Commeau, J A; Manheim, Frank T (1982): Chemical composition of oxide-phosphorite pavement from the Blake Plateau under various preparation treatment [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.854202, Supplement to: Commeau, JA; Manheim, FT (1982): Testing the variation of Fe-Mn concentration as a function of preparation treatment for phosphate-manganese nodules from the Blake Plateau. (Expedition GYRE 82-11), Cruise Note. USGS Woods Hole Coastal and Marine Science Center
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Abstract:
Sample preparation technique is critical for valid chemical analyses. A main source of error comes from the fact that the great specific surface area of crusts or nodules enhances their tendency to retain or attract hygroscopic moisture. Variable treatment of this moisture can in extreme cases lead to analytical value differences as great as 40-50 %. In order to quantify these influences, samples of ferromanganese oxide-phosphorite pavement from the Blake Plateau have been subjected to various drying techniques before analysis using X-ray fluorescence.
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:
Log sheet (preliminary information) of sample drying, GYRE82-11 Expedition (1982). USGS Woods Hole Coastal and Marine Science Center, hdl:10013/epic.46138.d083
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: 31.392916 * Median Longitude: -78.162008 * South-bound Latitude: 30.714830 * West-bound Longitude: -78.993000 * North-bound Latitude: 32.308330 * East-bound Longitude: -77.370000
Date/Time Start: 1982-09-19T00:00:00 * Date/Time End: 1982-09-26T00:00:00
Minimum Elevation: -952.0 m * Maximum Elevation: -549.0 m
Event(s):
GYRE82-11-C06 (C6-Sta3) * Latitude: 32.198330 * Longitude: -77.731660 * Date/Time: 1982-09-20T00:00:00 * Elevation: -549.0 m * Location: Blake Plateau, Atlantic Ocean * Campaign: GYRE82-11 (82034 G-11-82-SE) * Basis: Gyre * Method/Device: Gravity corer (GC) * Comment: Institute: USGSWH
Comment:
Samples were ground to powder in their natural hygroscopic moisture before being treated. The Mn, FE and Ca concentrations are given after ignition at 1000°C.
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 | Commeau, J A | |||
| 2 | Date/Time of event | Date/Time | Commeau, J A | |||
| 3 | Elevation of event | Elevation | m | Commeau, J A | ||
| 4 | Latitude of event | Latitude | Commeau, J A | |||
| 5 | Longitude of event | Longitude | Commeau, J A | |||
| 6 | Sample ID | Sample ID | Commeau, J A | |||
| 7 | Manganese | Mn | % | Commeau, J A | X-ray fluorescence (XRF) | |
| 8 | Iron | Fe | % | Commeau, J A | X-ray fluorescence (XRF) | |
| 9 | Calcium | Ca | % | Commeau, J A | X-ray fluorescence (XRF) | |
| 10 | Loss on drying | LOD | % | Commeau, J A | Oven-dry, heated at 110°C overnight | |
| 11 | Loss on drying | LOD | % | Commeau, J A | Heated at 500°C for one hour | |
| 12 | Loss on ignition | LOI | % | Commeau, J A | Ignited at 1000°C for one hour | |
| 13 | Description | Description | Commeau, J A | of composite samples |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
128 data points
Data
| 1 Event | 2 Date/Time | 3 Elevation [m] | 4 Latitude | 5 Longitude | 6 Sample ID | 7 Mn [%] (X-ray fluorescence (XRF)) | 8 Fe [%] (X-ray fluorescence (XRF)) | 9 Ca [%] (X-ray fluorescence (XRF)) | 10 LOD [%] (Oven-dry, heated at 110°C ove...) | 11 LOD [%] (Heated at 500°C for one hour) | 12 LOI [%] (Ignited at 1000°C for one hour) | 13 Description (of composite samples) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GYRE82-11-D01 | 1982-09-19 | -550 | 32.3083 | -77.6833 | D-1 | 0.2514 | 8.800 | 21.6 | 2.030 | 5.690 | 15.74 | Phosphate |
| GYRE82-11-D02 | 1982-09-21 | -825 | 31.7117 | -77.4900 | D-2 | 0.0290 | 1.330 | 24.2 | 2.410 | 2.670 | 29.71 | Carbonate + Mn-Fe slab |
| GYRE82-11-D03 | 1982-09-21 | -892 | 31.6483 | -77.4267 | D-3 | 0.0320 | 1.570 | 23.0 | 1.690 | 3.670 | 26.97 | Phosphate |
| GYRE82-11-D04 | 1982-09-21 | -891 | 31.6717 | -77.4033 | D-4 | 0.0710 | 4.950 | 24.6 | 3.270 | 6.830 | 18.61 | Phosphate + carbonate |
| GYRE82-11-D05 | 1982-09-22 | -952 | 31.5570 | -77.3700 | D-5 | 6.7200 | 10.960 | 18.4 | 5.770 | 10.060 | 25.44 | Phosphate + carbonate |
| GYRE82-11-D08 | 1982-09-23 | -635 | 31.4100 | -78.5100 | D-8 | 6.8700 | 19.300 | 13.6 | 3.520 | 11.200 | 22.79 | Phosphate with Mn coating |
| GYRE82-11-D09 | 1982-09-24 | -796 | 31.0220 | -78.3870 | D-9 | 17.0800 | 11.510 | 10.7 | 9.460 | 17.260 | 30.85 | Nodule + slab |
| GYRE82-11-D10 | 1982-09-24 | -800 | 31.0170 | -78.3902 | D-10 | 12.3500 | 8.200 | 16.9 | 6.520 | 13.130 | 33.46 | Mn nodule |
| GYRE82-11-D11 | 1982-09-25 | -840 | 30.9970 | -78.3550 | D-11 | 13.7300 | 10.600 | 16.2 | 6.540 | 14.790 | 33.00 | Mn nodule |
| GYRE82-11-D12 | 1982-09-26 | -670 | 31.1233 | -78.9433 | D-12 | 1.9900 | 8.340 | 17.6 | 2.080 | 6.340 | 22.95 | Phosphate nodule + carbonate |
| GYRE82-11-D14 | 1982-09-26 | -718 | 31.1050 | -78.8420 | D-14 | 13.4300 | 13.320 | 13.3 | 6.880 | 14.680 | 32.57 | Mn-phospahte plates |
| GYRE82-11-D15 | 1982-09-26 | -777 | 31.0080 | -78.9930 | D-15 | 10.2200 | 8.900 | 17.9 | 5.160 | 11.750 | 34.36 | Mn slabs with some carbonate |
| GYRE82-11-D16 | 1982-09-26 | -783 | 30.8692 | -78.8245 | D-16 | 0.0290 | 0.150 | 22.2 | 0.312 | 3.530 | 44.62 | Carbonate |
| GYRE82-11-D17 | 1982-09-26 | -835 | 30.7148 | -78.6305 | D-17 | 1.7700 | 0.569 | 24.2 | 2.310 | 5.780 | 33.64 | Carbonate + Mn-Fe slab |
| GYRE82-11-C06 | 1982-09-20 | -549 | 32.1983 | -77.7317 | C-6 | 0.8140 | 2.960 | 22.3 | 1.680 | 3.800 | 23.06 | Phosphate |
| GYRE82-11-C09 | 1982-09-23 | -719 | 31.9250 | -77.6117 | C-9 | 5.9300 | 4.420 | 23.1 | 3.160 | 7.130 | 25.05 | Phosphate_Mn |