Results 1 to 10 of about 105,403 (172)

Tunnels in squeezing clay-rich rocks

Underground Space, 2021
Squeezing ground conditions, which can lead to severe loads in tunnels, have historically been associated with the presence of clay minerals in the ground.
Ketan Arora, Marte Gutierrez, Ahmadreza Hedayat, Caichu Xia   +3 more
doaj   +3 more sources

Viscous Behavior of Clay‐Rich Rocks and Its Role in Focused Fluid Flow [PDF]

Geochemistry, Geophysics, Geosystems, 2021
Focused fluid flow is common in sedimentary basins worldwide, where flow structures often penetrate through sandy reservoir rocks, and clay‐rich caprocks.
Viktoriya M. Yarushina, Roman Y. Makhnenko, Yuri Y. Podladchikov, L. Hongliang Wang, Ludovic Räss   +4 more
doaj   +5 more sources

Experimental study on the effect of thermal treatment on the mechanical properties of clay-rich rocks (mudstone)

Results in Engineering, 2022
Temperature is one of the most important environmental factors that affect rock engineering properties. The clay-rich rocks such as mudstone are abundant in the earth's crust and have a high affinity to water.
Abdel Kareem Alzo'ubi, Mahmoud Alneasan
doaj   +2 more sources

Shallow movements in clay rich rocks detected during subnormal percipitation period [PDF]

Acta Geodynamica et Geomaterialia, 2019
The paper aims at the evaluation of the landslide movement monitoring near Třebenice town in the České středohoří hilly land, Czechia. The monitored period between May of 2017 and January 2019 is characterized by negative effective precipitations and ...
J. Balek
openaire   +2 more sources

Importance of Interlayer Equivalent Pores for Anion Diffusion in Clay-Rich Sedimentary Rocks [PDF]

Environmental Science & Technology, 2017
The anion exclusion behavior in two different clay stones, Opalinus Clay (OPA) and Helvetic Marl (HM), was studied using a well-established experimental through-diffusion technique. The ionic strength of the pore water was varied between 0.01 and 5 M to evaluate its effect on the diffusion of HTO and 36Cl-.
Cornelia Wigger, Luc R. Van Loon
openaire   +3 more sources

Anion diffusion in clay-rich sedimentary rocks – A pore network modelling

Applied Clay Science, 2018
Mass transport in compacted clays is predominantly by diffusion, making them preferred candidates for barriers to radionuclide transport in future repositories for nuclear waste. Diffusivity of species depends on a number of factors: (1) the physical and chemical properties of the clay, such as the geometry and topology of the pore space and the ...
Qingrong Xiong, Andrey P. Jivkov
openaire   +3 more sources

Alteration history of aluminum-rich rocks at Jezero crater, Mars. [PDF]

Commun Earth Environ
Aluminum-rich clay minerals are detected across the ancient surface of Mars and record intervals of intense alteration by liquid water. On Earth, these clay minerals can form from hydrothermal alteration or rainfall-driven chemical weathering over ...
Broz AP, Horgan BHN, Bedford C, Royer C, Manelski H, Connell S, Wiens RC, Cardarelli EC, Madariaga JM, Mandon L, Klidaras A, Bramble M, Kathir B, Forni O, Carter J, Dehouck E, Quantin-Nataf C, Johnson JR, Nuñez JI, Hausrath E, Wolf U, Cloutis EA, Beck P, Bell JF, Simon JI, Cousin A.   +25 more
europepmc   +2 more sources

Importance of Water-Clay Interactions for Fault Slip in Clay-Rich Rocks

Journal of Geophysical Research: Solid Earth
Clay-rich rocks are integral to subduction zone dynamics and of practical importance, for example, as barriers in nuclear waste and CO2 repositories. While the effects of swelling strain on the self-sealing capabilities of these rocks are relatively well-established, the implications of polar fluids interacting with charged clay particles on the ...
Rast, Markus, Madonna, Claudio, Selvadurai, Paul Antony; id_orcid0000-0002-3846-8333, Wenning, Quinn; id_orcid0000-0002-6042-6295, Ruh, Jonas B.   +4 more
semanticscholar   +4 more sources

Water-induced softening behavior of clay-rich sandstone in Lanzhou Water Supply Project, China

Journal of Rock Mechanics and Geotechnical Engineering, 2020
The strength of clay-rich sandstone decreases significantly when in contact with water due to softening effects. This scenario can pose a severe threat to the stability of water diversion tunnels during construction and operation periods.
Muhammad Usman Azhar, Hui Zhou, Fanjie Yang, Adnan Younis, Xinjing Lu, Houguo Fang, Yijun Geng   +6 more
doaj   +2 more sources

Changes in continental weathering regimes inhibited global marine deoxygenation during the Paleocene-Eocene thermal maximum. [PDF]

Nat Commun
The moderate impact of rapid global warming on oceanic redox and biodiversity during the Paleocene-Eocene thermal maximum (PETM; ~55.9 Ma) contrasts with other hyperthermal events in Earth’s history, and remains mostly unexplained.
Wei GY, Pohl A, Jiang S, Zhang H, Wang W, A E Pogge von Strandmann P, Maffre P, Xiong G, Shen SZ, Zhang F.   +9 more
europepmc   +2 more sources