the highest power conversion efficiency of 24.1%.
Article
Geochemistry & Geophysics
Tobias Schmiedel, Steffi Burchardt, Tobias Mattsson, Frank Guldstrand, Olivier Galland, Joaquin Palma, Henrik Skogby
Summary: Understanding magma transport in sheet intrusions is crucial for volcanic unrest interpretation. A study of high-viscosity dykes in Chachahuen volcano reveals segments with bifurcations and different shapes at the tips, similar to trends in low-viscosity dykes. This challenges the use of final sheet geometries as proxies for emplacement mechanism.
Article
Geochemistry & Geophysics
Sheng Fan, David J. Prior, Travis F. Hager, Andrew J. Cross, David L. Goldsby, Marianne Negrini
Summary: Kinking is an important process during crystal plastic deformation and may influence the mechanical properties of the Earth's lithosphere and planetary cryosphere. Microstructural analyses of deformed ice samples show that kinking and dynamic recrystallization both play a role in grain nucleation, depending on the crystallographic orientations of individual grains.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Materials Science, Ceramics
Yunqi Fang, Yang Sun, Bing Guo, Hangyan Shen, Ruirui Yang
Summary: WS2 films with preferred orientation along the (002) plane were prepared using shear flow technology in this study. The influence of polyvinyl alcohol (PVA) concentration and wedge angle on the oriented structure of the films was systematically studied. The results showed that increasing PVA concentration and wedge angle enhanced the (002) plane orientation of WS2 in the films. This research provides theoretical and technical support for preparing preferred orientation 2D materials.
CERAMICS INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Kenneth A. Hoffman, Pierre Camps, Matt Carlton
GEOPHYSICAL JOURNAL INTERNATIONAL
(2020)
Article
Environmental Sciences
O. Menshov, S. Spassov, P. Camps, S. Vyzhva, P. Pereira, T. Pastushenko, V. Demidov
ENVIRONMENTAL EARTH SCIENCES
(2020)
Article
Geosciences, Multidisciplinary
Tiago Valim Angelo, Marcos Egydio-Silva, Filipe Altoe Temporim, Marina Seraine
JOURNAL OF STRUCTURAL GEOLOGY
(2020)
Article
Geochemistry & Geophysics
Esther Izquierdo-Llavall, Armel Menant, Charles Aubourg, Jean-Paul Callot, Guilhem Hoareau, Pierre Camps, Eve Pere, Abdeltif Lahfid
Article
Geochemistry & Geophysics
F. A. Temporim, R. I. F. Trindade, E. Tohver, C. C. Soares, L. P. Gouvea, M. Egydio-Silva, C. A. D. Amaral, G. F. Souza Jr
Article
Geosciences, Multidisciplinary
L. M. Alva-Valdivia, M. A. Bravo-Ayala, P. Camps, Thierry Poidras, A. N. Mahgoub
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Geosciences, Multidisciplinary
Emilio Herrero-Bervera, Stephen Athens, Evdokia Tema, Luis Manuel Alva Valdivia, Pierre Camps, Alejandro Rodriguez Trejo
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Environmental Sciences
Sarah Letaief, Pierre Camps, Thierry Poidras, Patrick Nicol, Delphine Bosch, Romane Pradeau
Article
Geochemistry & Geophysics
Elisa M. Sanchez-Moreno, Manuel Calvo-Rathert, Avto Goguitchaichvili, George T. Vashakidze, Pierre Camps, Juan Morales-Contreras, Nestor Vegas-Tubia, Vladimir A. Lebedev
Summary: Using a multimethod approach, including MSP and Thellier-type methods, reliable paleointensity data were obtained through strict selection criteria, demonstrating consistency in intensity values from different methods.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
Catherine Girard, Raimund Feist, Angelo Mossoni, Jean-Jacques Cornee, Pierre Camps, Anne-Lise Charruault, Carlo Corradini
Summary: Large-scale magnetic susceptibility variations in ancient sediments are interpreted as related to sea-level and climate changes affecting the erosional regime and detrital input. Comparison of MS records in Avalonia and Gondwana regions during the Famennian revealed striking dissimilarities, indicating the existence of an existing remnant oceanic barrier during early Famennian times. However, uniformity in MS values was observed after the drop in MS values in North Gondwana, suggesting the disappearance of oceanic barriers during the early middle Famennian T-R fluctuations of the sea-level.
Article
Geochemistry & Geophysics
Priscila Rezende Fernandes, Andrea Tommasi, Alain Vauchez, Sergio Pacheco Neves, Felix Nannini
Summary: The petrostructural analysis of 31 mantle xenoliths indicates that they sample the mantle root of the Sao Francisco craton (SFC), but were modified by reactive transport of magmas during the Alto Parnaiba Igneous Province (APIP) between 120 and 90 million years ago. This resulted in heterogeneous modal metasomatism, Fe enrichment, development of specific microstructures in the peridotites, and moderate heating of the cratonic mantle root. These changes may explain the local weak negative anomaly observed in the lithospheric mantle beneath the APIP.
Review
Geochemistry & Geophysics
Sergio P. Neves, Andrea Tommasi, Alain Vauchez, Thais Andressa Carrino
Summary: This article reviews the main characteristics and development control factors of the Borborema shear zone system in northeastern Brazil, highlighting the importance of rheological heterogeneity in controlling the formation and evolution of the complex continental scale shear zone system.
Article
Environmental Sciences
Sarah Letaief, Pierre Camps, Claire Carvallo
Summary: Environmental magnetism techniques are being increasingly used to map the deposition of particulate pollutants on various accumulative surfaces. This study evaluates the effectiveness of these techniques in tracing the source signals of pollutants using a k-nearest neighbors algorithm. The algorithm successfully predicts the dominant traffic-related sources for different types of accumulative surfaces and demonstrates the possibility of quantifying their contributions to the overall magnetic signal measured. These results suggest the potential for magnetic mapping to complement traditional methods of measuring air quality and improving pollutant dispersion models.
ENVIRONMENTAL RESEARCH
(2023)
Article
Geochemistry & Geophysics
Leny Montheil, Melody Philippon, Philippe Muench, Pierre Camps, Bram Vaes, Jean-Jacques Cornee, Thierry Poidras, Douwe J. J. van Hinsbergen
Summary: This study presents a regional paleomagnetic data set from the northern Lesser Antilles, the Virgin Islands, and Puerto Rico, and quantifies the rotation of the Puerto Rico-Virgin Island (PRVI) block and the Northern Lesser Antilles (NoLA) block. The results show that both blocks underwent at least 45 degrees counterclockwise rotation since the Eocene, with the PRVI block completing its rotation in the middle Miocene and the NoLA block rotating slower until the late Miocene. These findings have important implications for the understanding of Caribbean-North American plate motion and the paleogeography of the eastern Caribbean.
Article
Geochemistry & Geophysics
Oswald Malcles, Philippe Vernant, Jean Chery, Pierre Camps, Gael Cazes, Jean-Francois Ritz, David Fink
