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  • NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS  (2)
  • Atlantic Ocean; D4810; D4814; Deposit type; DEPTH, sediment/rock; Description; Discovery II (1929); Event label; File name; Identification; MADCAP_62; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Photo/Video; Position; PV; Quantity of deposit; Sediment type; Substrate type; Uniform resource locator/link to image; Visual description  (1)
  • PANGAEA  (3)
  • Geological Society of America (GSA)
  • Nature Publishing Group
  • Oxford University Press
  • 1965-1969  (2)
  • 1935-1939  (1)
  • 1930-1934
  • 1966  (2)
  • 1937  (1)
Collection
Keywords
Publisher
  • PANGAEA  (3)
  • Geological Society of America (GSA)
  • Nature Publishing Group
  • Oxford University Press
Years
  • 1965-1969  (2)
  • 1935-1939  (1)
  • 1930-1934
Year
  • 1966  (2)
  • 1937  (1)
  • 1969  (1)
  • 1
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    Unknown
    Annotated record of the detailed examination of Mn deposits from the Madcap Volcano in the Madeira-Cape Verde Abyssal plain (1966)
    PANGAEA
    In:  Supplement to: Jones, E J W; Laughton, Anthony S; Hill, M N; Davies, D (1976): A geophysical study of part of the western boundary of the Madeira-Cape Verde Abyssal plain. Deep Sea Research and Oceanographic Abstracts, 13(5), 889-907, https://doi.org/10.1016/0011-7471(76)90909-8
    Details
    Publication Date: 2023-08-28
    Description: The results are discussed of a geophysical survey undertaken by R.R.S. Discovery II early in 1962 in an area centred on 29° 15'N, 25° 5'W at the western extremity of the Madeira-Cape Verde Abyssal Plain. Seismic investigations show that the sediments are underlain by an intermediate layer about 2 km in thickness of velocity 4.1-5.4 km/sec which overlies a deep layer 5.2-km thick of velocity 6.3-6.8 km/sec. Refracted arrivals on the longest seismic line give a depth of 13.2 km to the M discontinuity. Magnetic results indicate that the topography of the abyssal hills in the western part of the area is probably continued eastwards as sub-bottom relief beneath the sediments of the abyssal plain. They also support the hypothesis that the intermediate seismic layer (layer 2) is composed predominantly of volcanic rocks. Examination of a well-defined magnetic anomaly over one topographic feature ("The Madcap Volcano") shows it to be composed of magnetized rocks (I = 8.4 × 10**-3 e.m.u./cm**3) having a direction of magnetization which points upwards at 25° with an azimuth of 305°. Measurements at ten heat flow stations show that the average geothermal flux in this region is 1.20 (±0.11) µcal/cm**2/sec.
    Keywords: Atlantic Ocean; D4810; D4814; Deposit type; DEPTH, sediment/rock; Description; Discovery II (1929); Event label; File name; Identification; MADCAP_62; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Photo/Video; Position; PV; Quantity of deposit; Sediment type; Substrate type; Uniform resource locator/link to image; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 26 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Unknown
    Chemical composition of nodules from two locations in the Pacific Ocean using different methods (1966)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Manganese nodules recovered in the Pacific Ocean by the U. S. Bureau of Mines and by DeepSea Ventures Ltd. are studied for their chemical composition using X microprobe and X-ray fluorescence methods.
    Keywords: NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Description and illustrations of Mn deposits from the John Murray Expedition (R/V Mabahiss) (1937)
    PANGAEA
    In:  Supplement to: Wiseman, J D H (1937): Basalts from the Carlsberg Ridge, Indian Ocean. In: Geological and Mineralogical Investigations, The John Murray Expedition 1933-1934 - Scientific Reports. British Museum ( Natural History ), London, United Kingdom, 3(1), 2-31, hdl:10013/epic.46160.d006
    Details
    Publication Date: 2023-08-28
    Description: During the cruise of the" Mabahiss" from Zanzibar to Colombo at Station 133 (1° 25' 54" S. to 1° 19' 42" S. and 66° 34' 12" E. to 66° 35' 18" E.) several small rock fragments were brought up in the Monegasque net; and, since at this position there is no possibility of the material being transferred by floating Ice, these specimens are of some interest as samples of oceanic rock foundations. All the rocks have a black appearance, but in the majority this skin is of negligible thickness. Exceptionally, however, it may attain to 1/3 in. (St. 133, 8), and then the specimens are rounded. The coating is made of dark opaque manganese material. At Station 166 one or two similar specimens of angular basalt were found in the trawl consisting mainly of manganese nodules.
    Keywords: NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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