Article
Geology
Sandra de Castro, Francisco Javier Hernandez-Molina, Wouter de Weger, Francisco Jose Jimenez-Espejo, Francisco Javier Rodriguez-Tovar, Anxo Mena, Estefania Llave, Francisco Javier Sierro
Summary: This study focuses on identifying differences in deep-water sediments through Principal Component Analysis of grain size and geochemistry, sedimentary facies, and various sedimentary processes, providing insights into the interrelation of different types of deposits in deep-water environments.
Article
Geography, Physical
Paul Moal-Darrigade, Emmanuelle Ducassou, Jacques Giraudeau, Andre Bahr, Stefanie Kaboth-Bahr, Vincent Hanquiez, Marie-Claire Perello
Summary: High-resolution records from IODP sites U1386 and U1387 during Expedition 339 in the Faro drift allowed for an assessment of the impact of upper core intensifications of the MOWu and changes in sediment supply in the northern Gulf of Cadiz since the Middle Pleistocene. The study revealed that MOWu velocity at the seabed was higher during MIS 2-1 than during MIS 12-11, and that MOWu intensity increased during deglaciation V and MIS 11, contributing to higher heat and moisture transport towards high latitudes.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geosciences, Multidisciplinary
Debora Duarte, Cristina Roque, Zhi Lin Ng, F. Javier Hernandez-Molina, Vitor Hugo Magalhaes, Sonia Silva, Estefania Llave
Summary: The Gulf of Cadiz Contourite Depositional System (GCCS) formation and evolution are controlled by tectonic activity, with structural features and tectonic events having a significant impact on seafloor relief and local oceanic circulation processes.
Article
Materials Science, Multidisciplinary
Kai Hu, Jun Yi, Bo Huang, Xilei Bian, Gang Wang
Summary: This study overcomes the trade-off between strength and ductility in pure nickel materials by using grain boundary relaxation and optimizing grain size. The results show that grain boundary relaxation can improve both tensile strength and uniform elongation of nickel, and enhance the plastic deformation through controlling dislocation activities.
APPLIED MATERIALS TODAY
(2022)
Article
Geosciences, Multidisciplinary
Hannah L. Brooks, Elisabeth Steel, Mikaela Moore
Summary: This study evaluates the application of laser diffraction particle analysis in siliciclastic sedimentary rocks, focusing on whole-rock disaggregation, subsampling, and comparison with thin-section analysis. Using ultrasonic bath and SELFAG as disaggregation tools, it is found that ancient, well cemented rocks can be disaggregated. However, grain-size measurements become less accurate with increasing sample lithification when using the SELFAG method.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Dmitry Frey, Dmitrii Borisov, Vladimir Fomin, Eugene Morozov, Oleg Levchenko
Summary: Contourites are sediments formed or modified by persistent bottom currents, which can create various erosional and depositional features on the seafloor. The study of contourites is a multidisciplinary topic that combines physical oceanography and marine geology. Studying bottom circulation is crucial for understanding lateral sedimentation. Numerical modeling can help fill the knowledge gaps in bottom circulation in the region.
JOURNAL OF MARINE SYSTEMS
(2022)
Article
Chemistry, Physical
Hidetoshi Somekawa, Kei Nishikawa, Taku Moronaga, Takahito Ohmura
Summary: Two types of lithium metals with different average grain sizes were successfully produced through extrusion process and rapid molding process. The hardness of the metals was found to be influenced by grain size, decreasing with a finer grained structure, which is contrary to the trend observed in other light-weight pure metals. The fine-grained Li metal exhibited a large strain rate dependence and unusual behavior, attributed to the contribution of grain boundary sliding to deformation. Additionally, the fine-grained Li metal showed better electrochemical characteristics in terms of over-potential and voltage response during charging and discharging operations.
