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Hekinian, Roger; Rosendahl, Bruce R; Natland, James H (1980): Analysis of Mn-deposits recovered during Leg 54 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.873006, Supplement to: Hekinian, R et al. (1980): Ocean Crust Geothermal Processes: A Perspective from the Vantage of Leg 54 Drilling. In: Rosendahl, B.R.; Hekinian, R.; et al., Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, VIV, 267-294, https://doi.org/10.2973/dsdp.proc.54.115.1980

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Abstract:
Two distinct sedimentary facies produced by sea-floor hydrothermal activity were cored during Deep Sea Drilling Project Leg 54. The first is equivalent to the typical basal iron- and manganese-rich, clayey mud recovered at many DSDP sites. It was sampled as a dispersed component throughout the cores taken in small sediment ponds in several sites within 120 km of the East Pacific Rise at 9°N. We infer that this component was originally deposited as iron hydroxides dispersed from high-temperature vents over the axial magma chamber of the East Pacific Rise. In the sediments, the iron hydroxides have reacted diagenetically with siliceous microfossil tests and detrital clays to form K- and Fe-rich clays with variable SiO2/Fe2O3 and Fe2O3/Al2O3, ratios.
Source:
Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT
Further details:
Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN
Project(s):
Deep Sea Drilling Project (DSDP)
NOAA and MMS Marine Minerals Geochemical Database (NOAA-MMS)
Coverage:
Median Latitude: 2.817645 * Median Longitude: -91.112131 * South-bound Latitude: 0.588800 * West-bound Longitude: -106.112800 * North-bound Latitude: 9.046200 * East-bound Longitude: -86.070300
Date/Time Start: 1977-05-08T00:00:00 * Date/Time End: 1977-06-06T00:00:00
Event(s):
54-419 * Latitude: 8.932700 * Longitude: -105.686200 * Date/Time: 1977-05-08T00:00:00 * Elevation: -3274.0 m * Penetration: 35 m * Recovery: 21.6 m * Location: North Pacific/SEDIMENT POND * Campaign: Leg54 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 35 m cored; 0 m drilled; 61.7 % recovery
54-420 * Latitude: 9.001700 * Longitude: -106.112800 * Date/Time: 1977-05-10T00:00:00 * Elevation: -3381.0 m * Penetration: 147 m * Recovery: 82.2 m * Location: North Pacific/SEDIMENT POND * Campaign: Leg54 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 15 cores; 123.2 m cored; 0 m drilled; 66.7 % recovery
54-421 * Latitude: 9.023500 * Longitude: -106.061300 * Date/Time: 1977-05-12T00:00:00 * Elevation: -3339.0 m * Penetration: 114 m * Recovery: 11.2 m * Location: North Pacific/CONT RISE * Campaign: Leg54 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 4 cores; 38 m cored; 114 m drilled; 29.5 % recovery
Comment:
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.
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Hekinian, R; Rosendahl, BR; Natland, JH (1980): Annotated record of the detailed examination of Mn deposits from DSDP Leg 54 (Holes 419, 420, 421, 424, 424A, 424B, 424C, 425, 427, 428, 428A). https://doi.org/10.1594/PANGAEA.873003
  2. Hekinian, R; Rosendahl, BR; Natland, JH (1980): (Table 4, page 411) Chemical composition of a manganese crust from the Galapagos Spreading Center recovered at DSDP Leg 54 (Hole 424). https://doi.org/10.1594/PANGAEA.873004