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  • 1
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    Volume of natural gas within gas-hydrate and free-gas occurrences in ODP Leg 164 sites (2000)
    PANGAEA
    In:  Supplement to: Collett, Tim S; Ladd, John W (2000): Detection of gas hydrate with downhole logs and assessment of gas hydrate concentrations (saturations) and gas volumes on the Blake Ridge with electrical resistivity log data. In: Paull, CK; Matsumoto, R; Wallace, PJ; Dillon, WP (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 164, 1-13, https://doi.org/10.2973/odp.proc.sr.164.219.2000
    Details
    Publication Date: 2024-01-09
    Description: Leg 164 of the Ocean Drilling Program was designed to investigate the occurrence of gas hydrate in the sedimentary section beneath the Blake Ridge on the southeastern continental margin of North America. Sites 994, 995, and 997 were drilled on the Blake Ridge to refine our understanding of the in situ characteristics of natural gas hydrate. Because gas hydrate is unstable at surface pressure and temperature conditions, a major emphasis was placed on the downhole logging program to determine the in situ physical properties of the gas hydrate-bearing sediments. Downhole logging tool strings deployed on Leg 164 included the Schlumberger quad-combination tool (NGT, LSS/SDT, DIT, CNT-G, HLDT), the Formation MicroScanner (FMS), and the Geochemical Combination Tool (GST). Electrical resistivity (DIT) and acoustic transit-time (LSS/SDT) downhole logs from Sites 994, 995, and 997 indicate the presence of gas hydrate in the depth interval between 185 and 450 mbsf on the Blake Ridge. Electrical resistivity log calculations suggest that the gas hydrate-bearing sedimentary section on the Blake Ridge may contain between 2 and 11 percent bulk volume (vol%) gas hydrate. We have determined that the log-inferred gas hydrates and underlying free-gas accumulations on the Blake Ridge may contain as much as 57 trillion m**3 of gas.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 2
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    Physical properties, compressional-wave velocity and consolidation characteristics of ODP Holes 133-815B and 133-817B (1993)
    PANGAEA
    In:  Supplement to: Chen, Min-Pen; Juang, Jeng-Shyan; Ladd, John W (1993): Physical properties, compressional-wave velocity, and consolidation characteristics of slope sediments, Townsville Trough, Northeast Australia. In: McKenzie, JA; Davies, PJ; Palmer-Julson, A; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 133, 625-632, https://doi.org/10.2973/odp.proc.sr.133.266.1993
    Details
    Publication Date: 2024-01-09
    Description: Sites 815 and 817 were drilled near the Townsville Trough during Leg 133 of the Ocean Drilling Program. The physical properties, compressional-wave velocity, and consolidation characteristics indicate that the periplatform carbonate sediments maintain more water content and lower compressional velocity near the Queensland Plateau than the clayey hemipelagic sediments, which have a clay content of up to 60%. Bulk density, void ratio or porosity, water content, and compressional-wave velocity are shown to have a linear relationship with burial depth. Between 3.5 and 5 Ma (about 100-500 mbsf), these physical properties maintained a constant rate vs. the depth in core because of the fast sedimentation-rate effect at Site 815. However, compressionalwave velocity still increases downward in this section. The clay content in this section causes an increase of bulk modulus and compaction effect. At Site 817, scarce terrigenous mud content and abundant carbonate content (88%-97%) cause a straight line relationship between physical properties and burial depth. During the consolidation test, we show that dominant micritic particles may cause faster acoustic velocity than sediments composed mainly of coccoliths. The bulk modulus ratio increasing rate in the clay-rich carbonate sediments is almost 4.5 times higher than in the clay-free periplatform carbonate sediments.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 3
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    (Table 2) Grain size analysis of samples from ODP Holes 113-815B and 133-817B (1993)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 133-815B; 133-817B; Coral Sea; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Grain size, mean; Joides Resolution; Kurtosis; Leg133; Mean, standard deviation; Ocean Drilling Program; ODP; Sample code/label; Sand; Silt; Size fraction 〈 0.002 mm, clay; Skewness
    Type: Dataset
    Format: text/tab-separated-values, 80 data points
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    DATA PANGAEA
  • 4
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    (Table 3) Consolidation test results of samples from ODP Holes 113-815B and 133-817B (1993)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 133-815B; 133-817B; Coefficient of compressibility; Coefficient of consolidation; Coefficient of volume change; Coral Sea; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg133; Ocean Drilling Program; ODP; Permeability; Pressure; Sample code/label; Velocity, compressional wave; Void Ratio description
