Article
Geosciences, Multidisciplinary
Bruno Daniel Leite Mendes, Daniel Pastor-Galan, Mark J. Dekkers, Wout Krijgsman
Summary: This study investigates the uncertainties regarding the formation mechanisms of the Cantabrian Orocline and Central Iberian curve during the Paleozoic era. Through paleomagnetic research on late Carboniferous-early Permian vertical-axis rotations in SW Iberia, it was found that the Greater Cantabrian Orocline hypothesis is supported, indicating a significant change in stress field during the late Carboniferous.
GEOSCIENCE FRONTIERS
(2021)
Article
Geochemistry & Geophysics
Jorge Acevedo, Gabriela Fernandez-Viejo, Sergio Llana-Funez, Carlos Lopez-Fernandez, Javier Olona, Diego Perez-Millan
Summary: The cross-correlation of ambient noise records provides valuable insights into the crustal structure of the Variscan orogen in NW Iberia. The study presents high-resolution shear wave velocity and radial anisotropy variation models of the upper crust, revealing the geological domains and major structures associated with the orogeny. The results also indicate variations in elastic properties and anisotropy patterns with depth.
Article
Geology
Ruben Diez Fernandez, Ricardo Arenas, Esther Rojo-Perez, Sonia Sanchez Martinez, Jose Manuel Fuenlabrada
Summary: The Neoproterozoic and Palaeozoic rocks of the Merida Massif in SW Iberia have been grouped into tectonostratigraphic units, separated by crustal-scale thrusts and/or extensional detachments. This tectonic setting was formed during the Cadomian Orogeny and later modified by the Variscan Orogeny, resulting in the juxtaposition of different units and the formation of folds and thrusts. The Merida Ophiolite represents a Cadomian suture zone exposure in the Gondwanan realm, reflecting inland transference of allochthonous terranes onto mainland Gondwana during different geological periods.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Chemistry, Physical
Kai Ren, Yuan Yan, Zhuoran Zhang, Minglei Sun, Udo Schwingenschlogl
Summary: Using calculations and search, we predicted a series of stable LixBy monolayers. They exhibit different properties, including metallic, semiconductor, and special characteristics such as small Poisson's ratio and high hole mobility.
APPLIED SURFACE SCIENCE
(2022)
Article
Geochemistry & Geophysics
Manuel Francisco Pereira, Jose Manuel Fuenlabrada, Carmen Rodriguez, Antonio Castro
Summary: Carboniferous magmatism in southwestern Iberia played a crucial role in understanding the formation of the Pangea supercontinent and recorded the complex oblique convergence between Laurussia and Gondwana. A new tectonic model suggests that the Iberia Variscan belt was the site of simultaneous collisional and accretionary orogenic processes.
Article
Geochemistry & Geophysics
Cristina Accotto, Antonio Azor, David Martinez Poyatos, Antonio Pedrera, Francisco Gonzalez Lodeiro
Summary: The Ossa-Morena Zone is a Gondwana-related terrane composed mainly of Cambrian rocks. U-Pb dating of zircon grains from 15 samples revealed the absence of a significant Stenian-early Tonian population in the Cambrian Ossa-Morena rocks, in contrast to the results from middle Ordovician-Lower Devonian rocks in the same area. This suggests a change in the paleogeographic/paleotectonic evolution of the Ossa-Morena Zone during the late Ediacaran-early Ordovician period, possibly involving an eastward displacement and a reorganization of drainage systems.
Article
Geochemistry & Geophysics
Imma Palomeras, Siddique A. Ehsan, David J. Martinez Poyatos, Puy Ayarza, David Marti, Ramon Carbonell, Antonio Azor, Luis M. Parra, Ignacio Marzan
Summary: The nature of the crust beneath central Iberia was estimated using wide-angle seismic reflection/refraction transect, revealing regional variations in the composition of the upper and lower crust. The upper crust is mainly composed of low-grade metasedimentary rocks in the southern and central segments, while the northern segment is dominated by igneous rocks. A sharp boundary between the two crustal layers is observed between 12 km (south) and 18 km (north) depth, with the lower crust showing low Poisson's ratios suggesting a felsic composition. Interactions with mafic components are suggested by lamination observed in the data.
Article
Geochemistry & Geophysics
Ruben Diez Fernandez, Carlos Fernandez, Ricardo Arenas, Irene Novo-Fernandez
Summary: This study focuses on the Devonian suture zone known as the Central Unit defined by the Azuaga Fault, revealing its association with Variscan orogenic movements and unusual structural characteristics. The research also highlights the impact of strike-slip faults on Variscan suture zones in Europe, showing that the location of suture zone exposures and its root are not always aligned.