JOURNAL OF POWER SOURCES
(2023)
Article
Automation & Control Systems
Xin Hou, Youjuan Ma, Xiao Wang, Wenkai Shen, Maomao Cui, Huixia Liu
Summary: In this paper, a new laser shock microforming method called laser shock sheet bulk microforging (LSSBMF) is proposed, combining the advantages of sheet bulk forming and laser shock microforming. The effects of grain size, thickness, and die geometry on the forming properties are investigated through experiments and numerical simulation. The results show that the grain size affects the forming depth and microhardness, and the die geometry and workpiece thickness influence the equivalent plastic stress and forming depth.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Shaohua Zhao, Feng Cai, Zhifei Liu, Chao Cao, Hongshuai Qi
Summary: The study conducted various sedimentological analyses on three short sediment cores retrieved from the Taiwan Strait, showing that the Yangtze River is the main source of terrigenous sediments over the past 150 years, with silt and clay being the predominant components. The inferred clay mineral assemblage and grain-size compositions serve as indirect indicators to reveal East Asian monsoon variations.
Article
Materials Science, Ceramics
D. Demirskyi, O. Vasylkiv, K. Yoshimi
Summary: This study reports the three-point flexural strength and fracture toughness of monolithic hafnium carbide up to 2000 degrees C. It was found that the dependence of strength on strain rate varied for HfC with different grain sizes at high temperatures. The activation energy for high-temperature deformation was identified as 370 kJ/mol, which was in agreement with diffusion reports of C in hafnium carbide.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Environmental Sciences
Xin Fan, Qiang Xue, Siwen Liu, Jie Tang, Jiyang Qiao, Yuanying Huang, Jingmin Sun, NanNan Liu
Summary: This study investigated the impact of particle size distribution and clay minerals on ammonia nitrogen pollution caused by weathered crust elution-deposited rare earth tailings. The results indicated that as soil particle size decreases, both soil specific surface area and clay content increase, leading to stronger AN enrichment ability. Clay minerals with different capacities for AN enrichment vary with sampling depth, influencing the distribution of AN in the mine site where a pattern of increase and then decrease in AN content with vertical depth was observed.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Physics, Applied
C. S. Kim, S. L. Ding, Y. J. O, L. Zha, C. Yun, W. Y. Yang, J. Z. Han, S. Q. Liu, H. L. Du, C. S. Wang, J. B. Yang
Summary: The study investigates the effects of microstructural factors on the performance of nanocomposite magnets through micromagnetic simulations. It reveals that the remanence is almost independent of the geometry of the soft phase, while coercivity decreases with increasing soft grain size. Additionally, a significant enhancement in energy product is observed with increasing soft grain size only when hard grain size is less than 15 nm.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Environmental Sciences
Xu Tian, Xilin Zhang, Jinli Wang, Zhilei Sun, Ming Liu, Jinhuan Zhao, Lin Zhang, Dejiang Fan, Fangjian Xu
Summary: The sediments of core SCS18-1 from the Beipo seamount in the northern South China Sea mainly originate from fluvial input with some contribution from eolian material. The clay mineral assemblages are stable and mainly come from Taiwan, with the Pearl River and Luzon Islands as secondary sources. The relative content of end-members EM1+EM2 represents the variation of East Asia summer monsoon strength, while the relative content of EM3 reflects the East Asian winter monsoon change. The material supply of core SCS18-1 is mainly controlled by solar radiation in the Northern Hemisphere.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
C. Zhao, W. Zhou, Q. H. Hu, H. Xu, C. Zhang
Summary: This study measured the porosities of granular samples using a modified bulk density method and helium pycnometry, aiming to assess isolated pores in total porosity. The results showed that the modified bulk density measurement provided semi-quantitative results with acceptable repeatability, and changes in effective porosity were related to grain size for sandstone and chalk, and isolated pores for shales with poor pore connectivity.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Stapana Kongsen, Sumet Phantuwongraj, Montri Choowong
