Article
Engineering, Geological
Leonardo Hax Damiani, Georg Kosakowski, Agnes Vinsot, Sergey Churakov
Summary: The Hydrogen Transfer experiment conducted at the Mont Terri underground rock laboratory in Switzerland is an in situ study that investigates the interaction and transport of injected hydrogen in Opalinus Clay, a type of claystone formation. A Python-based model was developed to analyze and simulate the experiment's data, including the diffusion of dissolved gases and solutes in claystone pore water, thermodynamic modeling of gas-water-solid phase equilibria, and simulations of chemical equilibria and reaction kinetics. The model accurately reproduces the temporal changes in gas pressure, composition, and solute concentrations measured in situ. The effective diffusion coefficients for dissolved gases in Opalinus Clay derived from the modeling closely match measurements from other experimental studies. The study highlights the importance of accurately describing the temporal variations in hydrogen injection and inflow of formation water for modeling microbially mediated hydrogen consumption in the injection interval.
ENVIRONMENTAL GEOTECHNICS
(2022)
Review
Geosciences, Multidisciplinary
Jack F. Ward, Gideon Rosenbaum, Teresa Ubide, Jonny Wu, John T. Caulfield, Mike Sandiford, Derya Guerer
Summary: Studies have shown that intraplate volcanoes in East Asia are likely formed by decompression melting associated with convective upwellings at the edges of the Pacific and Philippine Sea slabs, rather than mantle plume activity or typical subduction zone slab metasomatism. The Quaternary rollback of the Philippine slab may also be responsible for volcanic activity at Jeju, located at the leading edge of the Philippine Sea slab.
EARTH-SCIENCE REVIEWS
(2021)
Article
Construction & Building Technology
Z. H. Xu, T. F. Yu, P. Lin, W. Y. Wang, R. Q. Shao
Summary: This study developed a method for fault identification through integration of microstructural, geochemical, and mineralogical characteristics of rocks, and applied it to a specific engineering project for geological analysis. The results provide evidence for fault-induced geochemical effects and mineral transformations, and successfully identified the fault and obtained evidence of weakened mechanical properties of the fault rocks.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Geosciences, Multidisciplinary
M. E. Silva, F. C. C. Nogueira, Y. A. R. Perez, D. L. Vasconcelos, R. C. Stohler, J. C. D. Sanglard, F. Balsamo, F. H. R. Bezerra, B. R. B. M. Carvalho, J. A. B. Souza
Summary: In this study, deformation band frequency data was used to delimit and model fault damage zone subdomains and fault facies in the hanging wall of the Malta Fault segment in Brazil. The results showed that permeabilities of deformation bands and interband spaces increase non-uniformly towards the protolith due to differences in deformation intensity, with significant reductions compared to undeformed rocks in inner and outer damage zones.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Computer Science, Interdisciplinary Applications
Hui Wang, Remi de la Vaissiere, Minh-Ngoc Vu, Christian La Borderie, Domenico Gallipoli
Summary: This paper investigates the excavation damage zone surrounding an underground tunnel/gallery and its evolution for the performance assessment of a radioactive waste underground repository. Through numerical analysis and experimental validation, the study focuses on the self-sealing mechanism and demonstrates the reliability of the proposed model in accurately describing the self-sealing of fractured COx claystone.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Geosciences, Multidisciplinary
Jian Yi, Pujun Wang, Xuanlong Shan, Guido Ventura, Chengzhi Wu, Jiannan Guo, Pencheng Liu, Jiahui Li
Summary: Changbaishan is an intraplate volcano with a complex plumbing system consisting of magma reservoirs at different depths. Its eruption activity has gone through different stages, including shield volcano, cone-construction, and caldera-forming stages. The evolution of the volcano's plumbing system is controlled by the layering of the crust, and the depth of the magma storage zones is determined by this layering.