Article
Engineering, Marine
Kai Yan, Yong Wang, Xianghua Lai, Yanli Wang, Zhiyong Yang
Summary: The influence of saturation on the Poisson's ratio v of reservoir sediments has significance in oil and gas exploration. Using a self-developed test system, the Poisson's ratio variation of reservoir silty-fine sand in Hangzhou Bay, China was studied. The results showed non-monotonic variations of P- and S-wave velocities with decreasing saturation, reaching a maximum at the optimum saturation S-r((opt)). With gas intrusion, the Poisson's ratio of saturated sand dropped suddenly, stabilized, attenuated, and reached a minimum at S-r((opt)).
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Editorial Material
Geochemistry & Geophysics
Ruben Diez Fernandez, Carlos Fernandez, Ricardo Arenas, Irene Novo-Fernandez
Summary: Geological mapping, structural data, and analytical modeling support the notion that the Central Unit belongs to a rootless Devonian suture zone that underwent late uplift and upright folding. However, other studies overlook this evidence and fail to interpret the structural dip angle accurately in seismic images. Overall, the model proposed by Diez Fernandez et al. remains valid.
Article
Geosciences, Multidisciplinary
Xu Wang, Ling Chen, Huajian Yao
Summary: The study introduces a novel seismic imaging method to acquire shallow crustal velocity and Poisson's ratio structures at individual stations, demonstrating its validity through synthetic experiments and field applications. Results from experiments in the Sichuan Basin, China, revealed underground structures and lithological features, reflecting stable sedimentary environments and geological processes related to tectonic deformation.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Chemistry, Physical
Hyekyoung Choi, Bok-Ki Min, Sung-Jae Joo, Bong-Seo Kim, Kyoungho Lee, Hyelin Kang, Yeon Hyang Sim, Min Ju Yun, Dong Yoon Lee, Seung I. Cha
Summary: Wearable thermoelectric generators use deformable gaskets filled with air to support thermoelectric legs, achieving thermal isolation and a larger temperature difference. The deformable gasket also has reversible auxetic metastructure, suitable for stretchable wearable devices. This approach provides an efficient way to convert thermal energy into electrical energy and expands potential applications for self-powered wearable electronics.
ADVANCED ENERGY MATERIALS
(2023)
Article
Engineering, Civil
Jiefu Liu, Wensu Chen, Hong Hao, Zhonggang Wang
Summary: This study investigates the effect of Poisson's ratios on the crashworthiness of in-plane honeycombs, analyzing critical crushing characteristics under different crushing speeds. By combining analytical models and numerical methods, the importance of Poisson's ratios on crushing strength is revealed, laying a theoretical foundation for further research on the energy absorption performance of honeycomb structures.
THIN-WALLED STRUCTURES
(2021)
Article
Geochemistry & Geophysics
A. El-Sharkawy, T. Meier, C. Huebscher, S. Lebedev, A. Dannowski, H. Kopp, J. H. Behrmann, A. McGrandle, M. Hamada
Summary: The study reveals the complex geologic structures in the eastern Mediterranean, including typical oceanic and continental lithosphere. Significant differences exist in the crustal thickness and properties between the two basins, providing crucial insights into the evolution of the Earth's lithosphere.
Article
Geosciences, Multidisciplinary
Claudia Cruz, Pedro Nogueira, Jaime Maximo, Fernando Noronha, Helena Sant'Ovaia
Summary: The Santa Eulalia Plutonic Complex consists of two main granites, G0 and G1. The geological complexity of the area, along with Variscan structures and faults, makes it challenging to determine the emplacement mechanism of the pluton. However, a proposed model suggests a west-east magmatic axis and the involvement of extensional fractures in the ascent and emplacement of the plutonic rocks.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
J. Diaz, I DeFelipe, M. Ruiz, J. Andres, P. Ayarza, R. Carbonell
Summary: The analysis of background noise in seismic networks is a powerful tool for studying crustal structure and monitoring natural and human-induced processes. This study demonstrates the usefulness of data from controlled source experiments, especially with high-density deployments, in monitoring such processes. Using wide-angle reflection and refraction seismic profile data in the central-northwest part of Iberia, various signals related to aircrafts, road traffic, quarry blasts, wind blow, rainfall, and thunder are identified. Notably, signals generated by a helicopter and an airplane flying parallel to the profile are observed along a 200 km distance with a spatial resolution of 350 m, providing exceptional dataset.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Handoyo Handoyo, Juan Alcalde, Irene DeFelipe, Imma Palomeras, Raquel Martin-Banda, Julian Garcia-Mayordomo, David Marti, Jose J. Martinez-Diaz, Juan Miguel Insua-Arevalo, Teresa Teixido, Ignacio Marzan, Ramon Carbonell
Summary: This study focuses on characterizing the thickness and lateral variations of the critical zone (CZ) in the Eastern Betic Shear Zone (EBSZ) using interdisciplinary geophysical methods. The results help interpret the shallow subsurface structure and reveal the relationships between the CZ thickness, fault zone, topographic slope, and geological units. These findings enhance the understanding of the shallow subsurface of active faults and improve CZ assessment in tectonically active regions.