Summary: Grain size, sedimentary structures, and luminescence dating were used in this study to investigate the sediment sources and transport processes of ancient coastal storm events in Prachuap Khiri Khan, Southern Thailand. A total of 21 candidate coastal storm events were identified based on analysis of sand samples collected from beach ridges and swales. Different grain size distributions and sedimentary structures were observed in storm deposits compared to normal beach sediments.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Energy & Fuels
Olmo Miguez-Salas, Javier Dorador, Francisco J. Rodriguez-Tovar, Fatima Linares
Summary: Micro-CT analysis was used to evaluate the effects of bioturbation on porosity distribution in contourite facies for the first time. Different trace maker behaviors may lead to variable changes in porosity distribution, with Macaronichnus and Chondrites showing significant impacts on porosity values.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Oceanography
Jordi Grinyo, Marco Francescangeli, Andreu Santin, Gemma Ercilla, Ferran Estrada, Ariadna Mecho, Emanuela Fanelli, Corrado Costa, Roberto Danovaro, Joan Batista Company, Ignacio Sobrino, Javier Valencia, Jacopo Aguzzi
Summary: The deep-sea ecosystems of the Iberian margin have been greatly impacted, yet there is limited knowledge on their biodiversity and functioning. This study investigated the megabenthic assemblages associated with different geomorphological structures in the Gulf of Cadiz and highlights their high diversity and the need for their protection and inclusion in future management plans.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2022)
Article
Geosciences, Multidisciplinary
D. Casalbore, M. Biancone, D. Casas, P. Mata, B. Alonso, G. Ercilla, F. L. Chiocci, P. Barcenas, N. Lopez-Gonzalez
Summary: The Holocene morpho-stratigraphic evolution of a compound submarine deltaic system linked with the Antas and Almanzora Rivers has been reconstructed from the integrated analysis of geomorphology, seismo-stratigraphy and sedimentology. The main factors driving the evolution of this system are the interplay between paleo-topography and riverine and marine processes, as well as sea level changes during the Holocene. The complex interaction between sedimentary gravity flows, storm-waves, shelf currents, fluid seepage and retrogressive slope failures has also contributed to the present-day morphological features.
Article
Geosciences, Multidisciplinary
Victor Tendero-Salmeron, Jesus Galindo-Zaldivar, Elia D'Acremont, Manuel Catalan, Yasmina M. Martos, Abdellah Ammar, Gemma Ercilla
Summary: This paper presents a detailed study on magnetic anomalies in the Alboran Sea region, revealing the distribution of magmatism and their relationship to geological structural evolution. The results suggest that the main magnetic anomalies are associated with deep igneous bodies, providing insights into the tectonic inversion of the Alboran Sea.
Article
Geography, Physical
Gemma Ercilla, Jesus Galindo-Zaldivar, Ferran Estrada, Javier Valencia, Carmen Juan, David Casas, Belen Alonso, Ma Carmen Comas, Victor Tendero-Salmeron, Daniele Casalbore, Maria Azpiroz-Zabala, Patricia Barcenas, Silvia Ceramicola, Francesco L. Chiocci, Javier Idarraga-Garcia, Nieves Lopez-Gonzalez, Pilar Mata, Desiree Palomino, Juan Antonio Rodriguez-Garcia, Manuel Teixeira, Jose Nespereira, Juan Tomas Vazquez, Mariano Yenes
Summary: This study presents a multidisciplinary analysis of the Palomares continental margin and Algerian abyssal plain, revealing that their complex geomorphology is a result of sedimentary response to the Aguilas Arc continental tectonic indentation in the Eurasian-Africa plate collision.
Article
Geosciences, Multidisciplinary
E. d'Acremont, S. Lafuerza, A. Rabaute, M. Lafosse, M. Jolliver Castelot, C. Gorini, B. Alonso, G. Ercilla, J. T. Vazquez, T. Vandorpe, C. Juan, S. Migeon, S. Ceramicola, N. Lopez-Gonzalez, M. Rodriguez, B. El Moumni, O. Benmarha, A. Ammar
Summary: Earthquakes, blind thrust activity, contourite sedimentation, and fluid dynamics are the main controlling mechanisms of submarine landslides in the South Alboran Sea.
Article
Geology
M. Poyatos-More, F. Garcia-Garcia, F. J. Rodriguez-Tovar, J. Soria, C. Viseras, F. Perez-Valera, I Midtkandal
Summary: This study presents an outcrop example from the Upper Miocene of the Betic Cordillera (Spain) to propose a model for the development of transgressive sharp-based mixed carbonate-silicidastic deposits and provide criteria to differentiate them from their regressive counterparts.
