Hoffert, Michel; Perseil, E A; Hekinian, Roger; Choukroune, P; Needham, H D; Francheteau, Jean; Le Pichon, Xavier (2023): Chemical analyses of hydrothermal deposits and associated material from Transform fault 'A' on the Mid-Atlantic Ridge, FAMOUS area [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.961652
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Published: 2023-08-21 • DOI registered: 2023-09-26
Abstract:
Sampled hydrothermal deposits from Transform fault 'A' on the Mid-Atlantic Ridge have been classified into two main categories according to the relative proportion of the black Fe-Mn concretions with respect to the clay-rich fraction: clay-rich hydrothermal material and black Fe-Mn concretions (nodules). These materials have been analysed for their chemical composition by arc spectrometry using an ARL quantometer were made at the University of Strasbourg. This method consists of melting the sample in a mixture of lithium tetraborate and then introducing the melt into in a glycolated solvent prior analysis. Trace elements were determined using graphite discs . Na and K were determined by emission spectrometry (precision of +- 2.0%).
Related to:
Choukroune, P; Francheteau, Jean; Le Pichon, Xavier (1978): In situ structural observations along Transform Fault A in the FAMOUS area, Mid-Atlantic Ridge. Geological Society of America Bulletin, 89(7), 1013, https://doi.org/10.1130/0016-7606(1978)89%3C1013:ISSOAT%3E2.0.CO;2
Hoffert, M; Perseil, E A; Hekinian, Roger; Choukroune, P; Needham, H D; Francheteau, Jean; Le Pichon, Xavier (1978): Hydrothermal deposits sampled by diving saucer in transform fault "A" near 37°N on the Mid-Atlantic Ridge, FAMOUS Area. Oceanologica Acta, 1(1), 699-712, publication-5216.pdf
Hoffert, Michel; Perseil, E A; Hekinian, Roger; Choukroune, P; Needham, H D; Francheteau, Jean; Le Pichon, Xavier (2023): Chemical analyses of Fe-Mn coatings separated from the margins of basaltic rocks from Transform Fault 'A' and from the the Rift Valley near 36°50'N in the Mid-Atlantic Ridge [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.961653
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: 36.942125 * Median Longitude: -33.063630 * South-bound Latitude: 36.940833 * West-bound Longitude: -33.067000 * North-bound Latitude: 36.945000 * East-bound Longitude: -33.061500
Date/Time Start: 1974-07-24T00:00:00 * Date/Time End: 1974-08-03T00:00:00
Minimum Elevation: -2695.0 m * Maximum Elevation: -2690.0 m
Event(s):
CY-74-23-12 * Latitude: 36.941000 * Longitude: -33.061500 * Date/Time: 1974-07-24T00:00:00 * Elevation: -2695.0 m * Location: Mid-Atlantic Ridge * Campaign: FAMOUS_06-74 (FAMOUS74) * Basis: Le Noroit * Method/Device: Grab, on Cyana [Submersible] (GRAB_subCyana)
CY-74-26-14 * Latitude: 36.945000 * Longitude: -33.067000 * Date/Time: 1974-08-01T00:00:00 * Elevation: -2690.0 m * Location: Mid Atlantic Ridge * Campaign: FAMOUS_06-74 (FAMOUS74) * Basis: Le Noroit * Method/Device: Grab, on Cyana [Submersible] (GRAB_subCyana)
CY-74-26-15 * Latitude: 36.941667 * Longitude: -33.062667 * Date/Time: 1974-08-03T00:00:00 * Elevation: -2690.0 m * Location: Mid-Atlantic Ridge * Campaign: FAMOUS_06-74 (FAMOUS74) * Basis: Le Noroit * Method/Device: Grab, on Cyana [Submersible] (GRAB_subCyana)
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.
This dataset represents the digitized Table 2, pp. 706 of the related publication.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | Identification | ID | Hoffert, Michel | |||
| 6 | Sample type | Samp type | Hoffert, Michel | |||
| 7 | Silicon dioxide | SiO2 | % | Hoffert, Michel | Arc spectrometry | |
| 8 | Aluminium oxide | Al2O3 | % | Hoffert, Michel | Arc spectrometry | |
| 9 | Iron oxide, Fe2O3 | Fe2O3 | % | Hoffert, Michel | Arc spectrometry | |
| 10 | Manganous manganic oxide | Mn3O4 | % | Hoffert, Michel | Arc spectrometry | |
| 11 | Magnesium oxide | MgO | % | Hoffert, Michel | Arc spectrometry | |
| 12 | Calcium oxide | CaO | % | Hoffert, Michel | Arc spectrometry | |
| 13 | Sodium oxide | Na2O | % | Hoffert, Michel | Optical emission spectrography | |
| 14 | Potassium oxide | K2O | % | Hoffert, Michel | Optical emission spectrography | |
| 15 | Titanium(II) oxide | TiO | % | Hoffert, Michel | Optical emission spectrography | |
| 16 | Loss on ignition | LOI | % | Hoffert, Michel | Wet chemistry | at 1000°C |
| 17 | Strontium | Sr | mg/kg | Hoffert, Michel | Optical emission spectrography | |
| 18 | Barium | Ba | mg/kg | Hoffert, Michel | Optical emission spectrography | |
| 19 | Vanadium | V | mg/kg | Hoffert, Michel | Optical emission spectrography | |
| 20 | Nickel | Ni | mg/kg | Hoffert, Michel | Optical emission spectrography | |
| 21 | Cobalt | Co | mg/kg | Hoffert, Michel | Optical emission spectrography | |
| 22 | Chromium | Cr | mg/kg | Hoffert, Michel | Optical emission spectrography | |
| 23 | Boron | B | mg/kg | Hoffert, Michel | Optical emission spectrography | |
| 24 | Zinc | Zn | mg/kg | Hoffert, Michel | Optical emission spectrography | |
| 25 | Gallium | Ga | mg/kg | Hoffert, Michel | Optical emission spectrography | |
| 26 | Copper | Cu | mg/kg | Hoffert, Michel | Optical emission spectrography | |
| 27 | Description | Description | Hoffert, Michel |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
270 data points