Malfait, Bruce Terry (1974): Annotated record of the detailed examination of a Mn deposits from the Carnegie Ridge in the Pacific Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.876539, Supplement to: Malfait, BT (1975): The Carnegie Ridge near 86⁰ W. : structure, sedimentation and near bottom observations. Ph. D. Dissertation), Oregon State University, USA, 142 pp, hdl:1957/28552
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Abstract:
The Carnegie Ridge is a linear, aseismic, submarine ridge lying between the Galapagos Islands and the coast of South America. Surface ship, near bottom, and grain size studies from the saddle have been used to delineate the present geological environment and history of the ridge. Structurally the Carnegie Ridge is rather simple in profile, being bounded by east-west trending scarps which give the ridge a block-faulted appearance. Acoustic basement over the ridge appears smooth on reflection profiles and is composed of chert. The sedimentary sequence above the chert horizon contains a lower chalk unit overlain by calcareous ooze. Where erosion has exposed the chalk a karst-like micro-topography is present which is characterized by steep walled channels and cliffs and consolidated bed forms undergoing erosion and dissolution. The ridge crest has been stripped of almost its entire sediment cover. Thick sequences of sediment are found only in areas protected from north or south flowing bottom currents. Evidence of erosion is provided by extensive channeling on both the north and south flanks of the ridge. Near bottom observations in one channel on the north flank revealed a large field of sand dunes indicating northward, downslope sediment transport. These dunes are found on manganese-encrusted chalk which floors the channel.
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: -1.197238 * Median Longitude: -85.511857 * South-bound Latitude: -1.400000 * West-bound Longitude: -85.703333 * North-bound Latitude: -0.727000 * East-bound Longitude: -85.298000
Date/Time Start: 1971-10-01T00:00:00 * Date/Time End: 1971-10-11T00:00:00
Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 6.700 m
Event(s):
Y71-03-20 (MG1) * Latitude: -1.335000 * Longitude: -85.323000 * Date/Time: 1971-10-08T00:00:00 * Elevation: -2310.0 m * Campaign: Y71-03 * Basis: Yaquina * Method/Device: Piston corer (PC)
Y71-03-21C * Latitude: -1.316667 * Longitude: -85.613333 * Date/Time: 1971-10-01T00:00:00 * Elevation: -2417.0 m * Location: Carnegie Ridge, Pacific Ocean * Campaign: Y71-03 * Basis: Yaquina * Method/Device: Photo/Video (PV)
Y71-03-26PC * Latitude: -0.877000 * Longitude: -85.298000 * Date/Time: 1971-10-10T00:00:00 * Elevation: -2521.0 m * Recovery: 2.57 m * Location: Carnegie Ridge, Pacific Ocean * Campaign: Y71-03 * Basis: Yaquina * Method/Device: Piston corer (PC)
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 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Depth, top/min | Depth top | m | |||
| 5 | Depth, bottom/max | Depth bot | m | |||
| 6 | Position | Position | Visual description | |||
| 7 | Deposit type | Deposit type | ||||
| 8 | Quantity of deposit | Quantity | ||||
| 9 | Size | Size | ||||
| 10 | Substrate type | Substrate | ||||
| 11 | Comment | Comment | ||||
| 12 | Description | Description | ||||
| 13 | File name | File name | ||||
| 14 | Uniform resource locator/link to image | URL image |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
112 data points
Data
| 1 Event | 2 ID | 3 Depth sed [m] | 4 Depth top [m] | 5 Depth bot [m] | 6 Position | 7 Deposit type | 8 Quantity | 9 Size | 10 Substrate | 11 Comment | 12 Description | 13 File name | 14 URL image |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Y71-03-20 | Y71-03-20-1 | 0.300 | 0.00 | 0.60 | Buried | Mn nodule | 1 | Yellowish gray sand and clay | Indurated Fe-Mn nodule | ||||
| Y71-03-20 | Y71-03-20-2 | 6.700 | 6.40 | 7.00 | Buried | Mn nodule | 1 | Yellowish gray clay with black masses of metallic grains | Indurated Fe-Mn nodule | ||||
| Y71-03-20 | Y71-03-20-3 | 1.195 | 1.19 | 1.20 | Buried | Mn crust | 1 | Consolidated sediment | Mottled yellow silty clay | Mn accretion mass | |||
| Y71-03-20 | Y71-03-20-4 | 1.850 | 1.85 | 1.85 | Buried | Mn crust | 1 | Consolidated sediment | Mottled white nannofossil chalk ooze | Mn accretion mass | |||
| Y71-03-20 | Y71-03-20-5 | 3.865 | 3.69 | 4.04 | Buried | Mn crust | Several | Consolidated sediment | Mottled pale yellow slightly silty clay | Mn accretions | |||
| Y71-03-20 | Y71-03-20-6 | 4.280 | 4.24 | 4.32 | Buried | Mn crust | Several | Consolidated sediment | Dark brown and black partially indurated silt | Mn accretions | |||
| Y71-03-26PC | Y71-03-26PC-1 | 0.000 | 0.00 | 0.00 | Surface | Mn nodule | Small | Light yellowish brown clay | Small manganese nodule lodged in the nose of the gravity core | ||||
| Y71-03-32 | Y71-03-32-1 | 0.000 | 0.00 | 0.00 | Surface | Mn nodule | Several | Light yellowish brown sand with numerous forams, | Basalt pebbles and manganese nodules | ||||
| Y71-03-21C | Y71-03-21C-1 | 0.000 | 0.00 | 0.00 | Surface | Mn coating | Several | Rock; chalk | Foraminifera sand | Fractured plates of lithified sediments with nodular surface covered what appears to be manganese | Fig21A_Malfait_1975.jpg | Fig21A_Malfait_1975.jpg | |
| Y71-03-30C | Y71-03-30C-1 | 0.000 | 0.00 | 0.00 | Surface | Mn coating | Several | Rock; chalk | Foraminifera sand | Rubble pavement of lithified chalk covered with manganese | Fig30B_Malfait_1975.jpg | Fig30B_Malfait_1975.jpg | |
| Y71-03-32C | Y71-03-32C-1 | 0.000 | 0.00 | 0.00 | Surface | Mn coating | Several | Thin | Rock; chalk | Clayey sand | Stereoscopic pair showing outcrop of chalk apparently coated by thin layer of manganese | Fig32_Malfait_1975.jpg | Fig32_Malfait_1975.jpg |
| Y71-03-34C | Y71-03-34C-1 | 0.000 | 0.00 | 0.00 | Surface | Mn nodule | Many | Foraminifera sand | Pavement of manganese nodules between elongated masses of lithified sediment | Fig34_Malfait_1975.jpg | Fig34_Malfait_1975.jpg |