SEDIMENTARY GEOLOGY
(2022)
Article
Chemistry, Analytical
Jesus Galindo-Zaldivar, Antonio J. Gil, Victor Tendero-Salmeron, Maria J. Borque, Gemma Ercilla, Lourdes Gonzalez-Castillo, Alberto Sanchez-Alzola, Maria C. Lacy, Ferran Estrada, Manuel Aviles, Pedro Alfaro, Asier Madarieta-Txurruka, Fernando Chacon
Summary: The active tectonic deformation of the Gibraltar Arc, including extension and shortening, has been supported by the GNSS monitoring results, providing new insights for the tectonic models of arcuate orogens.
Article
Geology
Wouter de Weger, F. Javier Hernandez-Molina, Francisco Javier Sierro, Domenico Chiarella, Estefania Llave, Juan J. Fedele, Francisco Javier Rodrigues-Tovar, Olmo Miguez-Salas, Mohamed Amine Manar
Summary: This study reports the sedimentary evolution and facies distribution of a contourite channel system related to the late Miocene palaeo-Mediterranean Outflow Water in the Rifian Corridor, Morocco. The channel evolution and facies distribution are found to be related to spatiotemporal changes in flow characteristics of the palaeo-Mediterranean Outflow Water.
Article
Geology
Gijs van Dijk, Jasper Maars, Federico Andreetto, F. Javier Hernandez-Molina, Francisco. J. J. Rodriguez-Tovar, Wout Krijgsman
Summary: A unique sedimentary deposit called the Arenazzolo Formation in the Sicilian Caltanissetta Basin, Italy, has been studied to understand its origin and its link to the Messinian Salinity Crisis. This sandy deposit was formed by persistent bottom currents during a transgression, possibly associated with the reconnection of major isolated water bodies.
Article
Geosciences, Multidisciplinary
Celia Martin-Puertas, Armand Hernandez, Eulogio Pardo-Iguzquiza, Laura Boyall, Chris Brierley, Zhiyi Jiang, Rik Tjallingii, Simon P. E. Blockley, Francisco Javier Rodriguez-Tovar
Summary: According to a lake-sediment record and model simulations, meltwater discharge in the mid-Holocene North Atlantic disrupted decadal climate variability, suggesting that future melting on Greenland may hinder climate predictability in the region.
Article
Geosciences, Multidisciplinary
Belen Alonso, Gemma Ercilla, Carmen Juan, Nieves Lopez-Gonzalez, Isabel Cacho, Guillermo Frances, Desiree Palomino, Patricia Barcenas, Mariano Yenes, Jose Nespereira, Blanca Ausin, Pilar Mata, David Casas
Summary: This study presents the impact of light intermediate and dense deep Mediterranean bottom currents on sedimentation in the Alboran Sea and its paleoceanographic significance. Three contourite stratigraphic models are defined based on integrated chronostratigraphical, sedimentological, and compositional data. These models can be used to identify and correlate the paleoceanographic events of the different water masses throughout the Mediterranean.
Article
Geosciences, Multidisciplinary
Maria Teresa Pedrosa-Gonzalez, Jose Manuel Gonzalez-Vida, Jesus Galindo-Zaldivar, Sergio Ortega, Manuel Jesus Castro, David Casas, Gemma Ercilla
Summary: A modelling approach using a numerical model has provided new insights into the tsunamigenic potentiality of submarine landslides. The study found that tsunami waves triggered by the landslide are mainly influenced by the sliding mechanism and the bathymetry. The direction of propagation and the coastal impact are controlled by local bathymetry.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Olga Sanchez-Guillamon, Jose L. Rueda, Claudia Wienberg, Gemma Ercilla, Juan Tomas Vazquez, Maria Gomez-Ballesteros, Javier Urra, Elena Moya-Urbano, Ferran Estrada, Dierk Hebbeln
Summary: “The study found that these carbonate mounds may have formed during the favorable climatic conditions for cold-water corals in the late Pleistocene. They are currently covered with typical bathyal sedimentary habitat species, but remains of potential mound-forming species were also detected in the form of fossils.”