Article
Geochemistry & Geophysics
Lisa Winhausen, Alexandra Amann-Hildenbrand, Reinhard Fink, Mohammadreza Jalali, Kavan Khaledi, Pooya Hamdi, Janos L. Urai, Joyce Schmatz, Florian Amann
Summary: This paper presents a comparative laboratory study of different methods to determine the water permeability of saturated Opalinus Clay, and found the results obtained by different methods differ less than 15 percent. The pore pressure oscillation technique appears to be the most efficient in terms of experimental handling and data density, providing continuous data on permeability and storativity over a user-defined period of time.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Nicolas Brantut, Franciscus M. Aben
Summary: The new type of transducer is capable of measuring local pore fluid pressure in rock samples under high confining pressure conditions, with high accuracy and flexibility in design. The prototypes show good linearity up to 80 MPa with minimal deviations, and are useful for tracking and quantifying changes in permeability associated with faulting and transient flow in different types of rock.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
M. Soldi, L. Guarracino, D. Jougnot
Summary: Dissolution and precipitation processes alter the structure of porous media, affecting their macroscopic properties. A theoretical model is proposed to estimate the effective excess charge density, which has been validated using experimental data.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
P. Schmidt, N. Dutler, H. Steeb
Summary: In this study, a hydro-mechanical simulation model was proposed to investigate the interaction between fluid flow and fracture deformation under in situ stress conditions. The model was applied to experimental field data and provided insights into the leading mechanisms of flow processes during hydraulic testing. The study emphasized the importance of considering both local and non-local fracture deformation in inverse analysis of hydraulic testing data to improve the understanding of hydro-mechanical flow processes in fractured reservoirs.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Lucas Pimienta, Beatriz Quintal, Eva Caspari
Summary: While hydro-mechanical coupling in rocks explains how fluid-saturated rocks respond to pressure variations, the relationship between properties may not always be straightforward, especially in rocks with different pore types. The interdependence between mechanical and hydraulic properties, which differ based on pore families, can lead to underestimation of rock compressibility in poroelasticity experiments.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Jana H. Boerner, Volker Herdegen, Jens-Uwe Repke, Klaus Spitzer
Summary: Traditional quantification of physical rock properties relies on laboratory analyses, which can be costly and time-consuming for reactive rock-fluid-gas systems. A new methodology based on systematic crushing, multimethod laboratory measurements, and model-based computational evaluation is presented to overcome these challenges.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Alannah C. Brett-Adams, Larryn W. Diamond, Samuel Weber, Samuel A. Gilgen
Summary: This study assesses the porosity and permeability of altered MORB-like basalts in the Semail ophiolite, Oman, and finds that they play a significant role in high-temperature systems. The porosity and permeability of the altered rocks were influenced by rock type and degree of alteration.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
N. Panwar, A. Revil, R. Sharma, M. Schmutz, P. A. Duvillard, B. Garcia, A. Cerepi, R. Garcia-Artigas, P. Vaudelet, E. Malet, S. Jaillet
Summary: The study discusses the complex conductivity measurements of carbonate rocks and presents a simple model of induced polarization. The relationship between the in-phase conductivity, surface conductivity, and normalized chargeability with pore space characteristics is discussed. The results show linear correlations and provide insights into the properties of carbonate formations.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Qiuzi Li, Lang Feng, Stephen D. Cameron, Harry W. Deckman, Deniz Ertas
Summary: The study introduces a theoretical framework that directly relates membrane polarization to intrinsic statistical properties of porous materials, providing a new way to model complex pore structures with a few statistical parameters, and quantifying how different physical processes drive complex conductivity responses in the absence of conducting grains.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
K. Zhang, N. Chibati, A. Revil, J. Richard, M. Gresse, Y. Xue, Y. Geraud
Summary: The petrophysical properties of volcanic samples from La Soufriere volcano in Guadeloupe Island were investigated. The study measured the conductivity spectra, wave velocities, thermal conductivity, specific heat capacity, permeability, cation exchange capacity, and porosity of the rock samples. The relationships between these properties were examined, and a specific example of converting induced polarization survey data into a seismic velocity model was provided. The findings lay the groundwork for joint inversion of seismic and induced polarization surveys for volcanic unrest monitoring.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Adrian Mellage, Gal Zakai, Bar Efrati, Holger Pagel, Nimrod Schwartz