APPLIED SCIENCES-BASEL
(2022)
Review
Geosciences, Multidisciplinary
Irene DeFelipe, Juan Alcalde, Eldar Baykiev, Isabel Bernal, Kittiphon Boonma, Ramon Carbonell, Stephanie Flude, Arnau Folch, Javier Fullea, Daniel Garcia-Castellanos, Adelina Geyer, Santiago Giralt, Armand Hernandez, Ivone Jimenez-Munt, Ajay Kumar, Maria-Gema Llorens, Joan Marti, Cecilia Molina, Andres Olivar-Castano, Andrew Parnell, Martin Schimmel, Montserrat Torne, Sergi Ventosa
Summary: The significant advances in computer power have greatly impacted Earth science, allowing for the simulation and improved forecasting of natural processes. The development of a collection of geoscientific software and code promotes the integration of different Earth system models and aims to bridge the gap between science and society.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Hongqiang Li, Xingfu Huang, Rui Gao, Ramon Carbonell, Lei Gaol
Summary: This study investigates the transformation of cratonic lithospheric mantle during decratonization in the North China Craton. High-resolution seismic reflection transect reveals the coexistence of two lithospheric mantles with different reflection characteristics, as well as channel-like structures within the mantle, which provide possible pathways for the rise of melts and fluids and enable the modification of the cratonic lithospheric mantle.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
I DeFelipe, P. Ayarza, I Palomeras, M. Ruiz, J. Andres, J. Alcalde, D. Martinez Poyatos, F. Gonzalez Lodeiro, M. Yenes, J. Elez, I Perez-Caceres, M. Torne, R. Carbonell
Summary: Intraplate ranges are topographic features that can occur far from plate boundaries. We focused on the Spanish-Portuguese Central System (SPCS) and provided a P-wave velocity model based on seismic data. Our study revealed an asymmetric crust-mantle boundary, the extent of a Variscan batholith, and thinning of the lower crust. The deformation mechanisms of the crust seem to be controlled by the presence of late- to post-Variscan granitoids.
Article
Environmental Sciences
Joaquin Escayo, Ignacio Marzan, David Marti, Fernando Tornos, Angelo Farci, Martin Schimmel, Ramon Carbonell, Jose Fernandez
Summary: This study analyzes the deformation field in the Riotinto mine, Spain and proposes a new method for combining ascending and descending results. It demonstrates the great potential of the Sentinel-1 satellite as a monitoring tool in mining environments.
Article
Geosciences, Multidisciplinary
Maurizio Ercoli, Filippo Carboni, Assel Akimbekova, Ramon Bertran Carbonell, Massimiliano Rinaldo Barchi
Summary: The legacy seismic reflection data have great value for basic research, especially in seismically hazardous areas. Modern tools, such as pre-conditioning techniques and seismic attributes, can effectively improve the data quality and resulting image. In this study, a workflow including pre-conditioning and extraction of seismic attributes is used to improve the quality of CROP-04 deep seismic reflection profile in the Southern Apennines mountain range. The results demonstrate the capacity of this method to extract seismic fabrics and identify fault sets, which can be useful in seismotectonic studies of other high-hazard regions.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geochemistry & Geophysics
Clare E. Bond, Juan Alcalde, Robert W. H. Butler, Ken McDermott, Ramon Carbonell
Summary: This article analyzes seismic image interpretations of the passive margin offshore East India by 17 groups of geoscientists. The findings show differences in interpreting continent-ocean boundaries and transition zones, but the placement of the boundary line falls within the range of interpreted transition zones. Comparisons with published interpretations also support these findings. These results have implications for passive margin models and the use of Wisdom of Crowds-type approaches.
Article
Environmental Sciences
Luca Dal Zilio, Domenico Giardini, Ramon Carbonell, Stefan Wiemer
Summary: Digital twins, as virtual replicas of natural systems, are promising tools for assessing seismic hazard, aiding disaster decision-making, and earthquake rapid response. However, the challenges of exascale computing need to be tackled to create adaptable systems capable of meeting evolving earthquake dynamics.
NATURE REVIEWS EARTH & ENVIRONMENT
(2023)
Article
Geochemistry & Geophysics
Hongqiang Li, Ramon Carbonell, Rui Gao, Xingfu Huang, Jie Zhang, Xiaofan Deng, Lei Gao, Hongkai Liu, Hesheng Hou
Summary: The Xiong'an New Area in China serves as a research facility for geothermal energy development. Through seismic reflection and magnetotelluric sounding analysis, the lithospheric structure and geothermal features of the area were studied. The findings include lithospheric gneiss domes, fluid channels, and deep-seated plutons, which are likely to be the primary heat sources in this region.