Stanley, Daniel Jean; Taylor, P T; Sheng, Harrison; Stuckenrath, Robert Jr (1981): Annotated record of the detailed examination of Mn deposits from the Northwest Atlantic Basin [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.883656, Supplement to: Stanley, DJ et al. (1981): Sohm Abyssal Plain: Evaluating Proximal Sediment Provenance. Smithsonian Contributions to the Marine Sciences, 11, 1-48, https://doi.org/10.5479/si.01960768.11
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
The southernmost part of the Sohm Abyssal Plain in the Northwest Atlantic Basin is geographically distal with respect to the major source of Quaternary terrigenous material transported from the Canadian Maritime Provinces. An assessment of the proportion of more locally introduced sediment relative to that derived from distal sources is based largely on size and compositional analyses of Quaternary piston core samples. These data are supplemented by radiocarbon dating of selected core samples, bottom photographs, conductivity-temperature-depth profiles, and seismic records. The premises of the study are that (a) locally derived sediment should be most abundant near high-relief bathymetric features such as seamounts and abyssal hills, and (b) such material should contain enhanced proportions of reworked volcanic debris and alteration products. Core analyses reveal that the amounts of these are directly related to proximity of volcanic ocean-bottom features, and that a significant, although not total, amount of such volcanic materials recovered from cores are derived from submarine weathering of basalt. Associated with this assemblage are nannofossils, dating from the Quaternary to the Upper Cretaceous, reworked from older strata. This increased proportion of volcanic and related products and reworked faunas near seamounts and basement rises strongly implies that such topographic features continue to serve as major source terrains. Locally derived volcanic materials, however, are usually disseminated and masked on the Sohm Abyssal Plain, particularly in sectors receiving large amounts of terrigenous turbidites and biogenic suspensates, and/or undergoing reworking by bottom currents. We propose that the volcanic fraction can serve as a useful index, or "yardstick," to interpret the role of locally derived material in abyssal plain sedimentation. A sedimentation model is developed to illustrate the premise that as access to land-derived sources diminishes, the proportion of terrigenous components is reduced while pelagic and volcanic fractions are enhanced. Thus, sediment accumulating in abyssal plains almost totally isolated from terrigenous sources would comprise significant amounts of pelagic (including wind-blown) and volcanic components.
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: 32.131250 * Median Longitude: -50.886250 * South-bound Latitude: 30.625000 * West-bound Longitude: -56.200000 * North-bound Latitude: 33.483000 * East-bound Longitude: -40.575000
Date/Time Start: 1948-10-24T00:00:00 * Date/Time End: 1968-08-26T00:00:00
Minimum DEPTH, sediment/rock: 0.020 m * Maximum DEPTH, sediment/rock: 2.800 m
Event(s):
AT153-149CC * Latitude: 30.625000 * Longitude: -40.575000 * Date/Time: 1948-10-24T00:00:00 * Elevation: -2100.0 m * Recovery: 0.11 * Location: Atlantic Ocean * Campaign: AT153 * Basis: Atlantis (1931) * Method/Device: Photo/Video (PV) * Comment: WHOI
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 | Latitude of event | Latitude | ||||
3 | Longitude of event | Longitude | ||||
4 | Elevation of event | Elevation | m | |||
5 | Method/Device of event | Method/Device | ||||
6 | Identification | ID | ||||
7 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
8 | Depth, top/min | Depth top | m | |||
9 | Depth, bottom/max | Depth bot | m | |||
