Muséum National d'Histoire Naturelle (MNHN) (1990): Annotated record of the detailed examination of Mn deposits from SOMIRMAS cruise stations [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.854652
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Abstract:
The cores and dredges described at this site were taken on the SOMIRMAS cruise from 5 July to 14 August 1990 by the MusÈum National d'Histoire Naturelle from the R/V Marion Dufresne. A total of 30 cores and dredges were recovered and are available at MNHN for sampling and study.
Related to:
MNHN (1990): SOMIRMAS Cruise - MD64, R/V Marion Dufresne, core list. Muséum National d'Histoire Naturelle, Paris, unpublished, https://geocores.mnhn.fr/index.php?catid=7&blogid=1
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: -7.995238 * Median Longitude: 53.414286 * South-bound Latitude: -14.766667 * West-bound Longitude: 52.616667 * North-bound Latitude: -4.033333 * East-bound Longitude: 55.333333
Date/Time Start: 1990-07-13T00:00:00 * Date/Time End: 1990-12-08T00:00:00
Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 6.655 m
Event(s):
MD64-08 (DR900051) * Latitude: -14.766667 * Longitude: 55.333333 * Date/Time: 1990-07-13T00:00:00 * Elevation: -3397.0 m * Recovery: 86 kg * Location: Indian Ocean * Campaign: MD64 (Somirmas) * Basis: Marion Dufresne (1972) * Method/Device: Dredge (DRG)
MD64-16 (GS900927) * Latitude: -8.850000 * Longitude: 52.616667 * Date/Time: 1990-07-26T00:00:00 * Elevation: -3565.0 m * Recovery: 8.95 m * Location: Indian Ocean * Campaign: MD64 (Somirmas) * Basis: Marion Dufresne (1972) * Method/Device: Piston corer (PC)
MD64-17 (DR900056) * Latitude: -8.583333 * Longitude: 53.000000 * Date/Time: 1990-07-26T00:00:00 * Elevation: -3800.0 m * Recovery: 269 kg * Location: Indian Ocean * Campaign: MD64 (Somirmas) * Basis: Marion Dufresne (1972) * 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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | MNHN | |||
| 2 | Latitude of event | Latitude | MNHN | |||
| 3 | Longitude of event | Longitude | MNHN | |||
| 4 | Elevation of event | Elevation | m | MNHN | ||
| 5 | Method/Device of event | Method/Device | MNHN | |||
| 6 | Sample code/label | Sample label | MNHN | |||
| 7 | DEPTH, sediment/rock | Depth sed | m | MNHN | Geocode | |
| 8 | Depth, top/min | Depth top | m | MNHN | ||
| 9 | Depth, bottom/max | Depth bot | m | MNHN | ||
| 10 | Position | Position | MNHN | |||
| 11 | Deposit type | Deposit type | MNHN | |||
| 12 | Quantity of deposit | Quantity | MNHN | |||
| 13 | Size | Size | MNHN | |||
| 14 | Substrate type | Substrate | MNHN | |||
| 15 | Sediment type | Sediment | MNHN | |||
| 16 | Feature | Feature | MNHN | |||
| 17 | Description | Description | MNHN |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
86 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Elevation [m] | 5 Method/Device | 6 Sample label | 7 Depth sed [m] | 8 Depth top [m] | 9 Depth bot [m] | 10 Position | 11 Deposit type | 12 Quantity | 13 Size | 14 Substrate | 15 Sediment | 16 Feature | 17 Description |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MD64-08 | -14.7667 | 55.3333 | -3397 | Dredge | MD-DR900051-1 | 0.000 | 0.00 | 0.00 | Surface | Mn crust | Several | Rock; basalt | Hard ground | Blocks of sub-ophitic basalt with Mn oxyde crust; vesicles filled by calcite and smectite. | ||
| MD64-16 | -8.8500 | 52.6167 | -3565 | Piston corer | MD-GS900927-1 | 3.620 | 3.62 | 3.62 | Buried | Mn nodule | Several | 2.0-5.0 cm | Calcareous ooze | White calcareous nanno ooze with discoasters and foraminifers. Fine siliciclastic. Frequent burrowing towards the top (filled in by oxide bearing lays). | 362-362. Spherical nodules. 2-5cm diam. | |
| MD64-16 | -8.8500 | 52.6167 | -3565 | Piston corer | MD-GS900927-2 | 6.655 | 6.44 | 6.87 | Buried | Mn crust | Several | Rock; indurated hardened clay | Calcareous ooze | Brown calcareous ooze with nannofossils and oxides. Phillipsite and discoasters. With indurated clayed blocks with oxide incrustations on the upper side. | Brown calcareous ooze with nannofossils and oxides. Phillipsite and discoasters. With indurated clayed blocks with oxide incrustations on the upper side. | |
| MD64-17 | -8.5833 | 53.0000 | -3800 | Dredge | MD-DR900056-1 | 0.000 | 0.00 | 0.00 | Surface | Mn crust | Thick | Rock; basaltic breccia | Hard ground | Basaltic breccias with phyllitic cement, and thick Fe-Mn oxyde coating | ||
| MD64-24 | -6.5833 | 52.9000 | -1657 | Piston corer | MD-GS900932-1 | 0.000 | 0.00 | 0.00 | Surface | Mn crust | Many | Fragment | Hard ground | Fragments of crust and polymetallic oxides. The summit of the Mirantes Ridges appears to be covered by polymetallic crusts that stop piston coring. | ||
| MD64-25 | -6.5833 | 52.9500 | -2085 | Piston corer | MD-GS900933-1 | 0.450 | 0.30 | 0.60 | Buried | Mn coating | Several | Fragment | Rock; limestone | Coral gravel | 30-60. Limestone fragments sometimes coated with oxide crusts in a gravel of coral and crust debris. | |
| MD64-25 | -6.5833 | 52.9500 | -2085 | Piston corer | MD-GS900933-2 | 3.775 | 3.50 | 4.05 | Buried | Mn coating | Several | Fragment | Coral debri | Shelly sand | Shelly sand beige with foraminifers (frequent towards the top), graded bedding. Cemented by recryztallized carbonates. Siliciclastic abundant (heavy minerals). Discoasters present at the top of the unit. | Coral and polymetallic oxydes fragments with an oxyde coating at the bottom. |
| MD64-26 | -6.5667 | 52.6833 | -1783 | Piston corer | MD-GS900934-1 | 0.000 | 0.00 | 0.00 | Surface | Mn crust | Many | Fragment | Hard ground | Fragments of crust and polymetallic oxides. The summit of the Mirantes Ridges appears to be covered by polymetallic crusts that stop piston coring. | ||
| MD64-29 | -4.0333 | 54.4167 | -1327 | Dredge | MD-DR900058-1 | 0.000 | 0.00 | 0.00 | Surface | Mn coating | Several | Coral debri | Coral sand | Coral debris sometimes slightly coated with Fe-Mn oxydes. |