de.pangaea.dataset874690 und dataset PANGAEA

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https://www.pangaea.de/ information pointOfContact 2026-04-30T22:47:50Z https://doi.pangaea.de/10.1594/PANGAEA.874690 1966-01-01 publication https://doi.org/10.1594/PANGAEA.874690 Jones, E J W author Laughton, Anthony S author Hill, M N author Davies, D https://orcid.org/0000-0001-6304-3938 information author PANGAEA

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https://www.pangaea.de/ information publisher tableDigital 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 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. completed NOAA-MMS NOAA and MMS Marine Minerals Geochemical Database theme 1995-01-01 creation PANGAEA

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https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-3.0: Creative Commons Attribution 3.0 Unported textTable und geoscientificInformation -25.441667 -25.391667 28.833333 28.85 1962-02-01T00:00:00 1962-02-01T00:00:00 0.0 0.0 From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database. Event label thematicClassification Identification thematicClassification DEPTH, sediment/rock physicalMeasurement m m Position thematicClassification Visual description Deposit type thematicClassification Quantity of deposit thematicClassification Substrate type thematicClassification Sediment type thematicClassification Description thematicClassification File name thematicClassification Uniform resource locator/link to image thematicClassification text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.874690?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: D4810 * LATITUDE: 28.850000 * LONGITUDE: -25.441667 * DATE/TIME: 1962-02-01T00:00:00 * ELEVATION: -2576.0 m * LOCATION: Atlantic Ocean * CAMPAIGN: MADCAP_62 * BASIS: Discovery II (1929) * METHOD/DEVICE: Photo/Video 1962-02-01T00:00:00 EVENT LABEL: D4814 * LATITUDE: 28.833333 * LONGITUDE: -25.391667 * DATE/TIME: 1962-02-01T00:00:00 * ELEVATION: -2571.0 m * LOCATION: Atlantic Ocean * CAMPAIGN: MADCAP_62 * BASIS: Discovery II (1929) * METHOD/DEVICE: Photo/Video 1962-02-01T00:00:00 Source 1992-01-01 publication https://doi.org/10.7289/V52Z13FT Grant, John Bruce author Moore, Carla J

carla.j.moore@noaa.gov

https://orcid.org/0000-0002-2610-8648 information author Alameddin, George author Chen, Kuiying author Barton, Mark author documentDigital National Geophysical Data Center, NOAA Further details 1992-01-01 publication https://doi.org/10.7289/V53X84KN Warnken, Robin R

rrw@luna.ngdc.noaa.gov

author Virden, William T author Moore, Carla J

carla.j.moore@noaa.gov

https://orcid.org/0000-0002-2610-8648 information author documentDigital National Geophysical Data Center, NOAA