Moore, Theodore C; Rabinowitz, Philip D; Borella, Peter E; Boersma, Anne; Shackleton, Nicholas J (1984): Annotated record of the detailed examination of Mn deposits from DSDP Leg 74 (Holes 527, 528, 528A, 529) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.874817
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Abstract:
The drilling plan for Leg 74 of the Deep Sea Drilling Project was designed to address three main scientific topics: (1) the history of the deep-water circulation in the southeastern Atlantic, (2) the nature and geologic evolution of the Walvis Ridge, and (3) the biostratigraphy and magnetic stratigraphy of this region. In order to study these subjects, a suite of five sites was drilled on the Walvis Ridge that extended from its crest (near 1000 m water depth) down its northwest flank into the Angola Basin to a depth of 4400 m.
Related to:
Richardson, Stephen H; O'Connell, Suzanne B; Manivit, Helene; Lever, Andrew; Kleinert, Klaus; Jiang, Ming Jung; Fütterer, Dieter K; Duee, Gerard; Chave, Alan D; Moore, Theodore C; Rabinowitz, Philip D; Borella, Peter E; Boersma, Anne; Shackleton, Nicholas J (1984): Initial Reports of the Deep Sea Drilling Project. U.S. Government Printing Office, LXXIV, 894 pp, https://doi.org/10.2973/dsdp.proc.74.1984
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: -28.504025 * Median Longitude: 2.292875 * South-bound Latitude: -28.930500 * West-bound Longitude: 1.763300 * North-bound Latitude: -28.041500 * East-bound Longitude: 2.768000
Date/Time Start: 1980-06-28T00:00:00 * Date/Time End: 1980-07-18T00:00:00
Minimum DEPTH, sediment/rock: 122.18 m * Maximum DEPTH, sediment/rock: 335.56 m
Event(s):
74-527 * Latitude: -28.041500 * Longitude: 1.763300 * Date/Time: 1980-06-28T00:00:00 * Elevation: -4428.0 m * Penetration: 384.5 m * Recovery: 243.4 m * Location: South Atlantic * Campaign: Leg74 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 380 m cored; 4.5 m drilled; 64.1 % recovery
74-528 * Latitude: -28.524800 * Longitude: 2.324000 * Date/Time: 1980-07-04T00:00:00 * Elevation: -3800.0 m * Penetration: 555 m * Recovery: 271.9 m * Location: South Atlantic/RIDGE * Campaign: Leg74 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 47 cores; 441 m cored; 0 m drilled; 61.7 % recovery
74-528A * Latitude: -28.519300 * Longitude: 2.316200 * Date/Time: 1980-07-04T00:00:00 * Elevation: -3815.0 m * Penetration: 130.5 m * Recovery: 111.8 m * Location: South Atlantic/RIDGE * Campaign: Leg74 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 29 cores; 126.1 m cored; 0 m drilled; 88.7 % 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 | ||||
| 2 | Identification | ID | ||||
| 3 | Sample code/label | Sample label | ||||
| 4 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 5 | Position | Position | Visual description | |||
| 6 | Deposit type | Deposit type | ||||
| 7 | Quantity of deposit | Quantity | ||||
| 8 | Size | Size | ||||
| 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:
74 data points
Data
| 1 Event | 2 ID | 3 Sample label | 4 Depth sed [m] | 5 Position | 6 Deposit type | 7 Quantity | 8 Size | 9 Substrate | 10 Sediment | 11 Comment | 12 Description |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 74-527 | 74-527-26-2,42-1 | 74-527-26-2,42 | 219.92 | In sediment | Mn micronodule | Several | Large | Chalk | Yellowish gray nannofossil chalk (Middle Paleocene) | Interspersed throughout the cores were many black nodular or concretionary grains, which we suspected to be a large Mn micronodules. Amorphous black material, Mn oxide(?), psilomelane(?) (Site 527, Core 26, Cored interval: 218.0-227.5 m, page 273) | |
| 74-527 | 74-527-27-2,65-1 | 74-527-27-2,65 | 229.65 | In sediment | Mn micronodule | Several | Chalk | Pinkish white nannofossil chalk (Middle Paleocene) | Black Mn? concretions or micronodules are present throughout (Site 527, Core 27, Cored interval: 227.5-237.0 m, page 274) | ||
| 74-527 | 74-527-29-1,60-1 | 74-527-29-1,60 | 247.10 | In sediment | Mn micronodule | Several | Chalk | Light gray nannofossil chalk (Paleocene) | Some black possibly MnO micronodules or concretion are observed (Site 527, Core 29, Cored interval: 246.5-256.0 m, page 275) | ||
| 74-527 | 74-527-34-1,80-1 | 74-527-34-1,80 | 294.80 | In sediment | Mn micronodule | Several | Mudstone | Pink to light reddish brown nannofossil mudstone (Upper Maestrichtian) | Black micronodules which give an amorphous x-ray diffraction pattern are present (Site 527, Core 34, Cored interval: 294.0-303.5 m, page 277) | ||
| 74-528 | 74-528-24-4,6-1 | 74-528-24-4,6 | 335.56 | Buried | Mn nodule | 1 | Ooze | Alternating beds of nannofossil ooze and chalk (Upper Paleocene) | A suspected Mn-nodule from Core24 was ground and analyzed, and the X-ray diff showed calcite and rhodochrosite. Prob. presence of amorphous Mn-oxide in the amorphous phase. (Site 528, Core 24, Cored interval: 331.0-340.5 m, page 342) | ||
| 74-528A | 74-528A-29-1,48-1 | 74-528A-29-1,48 | 122.18 | Buried | Mn nodule | Several | Ooze | Pinkish gray nannofossil ooze (Tertiary) | Black patches are found the most noticeable at 48 cm. They are MnO concretions, mixed with CaCO3 (Site 528A, Core 29, Cored interval: 121.7-126.1 m, page 375) | ||
| 74-528A | 74-528A-30-2,40-1 | 74-528A-30-2,40 | 128.00 | Buried | Mn nodule | Several | Ooze | Pinkish white to gray foraminifer nannofossil ooze | Section 2 contains some diffuse black blelbs which are interpreted to be MnO2 concretions. They are poorly consolidated. (Site 528A, Core 30, Cored interval: 126.6-130.5 m, page 376) | ||
| 74-529 | 74-529-14-2,80-1 | 74-529-14-2,80 | 124.80 | Buried | Mn nodule | Several | Core; worm burrow | Ooze | Pinkish gray to light olive gray foraminifer nannofossil ooze (Upper Oligocene) | Dark (black) crusty burrows or nodules are found in several places of core (Site 529, Core 14, Cored interval: 122.5-132.0 m, page 431) | |
| 74-529 | 74-529-15-4,80-1 | 74-529-15-4,80 | 137.30 | Buried | Mn nodule | 1 | Ooze | Pinkish gray foraminifer nannofossil ooze (Upper Oligocene) | Mn nodule (Site 529, Core 15, Cored interval: 132.0-141.5 m, page 432) |