GEOSCIENCE FRONTIERS
(2021)
Article
Engineering, Environmental
Peng Lin, Tengfei Yu, Zhenhao Xu, Ruiqi Shao, Wenyang Wang
Summary: This study presents a case study of TBM jamming caused by faults in a tunnel project. Through comprehensive analysis of the geological characteristics of fault rocks, it is found that the geochemical effects and long-term tectonic stresses play a major role in weakening the rock structure. The presence of mylonitization and cataclastic breccia fabrics further adds to the weakness of the fault rocks. The study provides engineering measures and recommendations to avoid similar accidents.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Geochemistry & Geophysics
Zhi Chen, Ying Li, Zhaofei Liu, Hongyi He, Giovanni Martinelli, Chang Lu, Zihan Gao
Summary: This study investigates fluid geochemistry in the active fault zones of the North China Craton, revealing higher gas emissions in the northeastern Tibetan Plateau and the Zhang-Bo seismic zone. The analysis suggests the presence of new fractures and a potential magmatic intrusion derived from the mantle. In other seismic zones, crust-derived gas is detected along with a negligible mantle-derived component, indicating the occurrence of additional fractures in these areas.
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)
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)
Article
Engineering, Geological
Hui Wang, Qinxi Dong, Remi de la Vaissiere, Minh-Ngoc Vu, Christian La Borderie, Domenico Gallipoli, Huan Sun
Summary: This study focuses on the performance assessment of a high radioactive waste underground repository. The self-sealing process of the excavation induced damage zone is analyzed through numerical modeling. The proposed model accurately depicts the self-sealing of the fractured claystone, showcasing its usefulness in evaluating the performance of nuclear waste disposal.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Qinyi Zhang, Daidai Wu, Guangrong Jin, Xing Xu, Chao Yang, Lihua Liu
Summary: This study reveals a stable methane seep in the Shenhu area of the South China Sea through detailed geochemical and mineralogical analyses. The results show that organoclastic sulfate reduction is predominant in shallow sediments, while sulfate reduction coupled with anaerobic oxidation of methane occurs in deeper sediments. The study also identifies the position of the sulfate-methane transition zone and suggests its relative stability since the end of the Last Glacial Period.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
L. C. V. Lucas, D. L. Vasconcelos, F. Balsamo, M. E. Silva, F. C. C. Nogueira, R. C. Stohler, F. H. R. Bezerra, G. B. Honorio, M. A. Nicchio, I. C. Vaz, J. A. B. Souza
Summary: Analyzing the factors affecting fault damage zone parameters and the impact of deformation on host rock permeability is crucial for predicting fluid flow behavior in subsurface reservoirs. This study combines seismic data, field-based analyses, and petrophysical studies to determine how the geometry of a basin boundary fault influences damage zone thickness, deformation band distribution, and permeability. The research reveals complexity in the fault geometry and subsidiary structures, highlighting the effect of fault tip interaction on deformation bands and permeability distribution.
JOURNAL OF STRUCTURAL GEOLOGY
(2023)
Article
Energy & Fuels
Lukas Seib, Bastian Welsch, Claire Bossennec, Matthis Frey, Ingo Sass
Summary: Solutions for seasonal energy storage systems are crucial for utilizing fluctuating renewable energy sources. A research project in Germany is constructing a medium deep borehole thermal energy storage system to demonstrate this technology, and investigations suggest that the system is mildly affected by a fault zone, resulting in a 3% impairment in storage efficiency.
Article
Geochemistry & Geophysics
Hongyi He, Zhi Chen, Zhaofei Liu, Zihan Gao, Le Hu, Chang Lu, Junjie Shao, Ying Li
Summary: It is confirmed that soil gas geochemistry, including Rn and CO2 fluxes, can serve as reliable indicators for fault activity. In this study, the relationships among soil gas Rn and CO2 fluxes, hydrochemistry of hot springs, and fault activity along the Xiaojiang Fault Zone in SW China were thoroughly investigated. The results indicate that the types of hot spring water were affected by the interactions with groundwater and carbonate rocks. The concentrated distribution of relatively high soil gas Rn and CO2 fluxes in the northern and southern segments of the fault zone corresponded with the spatial distribution of seismic activities and fault slip rate.
APPLIED GEOCHEMISTRY
(2023)