Pratt, Richard M (1968): Observation of manganese coating and encrustation in different environments of the North-Western Atlantic ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.864210, Supplement to: Pratt, RM (1968): Atlantic continental shelf and slope of the United States - Physiography and sediments of the deep-sea basin. U.S. Geological Survey Professional Paper, 529-B, 50 pp, https://pubs.usgs.gov/publication/pp529B
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Abstract:
The major topographic features, or provinces, beyond the continental slope off the Atlantic coast of the United States are (1) Sohm Plain, (2) Hatteras Plain, (3) Nares Plain, (4) Blake Basin, (5) Blake Plateau-Bahama Banks, and (6) Bermuda Rise. The whole of the described area is commonly referred to as the North American Basin. This basin is bounded on the north by Newfoundland Ridge and on the south by Puerto Rico Trench. Topographic features of note within the basin are the divide and the area of depressions between Sohm and Hatteras Plains, the sharply crested Blake Ridge, and the Puerto Rico Ridge. Recently accumulated data on deep-sea oores has given good evidence that the silt and sand covering the abyssal plains are displaced continental sediments in a virtually quartz-free oceanic environment. These sediments were deposited on a primary volcanic bottom. The primary or volcanic bottom is characterized by abyssal hills and seamounts, and the sediment bottom is characterized by abyssal plains, which extend seaward from the continental margins. On the Blake Plateau, bottom photographs and dredge hauls in the axis of the stream show that locally sediment has been removed and the bottom is paved with crusts and nodules of manganese. Photographs and dredged samples from the outer part of the New England Seamount, Chain and Caryn Peak also indicate extensive encrustations of manganese oxide which acts as a binding agent in areas of ooze or other organic debris and thus helps to stabilize the bottom.
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: 34.022336 * Median Longitude: -67.088778 * South-bound Latitude: 30.816676 * West-bound Longitude: -78.833333 * North-bound Latitude: 37.683333 * East-bound Longitude: -60.000000
Date/Time Start: 1960-10-18T00:00:00 * Date/Time End: 1962-06-19T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
AT260-7D * Latitude: 33.567000 * Longitude: -62.433000 * Date/Time: 1960-10-18T00:00:00 * Elevation: -1542.0 m * Location: Bermuda Rise * Campaign: AT260 * Basis: Atlantis (1931) * Method/Device: Dredge (DRG) * Comment: Institute: WHOI
AT266-15C * Latitude: 30.816676 * Longitude: -78.833333 * Date/Time: 1961-07-13T00:00:00 * Elevation: -1390.0 m * Location: Atlantic Ocean * Campaign: AT26601 * Basis: Atlantis (1931) * Method/Device: Photo/Video (PV)
AT280-05C * Latitude: 37.683333 * Longitude: -60.000000 * Date/Time: 1962-06-19T00:00:00 * Elevation: -4133.0 m * Location: Atlantic Ocean * Campaign: AT28001 * Basis: Atlantis (1931) * Method/Device: Photo/Video (PV)
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 | Pratt, Richard M | |||
| 2 | Sample ID | Sample ID | Pratt, Richard M | |||
| 3 | DEPTH, sediment/rock | Depth sed | m | Pratt, Richard M | Geocode | |
| 4 | Position | Position | Pratt, Richard M | |||
| 5 | Deposit type | Deposit type | Pratt, Richard M | |||
| 6 | Quantity of deposit | Quantity | Pratt, Richard M | |||
| 7 | Substrate type | Substrate | Pratt, Richard M | |||
| 8 | Sediment type | Sediment | Pratt, Richard M | |||
| 9 | Comment | Comment | Pratt, Richard M | |||
| 10 | Description | Description | Pratt, Richard M | |||
| 11 | Uniform resource locator/link to image | URL image | Pratt, Richard M |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
25 data points
Data
| 1 Event | 2 Sample ID | 3 Depth sed [m] | 4 Position | 5 Deposit type | 6 Quantity | 7 Substrate | 8 Sediment | 9 Comment | 10 Description | 11 URL image |
|---|---|---|---|---|---|---|---|---|---|---|
| AT266-15C | AT266-15C-1P | 0 | Surface | Mn crust | Several | Rock; P2O5 pavement | Sand | Globigerina-pteropod sand | The sand is being moved over a manganese oxide-encrusted bottom (dark areas in photograph). The hard manganese pavement limits downward erosion. | hdl:10013/epic.48479.d001 |
| AT280-05C | AT280-05C-1BP | 0 | Surface | Mn crust | Several | Rock; basalt | Hard ground | Manganese oxide encrustation on Rehoboth Seamount. This type of rough crust seems to be characteristic of areas where clastic sediments are absent. | hdl:10013/epic.48479.d002 | |
| AT260-7D | AT260-7D-1P | 0 | Surface | Mn coating | Several | Coral | Gravel | Samples of coral from Muir Seamount showing progressive encrustation by manganese oxide. The samples are arranged so that manganese encrustation increases from left to right. | hdl:10013/epic.48479.d003 |