Summary: This study utilizes the geophysical method spectral induced polarization (SIP) to monitor the capacity of soils to immobilize sorbing contaminants. Results show that without solid organic matter (SOM) amendment, soil polarization decreases with increasing sorbed contaminants, exhibiting a leveling-off behavior. The addition of SOM increases the soil conductivity and modifies the dependence between conductivity and sorbed contaminants. The time constant derived from the Cole-Cole model indicates a saturation-type dependence governed by a drop in ion mobility with increasing sorption.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Alejandro Garcia, Emily Asenath-Smith, Dan R. Glaser, Lee Slater
Summary: This study investigates the induced polarization (IP) response of calcite precipitation in different media. The results suggest that the polarization of the electrical double layer surrounding calcite grains is not a significant contributor to IP signals, but under certain circumstances, calcite precipitation can produce a strong IP response.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
F. Hormozzade Ghalati, J. A. Craven, D. Motazedian, S. E. Grasby, E. Roots, V. Tschirhart, Z. Chen, X. Liu
Summary: In this study, the relationship between electrical resistivity and fluid flow in a geothermal reservoir was investigated by combining 3-D resistivity models derived from AMT data with rock properties and fluid sample data. The results showed that 3-D inversion of AMT data can map the fluid pathways at the study site, which are correlated with loss circulation zones in boreholes and can account for a porosity of up to 8.5% and a permeability of approximately 0.249 mD.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geosciences, Multidisciplinary
Jacek Scibek, Irvine R. Annesley
Summary: Through permeability tests conducted at Gryphon U deposit and fault zone, combined with geological and hydrogeological observations, the study revealed the significant impact of rock porosity and permeability on fluid flow and mineral deposit formation. It was also found that coarse gouges in the fault zone are the most permeable and porous, playing a crucial role in the formation of uranium deposits.
NATURAL RESOURCES RESEARCH
(2021)
Article
Geochemistry & Geophysics
L. Friedli, N. Linde, D. Ginsbourger, A. Doucet
Summary: This study explores lithological tomography using the pseudo-marginal method, which involves Monte Carlo sampling and importance sampling to approximate the intractable likelihood of geological parameters. By demonstrating the effectiveness of the correlated PM method and a prior-preserving proposal scheme, the study shows significant improvements in posterior exploration in both linear and nonlinear settings.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Engineering, Geological
Mathieu Le Breton, Laurent Baillet, Eric Larose, Etienne Rey, Philippe Benech, Denis Jongmans, Fabrice Guyoton, Michel Jaboyedoff
ENGINEERING GEOLOGY
(2019)
Article
Geosciences, Multidisciplinary
Graham J. Hill, Hugh M. Bibby, Jared Peacock, Erin L. Wallin, Yasuo Ogawa, Luca Caricchi, Harry Keys, Stewart L. Bennie, Yann Avram
GEOPHYSICAL RESEARCH LETTERS
(2020)
Article
Geochemistry & Geophysics
Qifei Niu, Chi Zhang, Manika Prasad
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Review
Geosciences, Multidisciplinary
Mathieu Le Breton, Noelie Bontemps, Antoine Guillemot, Laurent Baillet, Eric Larose
Summary: Monitoring landslides is crucial for understanding their dynamics and reducing human casualties. The ambient noise correlation method has shown potential in detecting precursor signals before landslide failures, but challenges remain in detecting velocity changes rapidly and confidently, accounting for environmental influences, and ensuring measurement stability. Seasonal velocity fluctuations are influenced by groundwater levels and soil conditions, posing challenges for early-warning systems. Daily fluctuations and spurious velocity changes unrelated to material dynamics should also be considered for accurate landslide monitoring.
EARTH-SCIENCE REVIEWS
(2021)
Article
Environmental Sciences
Jing Xie, Yian Cui, Qifei Niu
Summary: The study evaluates the impact of adding self-potential (SP) data on the estimation of hydraulic properties of soils. Results show that incorporating SP data can reduce uncertainty in estimating hydraulic parameters. Additionally, SP data can also be used to estimate electrical properties of soils, with the saturated streaming potential coupling coefficient C-sat having the highest accuracy.
VADOSE ZONE JOURNAL
(2021)
Article
Environmental Sciences
Taylor Bienvenue, Jing Xie, Qifei Niu
Summary: Geophysical methods are increasingly used to characterize the Earth's critical zone and monitor hydrological processes. This study develops a hydrogeophysical soil column system to measure hydraulic and electrical properties of regolith. The system consists of a hydrogeophysical probe and a cylindrical cell. It can perform both saturated flow and drainage tests, and the measured data can be used to estimate the sample's properties with stochastic hydrogeophysical inversion.
