Moorby, S A; Cronan, David S; Glasby, Geoffrey P (1984): (Table 1, page 434-435) Bulk chemical composition of S.W. Pacific island arc Mn-oxide crusts [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.856804, Supplement to: Moorby, SA et al. (1984): Geochemistry of hydrothermal Mn-oxide deposits from the S.W. Pacific island arc. Geochimica et Cosmochimica Acta, 48(3), 433-441, https://doi.org/10.1016/0016-7037(84)90272-2
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Published: 1984 (exact date unknown) • DOI registered: 2016-02-09
Abstract:
Hydrothermal Mn-oxide crusts have been removed from the Tonga-Kermadec Ridge, the first such hydrothermal deposits to be reported in the S.W. Pacific island arc. In several respects the deposits are similar to hydrothermal Mn-crusts from oceanic spreading centre settings. They are limited in areal extent, comprise well-crystalline birnessite and generally display extreme fractionation of Mn from Fe. They are strongly depleted in many elements compared to hydrogenous Mn deposits but are comparatively enriched in Li, Zn, Mo and Cd. The Group IA and Group IIA metals show strong intercorrelations and the behaviour of Mg in the purest samples may indicate the extent to which normal seawater has influenced the composition of the deposits. Certain aspects of the deposits are not typical of hydrothermal Mn deposits. In particular at least some of the crusts have developed on a sediment or unconsolidated talus substrate. Some crusts, or specific layers within some crusts, display a chemical composition which suggests a significant input from normal seawater.
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:
Moorby, S A; Cronan, David S; Glasby, Geoffrey P (1984): Plate 1. Side view of crust U23/1 showing granular surface, underlying massive layered material in which internal laminations are clearly visible and basal granular material. Scale divisions are in centimetres. In: Moorby, S. A., Cronan, D. S. and Glasby, G.P., 1984. Geochemistry of hydrothermal Mn-oxide deposits from the S.W. Pacific island arc, Geochimica et Cosmochimica Acta, 48(3), 435, hdl:10013/epic.46592.d001
Moorby, S A; Cronan, David S; Glasby, Geoffrey P (1984): Plate 2. Sample of a “platey" crust showing development of fibrous material. In: Moorby, S. A., Cronan, D. S. and Glasby, G.P., 1984. Geochemistry of hydrothermal Mn-oxide deposits from the S.W. Pacific island arc, Geochimica et Cosmochimica Acta, 48(3), 435, hdl:10013/epic.46592.d002
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: -26.940000 * Median Longitude: -177.605834 * South-bound Latitude: -26.945000 * West-bound Longitude: -177.620000 * North-bound Latitude: -26.935000 * East-bound Longitude: -177.591667
Date/Time Start: 1981-04-01T00:00:00 * Date/Time End: 1981-04-01T00:00:00
Minimum DISTANCE: 0.00 cm * Maximum DISTANCE: 2.70 cm
Event(s):
TANG1122-U23 * Latitude: -26.935000 * Longitude: -177.620000 * Date/Time: 1981-04-01T00:00:00 * Elevation: -1683.0 m * Location: Tonga-Kermadec ridge * Campaign: NZOI-1122 * Basis: Tangaroa (1960) * Method/Device: Dredge (DRG)
TANG1122-U24 * Latitude: -26.945000 * Longitude: -177.591667 * Date/Time: 1981-04-01T00:00:00 * Elevation: -1748.0 m * Location: Tonga-Kermadec ridge * Campaign: NZOI-1122 * Basis: Tangaroa (1960) * Method/Device: Dredge (DRG)
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.
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
851 data points