Aumento, Fabrizio; Loncarevic, B D (1969): Annotated record of the detailed examination of Mn deposits observed near the Median Rift Valley of the Atlantic Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.870721, Supplement to: Aumento, F; Loncarevic, BD (1969): The Mid-Atlantic Ridge near 45° N. III. Bald Mountain. http://store.pangaea.de/Projects/NOAA-MMS/e69-002.pdf, Canadian Journal of Earth Sciences, 6(1), 11-23, https://doi.org/10.1139/e69-002
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Metamorphosed and metasomatized basalts, and unmetamorphosed equivalents, were recovered from the steep slopes of Bald Mountain, a north-south elongated seamount lying 60 km west of the Median Rift Valley at 45° N. Block faulting and uplift of the seamount, together with the removal by submarine erosion of extrusive rocks capping the seamount, have resulted in the exposure of the more deep-seated metamorphosed horizons along the fault scarps. The block-faulted nature of Bald Mountain, indicative of brittle fracturing of the upper crustal layers of the Mid-Atlantic Ridge, may be a result of the low ocean floor spreading rates implied from age determinations and magnetic anomaly patterns at 45° N.
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: 45.282885 * Median Longitude: -28.526378 * South-bound Latitude: 45.198793 * West-bound Longitude: -28.935482 * North-bound Latitude: 45.366667 * East-bound Longitude: -28.033333
Date/Time Start: 1966-08-11T00:00:00 * Date/Time End: 1966-09-21T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
HUD66/19-9 * Latitude: 45.350000 * Longitude: -28.033333 * Date/Time: 1966-08-11T00:00:00 * Elevation: -2170.0 m * Location: Atlantic Ocean * Campaign: HUD66/19 (BI 19-66 – Phase 2) * Basis: Hudson * 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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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 | Aumento, Fabrizio | |||
| 2 | Identification | ID | Aumento, Fabrizio | |||
| 3 | DEPTH, sediment/rock | Depth sed | m | Aumento, Fabrizio | Geocode | |
| 4 | Position | Position | Aumento, Fabrizio | Visual description | ||
| 5 | Deposit type | Deposit type | Aumento, Fabrizio | |||
| 6 | Quantity of deposit | Quantity | Aumento, Fabrizio | |||
| 7 | Size | Size | Aumento, Fabrizio | |||
| 8 | Substrate type | Substrate | Aumento, Fabrizio | |||
| 9 | Description | Description | Aumento, Fabrizio | |||
| 10 | File name | File name | Aumento, Fabrizio | |||
| 11 | Uniform resource locator/link to image | URL image | Aumento, Fabrizio |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
82 data points
Data
| 1 Event | 2 ID | 3 Depth sed [m] | 4 Position | 5 Deposit type | 6 Quantity | 7 Size | 8 Substrate | 9 Description | 10 File name | 11 URL image |
|---|---|---|---|---|---|---|---|---|---|---|
| HUD66/19-9C | HUD66/19-9-C1 | 0 | Surface | Mn coating | Many | Boulder; basalt | Photograph. Numerous angular basalt boulders with Mn coating | Fig1_Aumento_1969.jpg | Fig1_Aumento_1969.jpg | |
| HUD66/19-9 | HUD66/19-9-1 | 0 | Surface | Mn coating | Many | Up to 0.1 cm thick | Boulder; basalt | Many angular basalt boulders. No weathering. Thin to no Mn coating (up to 0.1 cm). Seamount of western slope of MRV | ||
| HUD66/19-14C | HUD66/19-14-C1 | 0 | Surface | Mn coating | Many | Boulder; erratics | Photograph. Bald mountain top flat surface littered with erratic boulders and cobbles with Mn coating | Fig2_Aumento_1969.jpg | Fig2_Aumento_1969.jpg | |
| HUD66/19-14 | HUD66/19-14-1 | 0 | Surface | Mn coating | Several | 0.1 cm thick | Boulder; erratics | Subangular glacial erratic biotite granodiorite and gabbro boulders. Thin Mn coating (0.1 cm). Bald mountain. | ||
| HUD66/19-33C | HUD66/19-33-C1 | 0 | Surface | Mn coating | Many | Rock; basalt | Photo-mosaic showing a massive basaltic cliff with Mn coating | Fig3_Aumento_1969.jpg | Fig3_Aumento_1969.jpg | |
| HUD66/19-33 | HUD66/19-33-1 | 0 | Surface | Mn coating | Several | Up to 0.1 cm thick | Boulder; erratics | Subangular glacial erratic diorite or biotite gneiss boulders. Thin Mn coating ( up to 0.1 cm). Bald mountain. | ||
| HUD66/19-33 | HUD66/19-33-1 | 0 | Surface | Mn coating | Several | Up to 1.0 cm thick | Boulder; basalt | Sub-angular to rounded basalt boulders with no apparent weathering. Thick Mn coating ( up to 1.0 cm). Bald mountain. | ||
| HUD66/19-35 | HUD66/19-35-1 | 0 | Surface | Mn coating | Several | Up to 0.1 cm thick | Boulder; metamorphic | Sub-angular metamophosed limestone boulders with thin Mn coating ( Up to 0.1 cm). Bald mountain. | ||
| HUD66/19-47C | HUD66/19-47-C1 | 0 | Surface | Mn coating | Several | Thick | Boulder; weathered basalt | Photograph. Remains of basaltic pillows with thick Mn coating among corals and various calcareous debris | Fig4_Aumento_1969.jpg | Fig4_Aumento_1969.jpg |
| HUD66/19-47 | HUD66/19-47-1 | 0 | Surface | Mn coating | Several | 0.1-0.2 cm thick | Boulder; basalt | Rounded pillow basalt, weathered on its outer zone (0.2 cm). With Mn coating (0.1-0.2 cm). Confederation peak. | ||
| HUD66/19-48 | HUD66/19-48-1 | 0 | Surface | Mn coating | Several | 0.1 cm thick | Boulder; basalt | Sub-angular basalt boulders, severely wetahered. With Mn coating (0.1 cm). Confederation peak. |
