Maxwell, Arthur E; von Herzen, Richard P; Andrews, James E; Boyce, Robert E; Milow, E Dean; Hsü, Kenneth J; Percival, Stephen F Jr; Saito, T (1970): Annotated record of the detailed examination of Mn deposits from DSDP Site 20, Leg 3 (Holes 3-20, 3-20A and 3-20C) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.865331
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Abstract:
Prior to arrival on this site, the only survey data available was from the Vema-20 crossing of the area. The recommended site location was over a relatively smooth valley in the bottom topography at about 4750 meters (15,580 feet) depth (uncorrected), about 10 kilometers wide E-W between peaks (or ridges) on either side. Sediment thickness was unknown. The center of the valley is near the peak of a wide (40 to 50 kilometers) positive magnetic anomaly, identified as Magnetic Anomaly 30 in the hypothesized geomagnetic time scale with an age of 72 million years.
Related to:
Maxwell, Arthur E; von Herzen, Richard P; Andrews, James E; Boyce, Robert E; Milow, E Dean; Hsü, Kenneth J; Percival, Stephen F Jr; Saito, T (1970): Site 20. In: Maxwell, A.E., et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Government Print Office), 3, 319-366, https://doi.org/10.2973/dsdp.proc.3.110.1970
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):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -28.525067 * Median Longitude: -26.844667 * South-bound Latitude: -28.526200 * West-bound Longitude: -26.845500 * North-bound Latitude: -28.524500 * East-bound Longitude: -26.843000
Date/Time Start: 1969-01-09T00:00:00 * Date/Time End: 1969-01-09T00:00:00
Minimum DEPTH, sediment/rock: 0.0 m * Maximum DEPTH, sediment/rock: 74.7 m
Event(s):
3-20 * Latitude: -28.526200 * Longitude: -26.843000 * Date/Time: 1969-01-09T00:00:00 * Elevation: -4500.0 m * Penetration: 6.4 m * Recovery: 6 m * Location: South Atlantic/VALLEY * Campaign: Leg3 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 6.4 m cored; 0 m drilled; 93.8 % recovery
3-20A * Latitude: -28.524500 * Longitude: -26.845500 * Date/Time: 1969-01-09T00:00:00 * Elevation: -4518.0 m * Penetration: 64 m * Recovery: 11 m * Location: South Atlantic/VALLEY * Campaign: Leg3 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 4 cores; 25.8 m cored; 0 m drilled; 42.6 % recovery
3-20C * Latitude: -28.524500 * Longitude: -26.845500 * Date/Time: 1969-01-09T00:00:00 * Elevation: -4506.0 m * Penetration: 72.3 m * Recovery: 48.6 m * Location: South Atlantic/VALLEY * Campaign: Leg3 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 7 cores; 50.5 m cored; 0 m drilled; 96.2 % recovery
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 | Maxwell, Arthur E | |||
| 2 | Date/Time of event | Date/Time | Maxwell, Arthur E | |||
| 3 | Latitude of event | Latitude | Maxwell, Arthur E | |||
| 4 | Longitude of event | Longitude | Maxwell, Arthur E | |||
| 5 | Elevation of event | Elevation | m | Maxwell, Arthur E | ||
| 6 | Sample ID | Sample ID | Maxwell, Arthur E | |||
| 7 | Sample code/label | Sample label | Maxwell, Arthur E | DSDP/ODP/IODP sample designation | ||
| 8 | DEPTH, sediment/rock | Depth sed | m | Maxwell, Arthur E | Geocode | |
| 9 | Position | Position | Maxwell, Arthur E | |||
| 10 | Deposit type | Deposit type | Maxwell, Arthur E | |||
| 11 | Quantity of deposit | Quantity | Maxwell, Arthur E | |||
| 12 | Substrate type | Substrate | Maxwell, Arthur E | |||
| 13 | Sediment type | Sediment | Maxwell, Arthur E | |||
| 14 | Comment | Comment | Maxwell, Arthur E | |||
| 15 | Description | Description | Maxwell, Arthur E |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
25 data points