    Type: Dataset
    Format: text/tab-separated-values, 941 data points
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  • 5
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    (Table 4) Volume of natural gas within the downhole log-inferred gas-hydrate occurrences in ODP Leg 164 sites (2000)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 164-994; 164-995; 164-997; COMPCORE; Composite Core; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; Joides Resolution; Latitude of event; Layer thickness; Leg164; Longitude of event; Nicaraguan Rise, North Atlantic Ocean; Ocean Drilling Program; ODP; Porosity; Saturation; South Atlantic Ocean; Volume
    Type: Dataset
    Format: text/tab-separated-values, 21 data points
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  • 6
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    (Table 5) Volume of natural gas within the downhole log-inferred free-gas occurrences in ODP Leg 164 sites (2000)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 164-994; 164-995; 164-997; COMPCORE; Composite Core; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; Joides Resolution; Latitude of event; Layer thickness; Leg164; Longitude of event; Nicaraguan Rise, North Atlantic Ocean; Ocean Drilling Program; ODP; Porosity; Saturation; South Atlantic Ocean; Volume
    Type: Dataset
    Format: text/tab-separated-values, 35 data points
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  • 7
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    (Table 1) Summary of one-dimensional consolidation test results for ODP Leg 133 holes (1993)
    PANGAEA
    In:  Supplement to: Ladd, John W; Moran, Kate; Kroon, Dick; Jarrard, Richard D; Chen, Min-Pen; Palmer-Julson, Amanda; Glenn, Craig R (1993): Porosity variation and consolidation on the northeastern Australian Margin. In: McKenzie, JA; Davies, PJ; Palmer-Julson, A; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 133, 617-623, https://doi.org/10.2973/odp.proc.sr.133.269.1993
    Details
    Publication Date: 2024-01-09
    Description: Most of the sediments at Sites 819 through 821 are underconsolidated, likely the result of high sedimentation rates. Normally consolidated sediments appear at intervals of low sedimentation rate at Site 820. Overconsolidation occurs in the shallowest unit of Site 820, suggesting recent mass wasting, and at the deepest interval, which may define an older erosional surface. At Site 819 for the depth range of 0 to 400 m, porosity is correlated with percentage of mud and is inversely proportional to carbonate content. Mass accumulation rates in the upper 30 m above a major hiatus at Site 819 are fairly constant from 240 to 100 k.y., following a 50-k.y. period of slightly higher accumulation rates. The mass accumulation rate increases steadily from 100 k.y. to the present.
    Keywords: 133-819A; 133-820B; 133-821A; Coefficient; Comment; Coral Sea; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Effective overburden pressure; Event label; Joides Resolution; Leg133; Lithologic unit/sequence; Lithology/composition/facies; Ocean Drilling Program; ODP; Overconsolidation ratio; Preconsolidation pressure; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 63 data points
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  • 8
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    (Table 1) Lithologic characteristics of samples from ODP Sites 113-815 and 133-817 (1993)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 133-815; 133-817; Aragonite; Bioclasts; Calcite; Calcite, inorganic; Calcium carbonate; COMPCORE; Composite Core; Coral Sea; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Epoch; Event label; Foraminifera; Joides Resolution; Leg133; Lithoclasts; Micrite; Nannofossils; Ocean Drilling Program; ODP; Oxides; Pteropoda; Quartz; Sample code/label; Spiculae
    Type: Dataset
    Format: text/tab-separated-values, 300 data points
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  • 9
    Electronic Resource
    Electronic Resource
    Evidence for the Opening of the South Atlantic in the Early Cretaceous (1973)
    [s.l.] : Nature Publishing Group
    Nature 246 (1973), S. 209-212 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] West of Cape Town, South Africa, in the Cape Basin, there occurs a sequence of north-west trending magnetic anomalies which indicates that seafloor spreading took place from 130 to 110 m.y. BP (Fig. 1). In the Argentine Basin, possible correlative anomalies are identified, though their definition ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/246209a0
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    Paper (German National Licenses)
    Fulltext
  • 10
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    Tectonic processes along the Middle America Trench inner slope (1982)
    Geological Society of London
    Details
    Publication Date: 1982-01-01
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society of London
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    PAPER CURRENT
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