Citation:

PANGAEA.956428

Name: Radiochemical data for manganese crust sample CYP-74-26-12
Creator: Claude Lalou
Published: 2023-03-14
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

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Published: 2023-03-14 • DOI registered: 2023-04-12

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Abstract:

Scoriaceous Mn crust fragments on travertine-like nontronite deposit were retrieved near two hydrothermal vents while surveying the rift valley of the Mid-Atlantic Ridge using the diving saucer "CYANA". They have been examined with SEM and with an EDAX (X-ray energy dispersive analysis) apparatus coupled to SEM. Fifteen successive thin layers were taken from the upper surface downward. They were totally dissolved in HCl-HF-HClO4 and spiked with 232U and 228Th as yield tracers. Thin sources of purified U::and Th were prepared and counted by alpha spectrometry.

Keyword(s):

Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

Related to:

Lalou, Claude; Brichet, Evelyne; Ku, Teh-Lung; Jehanno, Celestine (1977): Radiochemical, scanning electron microscope (SEM) and X-ray dispersive energy (EDAX) studies of a FAMOUS hydrothermal deposit. Marine Geology, 24(4), 245-258, https://doi.org/10.1016/0025-3227(77)90070-6

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):

NOAA and MMS Marine Minerals Geochemical Database (NOAA-MMS)

Coverage:

Latitude: 36.940833 * Longitude: -33.063344

Date/Time Start: 1974-08-03T00:00:00 * Date/Time End: 1974-08-03T00:00:00

Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m

Event(s):

CY-74-26-12 * Latitude: 36.940833 * Longitude: -33.063344 * Date/Time: 1974-08-03T00:00:00 * Elevation: -2690.0 m * Location: Mid-Atlantic Ridge * Campaign: (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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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 II, pp. 253 of the related publication.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Lalou, Claude
2	Latitude of event	Latitude		Lalou, Claude
3	Longitude of event	Longitude		Lalou, Claude
4	Elevation of event	Elevation	m	Lalou, Claude
5	Identification	ID		Lalou, Claude
6	Deposit type	Deposit type		Lalou, Claude
7	DEPTH, sediment/rock	Depth sed	m	Lalou, Claude		Geocode
8	Distance	Dist	mm	Lalou, Claude		from outer layer/surface
9	Distance, minimum	Dist min	mm	Lalou, Claude
10	Distance, maximum	Dist max	mm	Lalou, Claude
11	Uranium-238	238U	mg/kg	Lalou, Claude	Alpha spectrometry
12	Uranium-238, standard deviation	238U std dev	±	Lalou, Claude	Alpha spectrometry
13	Uranium-234/Uranium-238 ratio	234U/238U		Lalou, Claude	Alpha spectrometry
14	Uranium-234/Uranium-238 ratio, standard deviation	234U/238U std dev	±	Lalou, Claude	Alpha spectrometry
15	Thorium-230	230Th	mg/kg	Lalou, Claude	Alpha spectrometry
16	Thorium-230, standard deviation	230Th std dev	±	Lalou, Claude	Alpha spectrometry
17	Thorium-230/Uranium-234 ratio	230Th/234U		Lalou, Claude	Alpha spectrometry
18	Thorium-230/Uranium-234 ratio, standard deviation	230Th/234U std dev	±	Lalou, Claude	Alpha spectrometry
19	Thorium-232	232Th	mg/kg	Lalou, Claude	Alpha spectrometry
20	Thorium-232, standard deviation	232Th std dev	±	Lalou, Claude	Alpha spectrometry
21	Uranium-238/Thorium-232 ratio	238U/232Th		Lalou, Claude	Alpha spectrometry
22	Uranium-238/Thorium-232 ratio, standard deviation	238U/232Th std dev	±	Lalou, Claude	Alpha spectrometry

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

253 data points

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Datasets with similar metadata

Lalou, C; Ku, T-L; Brichet, E et al. (1979): (Table 3, page 265), Radiochemical data for layers of zones A through D of the TECHNO crust. https://doi.org/10.1594/PANGAEA.855051
Moore, WS; Ku, T-L; MacDougall, JD et al. (2023): Radiochemical data for a manganese nodule sample from the MN7601-PLEIADES campaign (R/V Melville). https://doi.org/10.1594/PANGAEA.959682
Lalou, C; Ku, T-L; Brichet, E et al. (1979): (Table 2, page 264), Radiochemical data of the series (b) and (c) measurements made on zone E of the TECHNO crust. https://doi.org/10.1594/PANGAEA.855050

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