Results 211 to 220 of about 11,155 (262)
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A clay grouting technique for granitic rock adjacent to clay bulkhead
Physics and Chemistry of the Earth, Parts A/B/C, 2007Abstract Excavation and re-distribution of the stress around the tunnel lead to the development of an excavation damage zone (EDZ). While the bulkheads are keyed into the rock wall of the tunnel to act as cut-offs for the EDZ of the tunnel, clay grouting was conducted around the clay bulkhead as an additional measure to interrupt the connectivity of ...
K. Masumoto +5 more
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Chemical Conditions in Clay-Rocks
2015Abstract Until the end of the 1990s, deep geological clay formations had no direct industrial applications and little research had been conducted to characterize the chemistry of pore-water in indurated clay-rocks. The emergence of the concept of radioactive waste disposal in clay-rock formations led to a research boom in this area.
Christophe Tournassat +3 more
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Rock-physics templates for clay-rich source rocks
Geophysics, 2015ABSTRACT Shale source rocks are composed of various minerals, mainly smectite and illite, depending on the burial depth, and they can be described as transversely isotropic media. The “pore space” may contain kerogen, water, oil, and gas determined by the in situ conditions.
José M. Carcione, Per Avseth
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Effect of the local clay distribution on the effective electrical conductivity of clay rocks [PDF]
Journal of Geophysical Research: Solid Earth, 2015 Abstract The “local porosity theory” proposed by Hilfer was revisited to develop a “local clay theory” (LCT) that establishes a quantitative relationship between the effective electrical conductivity and clay distribution in clay rocks.
Philippe Cosenza, M Zamora
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Clay Minerals in the Cretaceous Rocks of Florida
Geological Society of America Bulletin, 1971The clay minerals in the Cretaceous carbonate rocks of southern Florida, 7,000 to 10,000 ft thick, should be of value in interpreting the tectonic history of the Caribbean region. The Upper Cretaceous is characterized by montmorillonite and the Lower Cretaceous by illite.
CHARLES E. WEAVER, RALPH G. STEVENSON
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Origin of clay films in rock salt
Sedimentary Geology, 1985Abstract It has long been assumed that thin but pervasive clay intercalations in evaporite deposits of salt and potash represent “freshening” of the brine body, i.e. dilution by fresh or low-salinity water. However, a corresponding amount of coarser clastics is not present: sandy halites are extremely rare, sandy potash beds are unknown.
P. Sonnenfeld, P.P. Hudec
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Isotope Geochemistry of Clays and Clay Minerals from Sedimentary Rocks
1995Authigenic clay minerals are records of a long and complex history of the sediments since their deposition. These minerals can be broadly classified as either syn-depositional or post-depositional, but the distinction between them in an ancient sedimentary rock is not always easy.
Norbert Clauer, Sambhu Chaudhuri
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1997
Abstract Rocks and cohesive clays form a high proportion of the world’s coasts, and even many sand and coarse elastic beaches are underlain by shore platforms and backed by marine cliffs. These coasts have been neglected in the contemporary processoriented coastal literature, where the emphasis has been on beaches and other coastal ...
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Abstract Rocks and cohesive clays form a high proportion of the world’s coasts, and even many sand and coarse elastic beaches are underlain by shore platforms and backed by marine cliffs. These coasts have been neglected in the contemporary processoriented coastal literature, where the emphasis has been on beaches and other coastal ...
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Using clay rock in smelting ferrosilicoaluminum
Steel in Translation, 2008The possibility of smelting ferrosilicoaluminum (57–60% Si, 28–35% Al) from high-ash (≥65%) waste clay rock is considered. Additions of high-ash coal make up for the shortage of reducing agent.
S. O. Baisanov +4 more
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On damage modelling in unsaturated clay rocks
Physics and Chemistry of the Earth, Parts A/B/C, 2008The aim of this paper is to present the main problems encountered in the modelling of damage in an unsaturated quasi-brittle rock mass. Micromechanical damage models are based on a physical definition of damage, related to fracturing. Phenomenological formulations are less straightforward, but offer huge modelling possibilities by means of economical ...
Arson, Chloé, Gatmiri, Behrouz
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