Moore, Willard S; Vogt, Peter R (1976): Analysis of manganese crusts from Galapagos [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.882356, Supplement to: Moore, WS; Vogt, PR (1976): Hydrothermal manganese crusts from two sites near the Galapagos spreading axis. Earth and Planetary Science Letters, 29(2), 349-356, https://doi.org/10.1016/0012-821X(76)90139-4
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Published: 1976 (exact date unknown) • DOI registered: 2017-11-29
Abstract:
Manganese oxide crusts similar to those reported from the Mid-Atlantic Ridge rift valley by Scott et al., 1974 (https://doi.pangaea.de/10.1594/PANGAEA.848726) were dredged at two sites near the Galapagos spreading axis on ocean floor estimated from magnetic anomalies to be 2.4 and 0.3 m.y. old. Compared to the typical ocean-floor manganese deposits attributed to precipitation from seawater, the 2-6 cm thick manganese crusts reported here exhibit very low Fe/Mn and low 232Th/238U ratios, as well as lower transition metal and higher manganese concentrations. The manganese crusts were deposited several orders of magnitude faster than the more common hydrogenous nodules; this fact together with other geochemical characteristics and the geophysical environment suggests the manganese deposits reported here are of hydrothermal origin.
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):
Coverage:
Median Latitude: 2.831650 * Median Longitude: -95.205850 * South-bound Latitude: 2.698300 * West-bound Longitude: -95.241700 * North-bound Latitude: 2.965000 * East-bound Longitude: -95.170000
Date/Time Start: 1974-01-01T00:00:00 * Date/Time End: 1974-01-01T00:00:00
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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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
- Moore, WS; Vogt, PR (1976): Annotated record of the detailed examination of ferromanganese crusts from the Galapagos Ridge area. https://doi.org/10.1594/PANGAEA.882354
- Moore, WS; Vogt, PR (2017): (Tables 1, page 354) Chemical composition of ferromanganese crusts from the Galapagos Ridge area. https://doi.org/10.1594/PANGAEA.882355