Bouysse, Philippe; Kang, Jung-Keuk; Kosakevitch, A; Lallier-Verges, Elisabeth (1987): Chemical composition and description of a ferromanganese crust, sample 89D, obtained during R/V Capricorne cruise ARCANTE 1 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.858162, Supplement to: Bouysse, P et al. (1987): Hydrothermal manganese deposit of upper pliocene age from the Lesser Antilles outer arc (Bertrand bank) (in french). Oceanologica Acta, 10(4), 375-386, https://archimer.ifremer.fr/doc/00108/21897/19488.pdf
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Abstract:
A manganese oxide encrustation (2.5 kg) was dredged, in an island arc setting, downslope of Bertrand bank, a seamount culminating at 70-m depth and located NNE of Grande-Terre, Guadeloupe, and SE of Antigua, West Indies. A thorough texturai analysis indicated a rhythmic precipitation and growth polarity as well as mineralogical ( 10 A tektomanganate) and geochemical (low concentrations of Ni, Cu, Co, Zn, Pb and REE) criteria, point to a submarine hydrothermal origin for most of the sample. The crust was coated with a fine ferromanganese oxide cortex deposited iii a "normal" oceanic environment; it also included micritic fillings, a main pyroclastic zone near the top of the crust, and a Mg-Al sulphate deposit. Planktonic foraminifera coeval with the precipitation of the manganese oxide indicate an age of ca. 3 m. y. (upper Pliocene); i.e., more than 20 m. y. after the cessation of the volcanic activity of the Lesser Antilles outer arc that was responsible for the buildup of the Bertrand seamount. Furthermore, the genesis of the crust is not linked to the activity of the contemporaneous inner arc (Miocene to Present), particularly of its nearmost segment (Basse Terre, Guadeloupe-Montserrat) located about 50 km to the West. The authors suggest that the manganese oxide is the result of convective circulation of sea water through a faulted system occurring in an area of intense seismic activity. The remobilization of chemical elements (Mn, S, etc.) within the seamount volcanic core bas probably affected a substratum that was still hydrothermally altered during the previous volcanic activity of the outer arc. The authors insist on the interest in using texturai analysis for Fe/Mn oxide investigations.
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:
Latitude: 16.658900 * Longitude: -61.605020
Date/Time Start: 1978-01-07T00:00:00 * Date/Time End: 1978-01-07T00:00:00
Event(s):
ARCNT-89D (77007911_89_9672) * Latitude: 16.658900 * Longitude: -61.605020 * Date/Time: 1978-01-07T00:00:00 * Elevation: -560.0 m * Location: Caribbean Sea * Campaign: ARCANTE1 * Basis: Capricorne * Method/Device: Dredge (DRG) * Comment: IFREMER
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.
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Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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Datasets listed in this publication series
- Bouysse, P; Kang, J-K; Kosakevitch, A et al. (1987): Annotated record of the detailed examination of a ferromanganese crust dredged during the Arcante 1 expedition in the Lesser Antilles outer arc. https://doi.org/10.1594/PANGAEA.858159
- Bouysse, P; Kang, J-K; Kosakevitch, A et al. (1987): (Table 1-2, page 379-780) Spot analyses of todorokite mineral inside sample 89D, a ferromanganese crust from the Lesser Antilles outer arc. https://doi.org/10.1594/PANGAEA.858160
- Bouysse, P; Kang, J-K; Kosakevitch, A et al. (1987): (Table 3, page 381) Average chemical composition of sample 89D, a ferromanganese crust from the Lesser Antilles outer arc. https://doi.org/10.1594/PANGAEA.858161