10 | Position | Position | Visual description | |||
11 | Deposit type | Deposit type | ||||
12 | Quantity of deposit | Quantity | ||||
13 | Substrate type | Substrate | ||||
14 | Sediment type | Sediment | ||||
15 | Comment | Comment | ||||
16 | Description | Description | ||||
17 | File name | File name | ||||
18 | Uniform resource locator/link to image | URL image |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
87 data points
Data
1 Event | 2 Latitude | 3 Longitude | 4 Elevation [m] | 5 Method/Device | 6 ID | 7 Depth sed [m] | 8 Depth top [m] | 9 Depth bot [m] | 10 Position | 11 Deposit type | 12 Quantity | 13 Substrate | 14 Sediment | 15 Comment | 16 Description | 17 File name | 18 URL image |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
AT153-149CC | 30.6250 | -40.5750 | -2100 | Photo/Video | AT153-149CC-1 | 0.055 | 0.00 | 0.11 | Buried | Mn staining | Several | Shells, coral | Ooze | Globigerina ooze with abundant pteropods | Mn staining of shells and Alcyonarian stems | ||
V22-231 | 33.4830 | -54.1700 | -5535 | Piston corer | V22-231-1 | 0.020 | 0.00 | 0.04 | Surface | Fe-Mn nodule | Several | Core; pumice | Clay | Chalky clay, moderate brown (5YR4/4), moist, soft and homogeneous | Some light brown pumice and iron oxide concretions. | ||
V22-231 | 33.4830 | -54.1700 | -5535 | Piston corer | V22-231-2 | 0.085 | 0.04 | 0.13 | Buried | Mn coating | Several | Foraminifera | Marl | Foraminiferal marl, pale yellowish brown (10YR6/2), moist, moderately firm and intensively burrowed | Coarse fraction 8% to 10%, contains essentially medium and large planktonic foraminifera (some manganese-coated). | ||
V22-231 | 33.4830 | -54.1700 | -5535 | Piston corer | V22-231-3 | 0.590 | 0.13 | 1.05 | Buried | Mn nodule | Several | Clay | Chalky clay, between pale yellowish brown (10YR6/2) and light olive gray (5Y5/2), moist, soft and plastic, intensively burrowed at top, but homogeneous toward the bottom | Some manganese concretions | |||
V22-231 | 33.4830 | -54.1700 | -5535 | Piston corer | V22-231-4 | 0.590 | 0.13 | 1.05 | Buried | Mn coating | Several | Foraminifera | Clay | Chalky clay, between pale yellowish brown (10YR6/2) and light olive gray (5Y5/2), moist, soft and plastic, intensively burrowed at top, but homogeneous toward the bottom | Small planktonic foraminifera manganese-coated as burrow-filling | ||
V26-6 | 32.7000 | -52.6000 | -5207 | Piston corer | V26-6-1 | 0.160 | 0.00 | 0.31 | In sediment | Mn micronodule | Few | Clay | Foraminiferal clay, grayish orange pink (5 YR 7/2), to light brown (5 YR 6/4), moist, firm and burrowed | low. Coarse fraction 15% to 5%, mostly planktonic and benthonlc foraminifera, with rare manganese micronodules and fish teeth. | |||
V26-6 | 32.7000 | -52.6000 | -5207 | Piston corer | V26-6-2 | 2.700 | 0.31 | 5.87 | In sediment | Mn micronodule | Many | Clay | Clay, moderate yellowish brown (10 YR 5/4) to moderate brown (5 YR 3/4), moist, firm and slightly burrowed | Coarse fraction about 1%, mostly manganese micronodules, fish teeth and negligible palagonite. | Fig17_Stanley.jpg | Fig17_Stanley.jpg | |
V26-9 | 31.7170 | -56.2000 | -5546 | Piston corer | V26-9-1 | 0.250 | 0.00 | 0.41 | In sediment | Mn micronodule | Several | Clay | Clay, light brown (5 YR 6/4), moist, firm and burrowed | Coarse fraction about 1%, mostly planktonic foraminifera near the top, with rare micronodules of manganese, decreasing toward bottom while manganese micronodules become more predominant. | |||
V26-9 | 31.7170 | -56.2000 | -5546 | Piston corer | V26-9-1 | 2.800 | 0.41 | 6.09 | In sediment | Mn micronodule | Many | Clay | Clay, light brown (5 YR 6/4) to moderate brown (5 YR 4/4) to dark yellowish brown (10 YR 4/2), moist, firm and burrowed | Coarse fraction 1% or less, mostly manganese micronodules. |