VADOSE ZONE JOURNAL
(2022)
Article
Multidisciplinary Sciences
G. J. Hill, P. E. Wannamaker, V. Maris, J. A. Stodt, M. Kordy, M. J. Unsworth, P. A. Bedrosian, E. L. Wallin, D. F. Uhlmann, Y. Ogawa, P. Kyle
Summary: Erebus volcano in Antarctica is an evolved volcano with a continuous magma structure that is controlled by a structural fault-valve, which controls the flow of magma and CO2 vapor.
NATURE COMMUNICATIONS
(2022)
Correction
Multidisciplinary Sciences
G. J. Hill, P. E. Wannamaker, V. Maris, J. A. Stodt, M. Kordy, M. J. Unsworth, P. A. Bedrosian, E. L. Wallin, D. F. Uhlmann, Y. Ogawa, P. Kyle
NATURE COMMUNICATIONS
(2022)
Article
Environmental Sciences
Arthur Charlety, Mathieu Le Breton, Eric Larose, Laurent Baillet
Summary: This study demonstrates the feasibility of tracking 2D landslide displacements using RFID and an array of antennas. The technique showed centimeter-scale accuracy in horizontal localization and can be implemented and maintained at relatively low cost.
Review
Geosciences, Multidisciplinary
Mathieu Le Breton, Frederic Liebault, Laurent Baillet, Arthur Charlety, Eric Larose, Smail Tedjini
Summary: RFID technology has great potential in geosciences, with applications in monitoring sediment transport, landslide displacement, soil moisture and temperature, snowpack, and more. However, there are challenges to overcome for widespread use, including data collection and localization, improving reading range and duration, using tags in various environments, and optimizing economic and environmental costs.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Mathieu Le Breton, Eric Larose, Laurent Baillet, Yves Lejeune, Alec van Herwijnen
Summary: This study introduces a wireless, non-destructive method for monitoring snow water equivalent (SWE) in a dry snowpack. The method uses passive RFID tags placed under the snow and a reader located above the snow to measure the SWE based on the phase delay of the tag's backscattered response. The results show that the method has scientific-level accuracy and can provide continuous measurements and complementary temperature measurements.
Article
Engineering, Electrical & Electronic
Arthur Charlety, Mathieu Le Breton, Laurent Baillet, Eric Larose
Summary: This paper summarizes the use of passive RFID tags for monitoring landslide surface displacement over the past five years. This method is effective for slow displacements under 1cm per day and offers high spatio-temporal resolution at a relatively low cost. The paper proposes data-processing solutions, including a complex-smoothing unwrapping algorithm, multi-frequency merging operation, and multi-tag and multi-antenna phase combining method, to overcome challenges encountered with long-term outdoor RFID localization. These approaches significantly improve data availability and phase unwrapping, making RFID-based earth surface displacement monitoring a robust and accurate solution.
IEEE JOURNAL OF RADIO FREQUENCY IDENTIFICATION
(2023)
Article
Environmental Sciences
Hang Chen, Qifei Niu, Aida Mendieta, John Bradford, James McNamara
Summary: Hydrologic modeling is a useful approach for studying water partitioning in catchment systems. This study shows the importance of including subsurface heterogeneity in the modeling and proposes a method of incorporating geophysics-obtained subsurface structures. The results demonstrate that this geophysics-informed modeling approach fits field observations well and accurately quantifies key hydrologic fluxes in the catchment.
WATER RESOURCES RESEARCH
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Arthur Charlety, Mathieu Le Breton, Laurent Baillet, Eric Larose
Summary: This paper introduces the application of passive RFID technology in landslide displacement monitoring and summarizes the challenges encountered with the long-term outdoor RFID localization method and the solutions implemented to overcome them.
2022 IEEE 12TH INTERNATIONAL CONFERENCE ON RFID TECHNOLOGY AND APPLICATIONS (RFID-TA)
(2022)
Article
Geochemistry & Geophysics
Hang Chen, Qifei Niu
Summary: Many electrical and electromagnetic methods operate at MHz frequencies, where interfacial polarization in geologic materials may dominate. Pore-scale simulation revealed that packing density and material texture significantly influence interfacial polarization in granular soils. The effective permittivity of granular soils increases with decreasing frequency due to enhanced polarizability from interfacial polarization.