Electro-osmotic core cutting

Chmelik, Frank B.

doi:10.1016/0025-3227(67)90101-6

Cited by 22 publications

(6 citation statements)

References 1 publication

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“…However, owing to segment thickness and cylindricality the X-ray images were often cloudy. To improve resolution, 4-mm slices were electro-osmotically cut (Chmelik, 1967;Carter & Hunt, 1974) from selected samples.…”

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Sedimentary structures and sediment transport across the continental slope of Israel from piston core studies

Almagor¹,

Schilman²

1995

Sedimentology

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The continental terrace of Israel consists of Nile‐derived sediments. They are classified into three major groups, according to their structures: (1) irregularly to wavy laminated, coarse‐grained sediments (quartz and skeletal debris) of the flat outer shelf and upper bend of the slope (10–20% of the bulk) which are influenced by currents. These sediments are bioturbated to various degrees. Smectitic silty clays (80–90%) form two structural groups: (2) laminated, turbiditic sediments which accumulate on the slope, particularly in the canyons of the northern slope. Irregular, wavy, thickly laminated, coarse‐grained sediments of the upper slope and canyon heads merge downslope with parallel, thinly laminated, fine‐grained sediments. Toward the foot of the slope and on the adjacent deep‐sea floor lamination becomes indistinct and the sediment is visually homogeneous. (3) Slump‐generated mud lumps of various size which accumulate on the lower slope and along the transport axes of the canyons. These are the most visible evidence for large‐scale slumping mass movement. Transportational and depositional processes are far more intensive over the steep northern continental slope of Israel, and especially in its canyons than over the gentle southern slope. Very stiff overconsolidated sediments unconformably overlain by the ubiquitous recent silty‐clayey sediment were cored on steep sections of the middle continental slope and along the canyon walls. Their preconsolidation stress values suggest that these sections were formerly overlain by more than 40 m of sediment and now are exposed by slumping. The downsliding slabs usually disintegrated into small fragments although several huge fragments could be identified along the canyon axes.

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Sedimentary structures and sediment transport across the continental slope of Israel from piston core studies

Almagor¹,

Schilman²

1995

Sedimentology

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“…The clay was positioned into oriented cylindrical plastic tubes of standard dimension (2.5 x 2.2 cm) by gently pressing them into the clay using electrolytical equipment (electro-osmosis;Chmelik, 1967) that cuts the clay dispersion without destroying the microfabric (Fig. 1).…”

Section: Sample Preparationmentioning

confidence: 99%

Magnetic fabrics of experimentally deformed artificial clay-water dispersions

1992

International Journal of Rock Mechanics and Mining Sciences &am

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The magnetic fabrics of experimentally deformed clay-water dispersions. Tectonophysics, 2001 143-155. The development of magnetic fabrics in artificial clay-water dispersions and natural, hematite-bearing mudstones is investigated in plane-strain pure shear Iaborato~ experiments under strain rates of 1.6 X lo-' and 2 X 10m4 s-'. The mixtures contain 0,15,30 and 45% chlorite in an illite matrix, and 0, 1,3,6 and 8% magnetite in a kaolin matrix. Shortening up to 40% is imposed. The resulting fabrics show the following characteristics: (1) In the clay mixtures, the principal susceptibility axes (k,,, 2 kin, ;z k,,,) rotate away from the well defined initial fabric orientations into the principal strain directions (e, > e2 2 es) at strains > 30%. (2) Both mineralogical composition and initial magnetic fabric, but not the applied strain, influence the magnitudes of the principal susceptibility axes. (3) The illite-chlorite mixture series show an aimost linear correlation between mineral ~ncent~tion and susceptibility magnitudes. (4) Magnetite dominates the fabric of the magnetite-~olin mixtures; the fabric is'independent of the magnetite ~ncentration. MAGNETlC FABRICS IN ARTIFICIAL CLAY-WATER DISPERSIONS

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“…Once the core sections were cut lengthwise and the archive halves described, samples were selected. In those cases where the sediment was completely unconsolidated, a part of the working half of the core was cleaned with the electro-osmotic knife in order to obtain a smooth, clean surface (Chmelik, 1967;Bouma, 1969). The selected part was then removed from the liner by cutting the upper areas free, filling those cuts with water, placing a strip of plexiglas on that section and removing the part from the liner.…”

Section: Sample Preparationmentioning

confidence: 99%

Sedimentary Structures of Philippine Sea and Sea of Japan Sediments, DSDP Leg 31

Bouma¹

1975

Initial Reports of the Deep Sea Drilling Project, 31

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Sedimentary structures of 101 randomly selected samples from eight holes drilled during DSDP Leg 31 have been studied by visual observation and X-ray radiography. Although some scattering occurs, trends can be established between lithology and the sedimentary structures present. Volcanic conglomerates and conglomeratic sandstones normally do not reveal sedimentary structures. However there is some indistinct arid very indistinct medium and thin bedding in about one third of tliose samples. The sediments are considered to be debris flow deposits. Volcanic ash (sand and pelitic sand) contains numerous sedimentary structures, such as regular and irregular medium and thin bedding and thick and thin lamination, foreset bedding, wedge-shapes and lenticularities, slumping, loadcasts, erosional contacts, and bioturbation. Tuffs and sandstones appear to be homogeneous, while muddy sands and sandy muds can have as many sedimentary structures as the volcanic ashes. Silty clays reveal fewer sedimentary structures, while fine clays and red deep-sea clays contain only some vague thin lamination and evidence of burrowing activity. The shaly sediments from Hole 298 proved to be practically homogeneous. Nannofossil oozes and chalks contain a variety of structures that increase in type and number with increase in clay or fine volcanic ash content. Most sediments except the clays, tuffs, and sandstones show irregularity in deposition, and the sedimentary structures often indicate lateral secondary transport.

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Electro-osmotic core cutting

Cited by 22 publications

References 1 publication

Sedimentary structures and sediment transport across the continental slope of Israel from piston core studies

Sedimentary structures and sediment transport across the continental slope of Israel from piston core studies

Magnetic fabrics of experimentally deformed artificial clay-water dispersions

Sedimentary Structures of Philippine Sea and Sea of Japan Sediments, DSDP Leg 31

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