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  • 1
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    Unknown
    (Table 1) Physical properties of sediments at DSDP Leg 86 Holes
    PANGAEA
    In:  Supplement to: Schultheiss, P J (1985): Physical and geotechnical properties of sediments from the Northwest Pacific: Deep Sea Drilling Project Leg 86. In: Heath GR; Burckle LH; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 86, 701-722, https://doi.org/10.2973/dsdp.proc.86.133.1985
    Details
    Publication Date: 2023-06-27
    Description: A wide variety of sediment types (red clays, carbonate oozes, and siliceous clays) were cored using the hydraulic piston corer on Leg 86 of the Deep Sea Drilling Project in the Northwest Pacific. Physical property data for all these sediments are presented in the form of tables and graphs. Measurements include bulk density, water content, gamma ray attenuation porosity evaluation (GRAPE), shear strength, compressional and shear wave velocities, consolidation, and permeability. Sample quality for the most part was considered good; however, some systematic downcore disturbance was found in the red clays. A significant difference between shipboard and shore-based gravimetric measurements was found and was correlated with sea state. The siliceous clays exhibited little progressive consolidation downhole, whereas the red clays were found to be normally consolidated below 20 m. Vane shear strengths ranged from zero to 1700 g/cm**2 in red clay at a sub-bottom depth of 170 m. Shear wave velocity correlated with vane shear strength and ranged up to 160 m/s in the red clay.
    Keywords: 86-576; 86-576B; 86-577; 86-577A; 86-578; 86-579; 86-579A; 86-580; 86-581; Calculated, see reference(s); Deep Sea Drilling Project; Density, wet bulk; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Gamma-ray attenuation porosity evaluator (GRAPE); Glomar Challenger; Latitude of event; Leg86; Longitude of event; North Pacific; Porosity, fractional; Sample code/label; see reference(s); Shear strength; Torvane; Velocity, compressional wave; Velocity, shear wave; Void ratio; Water content, wet mass; Wykeham Farrance motorized vane device
    Type: Dataset
    Format: text/tab-separated-values, 3302 data points
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    DATA PANGAEA
  • 2
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    Annotated record of the detailed examination of Mn deposits from the Great Meteor Seamount (1984)
    PANGAEA
    In:  Institute of Oceanographic Sciences, Wormley
    Details
    Publication Date: 2023-08-28
    Description: The main objective of the cruise was to study the sediments and sedimentary processes in an area known as Great Meteor East (GME) - part of a feasibility study into the ocean disposal of high-level radioactive waste commissioned by the Department of the Environment. Previous cruises (Discovery 118, 126, 134 and Farnella 3/81) had done much of the ground work, consequently the area was already well known but not necessarily well understood for the purposes of our investigation.
    Keywords: Atlantic Ocean; D144; D1979; Deposit type; DEPTH, sediment/rock; Description; Discovery (1962); Dredge; DRG; Identification; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 6 data points
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    DATA PANGAEA
  • 3
    Electronic Resource
    Electronic Resource
    Direct indication of pore-water advection from pore pressure measurements in Madeira Abyssal Plain sediments (1986)
    [s.l.] : Nature Publishing Group
    Nature 320 (1986), S. 348-350 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Pore pressure measurements in soils and sediments provide an essential component in the evaluation of the effective stress condition which governs the material behaviour. The effective stress is given by cr' = a - u, where cr is the total stress and u is the pore pressure. Thus pore pressure ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/320348a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Modelling radioactive waste disposal by penetrator experiments in the abyssal Atlantic Ocean (1984)
    [s.l.] : Nature Publishing Group
    Nature 310 (1984), S. 130-133 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The GME area lies in the southwestern distal part of the Madeira Abyssal Plain (Fig. 1). Extensive geological and geophysical studies have been carried out there by the Rijks Geologische Dienst of the Netherlands and by the UK Institute of Ocanographie Sciences7"11. The sediments found there ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/310130a0
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Vertical open burrows in deep-sea sediments 2 m in length (1983)
    [s.l.] : Nature Publishing Group
    Nature 301 (1983), S. 329-331 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The open burrows were observed on fracture surfaces of two Kastenlot2 gravity cores taken on the Madeira abyssal plain (Tables 1, 2). The corer, a 4-m long square box, is known to recover sediments with a minimum of disturbance. Each core consists of a thick calcareous clay unit (distal pelagic ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/301329a0
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  • 6
    Electronic Resource
    Electronic Resource
    Current methods for obtaining, logging and splitting marine sediment cores (1990)
    Springer
    Marine geophysical researches 12 (1990), S. 85-100 
    Details
    ISSN: 1573-0581
    Keywords: coring devices ; box corer ; gravity corer ; piston corer ; grant piston corer ; ‘P’ wave log ; wholecore logging ; kevlar, warp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The main types of deep-sea sediment coring devices are described and their relative merits and drawbacks are discussed. These devices include box corers, gravity corers, piston corers, giant piston corers and vibrocorers. Recent utilisations of kevlar and polyester coring warps are also discussed, since these are the only warps capable of handling the large weights associated with the larger devices. Recent developments in wholecore logging, including ‘P’ wave, density and magnetic susceptibility, are described as are methods of subcoring and core splitting to obtain the maximum amount of detail on the split surfaces. The wholecore logs together with a good colour photograph of the recently split sediment surface provide a lasting unambiguous record of the core.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310565
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  • 7
    Electronic Resource
