Hanselmann, D H; Ryan, William B F (1983): Observation of manganese deposits in the Hudson Canyon by the ALVIN submersible in 1972 and 1978 and by the R/V Researcher during its COMSED expedition in 1974 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.871723
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Published: 1983 (exact date unknown) • DOI registered: 2017-03-23
Abstract:
During the period of 22-28 July, 1978, five dives were made in the manned submersible ALVIN into the Atlantic Ocean 3800 meter depth radioactive waste disposal site located in the Hudson Canyon channel approximately 320 kilometers from the Maryland-Delaware coast. A geological description of the site was made by direct examination of the bottom topography, bedrock exposures, sedimentary and erosional processes, and sediment cores collected from the dumpsite area. Observations within a depth range of 3985-3830 meters revealed angular blocks and piles of displaced channel wall rock, boulder and cobble olistoliths of Eocene-age chalks derived from higher elevations on the slope, and bedforms such as ripples and scour marks which imply the existence of periodic strong currents. Local benthic fauna were sparse. Three low-level radioactive waste drums were examined from the submersible, and one was subsequently recovered for corrosion, and concrete deterioration analyses. Photographic and visual evidence suggest that downslope transport of objects such as talus blocks, olistoliths, and radioactive waste drums has occurred in this area. These observations complement those made by G. Keller in earlier ALVIN dives performed in 1972 and by the AOML(MG&GL project. COMSED (Continental Margin Sedimentary Processes) cruise performed in 1974 by the R/V Researcher.
Related to:
Hanselmann, D H; Ryan, William B F (1983): 1978 Atlantic 3800-meter radioactive waste disposal site survey: sedimentary, micromorphologic and geophysical analyses. Final report (No. EPA 520/1-83-017). United States Environmental Protection Agency, Washington D.C., USA. https://inis.iaea.org/search/search.aspx?orig_q=RN:15047445, 1-35, 100008LH_Indexed.pdf
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: 38.761871 * Median Longitude: -71.489940 * South-bound Latitude: 37.845313 * West-bound Longitude: -72.158000 * North-bound Latitude: 39.417000 * East-bound Longitude: -70.598520
Date/Time Start: 1972-06-29T00:00:00 * Date/Time End: 1978-06-24T00:00:00
Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 2.09 m
Event(s):
ALV-415 (AL41500) * Latitude: 39.417000 * Longitude: -72.158000 * Date/Time: 1972-06-29T00:00:00 * Elevation: -1248.0 m * Location: Hudson Canyon, Atlantic Ocean * Campaign: ALV415 * Basis: Alvin * Method/Device: Grab (GRAB)
ALV-813 (AL81300) * Latitude: 37.845313 * Longitude: -70.598520 * Date/Time: 1978-06-24T00:00:00 * Elevation: -3983.0 m * Location: Hudson Canyon, Atlantic Ocean * Campaign: ALV813 * Basis: Alvin * Method/Device: Grab (GRAB)
GR74-189HP * Latitude: 39.023300 * Longitude: -71.713300 * Date/Time: 1974-04-30T00:00:00 * Elevation: -2329.0 m * Recovery: 2.86 * Location: Hudson Canyon, Atlantic Ocean * Campaign: COMSED-74 * Basis: Researcher * Method/Device: Core (CORE)
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 | ||||
| 2 | Identification | ID | ||||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Depth, top/min | Depth top | m | |||
| 5 | Depth, bottom/max | Depth bot | m | |||
| 6 | Position | Position | Visual description | |||
| 7 | Deposit type | Deposit type | ||||
| 8 | Quantity of deposit | Quantity | ||||
| 9 | Substrate type | Substrate | ||||
| 10 | Sediment type | Sediment | ||||
| 11 | Comment | Comment | ||||
| 12 | Description | Description |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
29 data points
Data
| 1 Event | 2 ID | 3 Depth sed [m] | 4 Depth top [m] | 5 Depth bot [m] | 6 Position | 7 Deposit type | 8 Quantity | 9 Substrate | 10 Sediment | 11 Comment | 12 Description |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ALV-415 | ALV-415-1 | 0.00 | 0.00 | 0.00 | Surface | Mn coating | Several | Rock; limestone | Ooze | Calcareous ooze | Mn coating or staining on limestone olistoliths |
| ALV-813 | ALV-813-1 | 0.00 | 0.00 | 0.00 | Surface | Mn coating | Several | Pebble; quartz | Chalk | Gravel and white Eocene (?) chalk cobble bottom | Quartz pebbles with manganese coatings |
| GR74-189HP | GR74-189HP-1 | 2.09 | 1.32 | 2.86 | In sediment | Mn rich layer | 1 | Clay | Olive-gray silty clay | Intermittant black layering throughout (MnO or FeO are highly possible) |