    Electronic Resource
    Pore pressures in marine sediments: An overview of measurement techniques and some geological and engineering applications (1990)
    Springer
    Marine geophysical researches 12 (1990), S. 153-168 
    Details
    ISSN: 1573-0581
    Keywords: in-situ measurements ; pore pressure ; marine sediments ; measurement techniques ; hydrology ; sediment properties ; effective stress ; geotechnical
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Pore pressures in the seabed are extremely sensitive to any imposed stress because of the low permeabilities commonly exhibited by marine sediments. Consequently, the measurement of sediment pore pressures can be used to infer either the nature of the imposed stress (if the sediment properties are known) or the physical properties of the sediment (if the imposed stresses are known). Stresses of many different types may be exerted on the seabed either through hydrostatic forces (e.g. tidal and wave effects), or directly by lithospheric forces (e.g. tectonic and thermal forces). Several techniques for measuring in situ pore pressures in the upper few metres of sediments have been developed, and one instrument, the PUPPI, will operate autonomously in water depths up to 6000 m. Basic sediment properties and processes can already be inferred from pore pressure responses using this technique. However, further application and development could greatly enhance its capability, especially for long-term monitoring of sediment conditions. In this Chapter, pore pressure measurement techniques are briefly reviewed and problems are highlighted. An outline is given of some of the many ways in which pore pressure measurements could be used to gain further insight into geological processes and to determine some of the pertinent sediment properties more accurately for engineering applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310570
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  • 8
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    Rapid non-contacting resistivity logging of core (2007)
    In:  Geological Society Special Publication 267: 209-217.
    Details
    Publication Date: 2007-10-08
    Description: We demonstrate a non-contact approach to whole-core and split-core resistivity measurements, imaging a 15 mm-thick, dipping, conductive layer, producing a continuous log of the whole core and enabling the development of a framework to allow representative plugs to be taken, for example. Applications include mapping subtle changes in grain fabric (e.g. grain shape) caused by variable sedimentation rates, for example, as well as the well-known dependencies on porosity and water saturation. The method operates at relatively low frequencies (i.e. low induction numbers), needing highly sensitive coil pairs to provide resistivity measurements at the desired resolution. A four-coil arrangement of two pairs of transmitter and receiver coils is used to stabilize the measurement. One coil pair' acts as a control, enabling the effects of local environmental variations, which can be considerable, to be removed from the measurement at source. Comparing our non-contact approach and independent traditional galvanic' resistivity measurements indicates that the non-contact measurements are directly proportional to the reciprocal of the sample resistivity (i.e. conductivity). The depth of investigation is discussed in terms of both theory and practical measurements, and the response of the technique to a variety of synthetic structures' is presented. We demonstrate the potential of the technique for rapid electrical imaging of core and present a whole-core image of a dipping layer with azimuthal discrimination at a resolution of the order of 10 mm. Consequently, the technique could be used to investigate different depths within the core, in agreement with theoretical predictions.
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    PAPER
  • 9
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    Pressure coring, logging and subsampling with the HYACINTH system (2007)
    In:  Geological Society Special Publication 267: 151-163.
    Details
    Publication Date: 2007-10-08
    Description: The HYACINTH suite of equipment has been developed to investigate the pressure sensitive behaviour of sedimentary formations up to 250 bar (25 MPa). It does this by collecting pressure-preserved samples from boreholes that can be retrieved, subsampled and analysed in controlled conditions in the laboratory. This paper reviews the development of the system, how it originated from the need to better understand the nature and distribution of gas hydrates beneath the sea bed, and its achievements to date. While gas hydrates continue to be the major scientific and commercial impetus for using, and further developing, this pressure-sampling technology, other important scientific driving forces, including the growing interest in the deep biosphere beneath the sea floor, are playing an important role. We review the downhole tools, the transfer system and the suite of different pressure chambers that are required to make a complete working system. Non-destructive logging of cores contained in pressure chambers, using existing gamma- and X-ray techniques, is discussed, as are future logging techniques that will have sensors embedded within the pressure chambers. Subsamples can now be taken at full pressure and transferred into specialized chambers where intrusive measurements and experiments can be performed (e.g. inoculation chambers for microbiology). The versatile philosophy behind the integrated systems will enable future developments to be made by third parties who want to obtain subsamples at in situ pressure from the HYACINTH system. We conclude by reviewing some of the highlights of the HYACINTH operations on ODP Leg 204 where the downhole tools retrieved cores containing gas hydrates (up to 40% by volume) that were subsequently logged on board in the laboratory. These data have already contributed to the scientific understanding of the nature and distribution of gas hydrates beneath the seabed in one area on the Oregon Margin off the USA.
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  • 10
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    Current methods for obtaining, logging and splitting marine sediment cores (1990)
    Springer
    Details
    Publication Date: 1990-05-01
    Print ISSN: 0025-3235
    Electronic ISSN: 1573-0581
    Topics: Geosciences , Physics
    Published by Springer
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    PAPER CURRENT
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