Citation:

PANGAEA.948458

Name: Chemical composition of selected manganese nodule and ferromanganese crust structure zones and morphology types (Expedition NZOI-Tangaroa_22 and MANGANESE 76, R/V Tangaroa)
Creator: Maurice A Meylan
Published: 2022-09-16
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

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Published: 2022-09-16 • DOI registered: 2022-11-09

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Abstract:

If nodules were chemically homogeneous objects, their bulk compositions would paint a complete picture. But they are not, as can be assumed simply from visual recognition of their diverse structural elements. Successively finer sampling of individual nodules reveals an increasingly greater degree of inhomogeneity, the details of which are resolvable down to microprobe scale. For this study, the chemistry of the largest distinctly separable structural elements has been examined, in order to learn how much more information can be gained from such an approach than from whole-nodule analyses. Compositional data for selected nodule structure zones are presented in Appendix N. Concentrations were determined by atomic absorption spectrophotometry. The analysed part of the Mn nodule outer manganese rich rind or the outer part of the ferromanganese crust were dried at 110°C for about 48 hours, and ground to a fine powder.

Keyword(s):

Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

Related to:

Meylan, Maurice A (1978): Marine sedimentation and manganese nodule formation in the Southwestern Pacific Ocean [dissertation]. University of Hawaii, Hawaii, USA, Meylan_Thesis_1978_uhm_phd_7820431_r.pdf

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:

Median Latitude: -24.694999 * Median Longitude: -163.031583 * South-bound Latitude: -39.868330 * West-bound Longitude: -166.900000 * North-bound Latitude: -15.140000 * East-bound Longitude: -159.933330

Date/Time Start: 1974-05-12T00:00:00 * Date/Time End: 1976-06-06T00:00:00

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

Event(s):

TANG22-G989 * Latitude: -25.695000 * Longitude: -165.036670 * Date/Time: 1974-05-12T00:00:00 * Elevation: -5565.0 m * Location: South Pacific Ocean * Campaign: * Basis: * Method/Device: Dredge (DRG) * Comment: Institute: NIWA

TANG22-G992A * Latitude: -24.355000 * Longitude: -163.683330 * Date/Time: 1974-05-13T00:00:00 * Elevation: -5440.0 m * Location: South Pacific Ocean * Campaign: * Basis: * Method/Device: Dredge (DRG) * Comment: Institute: NIWA

TANG22-G993E * Latitude: -23.535000 * Longitude: -162.901670 * Date/Time: 1974-05-14T00:00:00 * Elevation: -4993.0 m * Location: South Pacific Ocean * Campaign: * Basis: * Method/Device: Grab (GRAB) * Comment: Institute: NIWA

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 version of Appendix N - pp. 308 of the related publication.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Meylan, Maurice A
2	Latitude of event	Latitude		Meylan, Maurice A
3	Longitude of event	Longitude		Meylan, Maurice A
4	Elevation of event	Elevation	m	Meylan, Maurice A
5	Identification	ID		Meylan, Maurice A
6	DEPTH, sediment/rock	Depth sed	m	Meylan, Maurice A		Geocode
7	Manganese	Mn	%	Meylan, Maurice A	Atomic absorption spectrophotometry
8	Iron	Fe	%	Meylan, Maurice A	X-ray fluorescence (XRF)
9	Nickel	Ni	mg/kg	Meylan, Maurice A	Atomic absorption spectrophotometry
10	Copper	Cu	mg/kg	Meylan, Maurice A	Atomic absorption spectrophotometry
11	Cobalt	Co	mg/kg	Meylan, Maurice A	Atomic absorption spectrophotometry
12	Deposit type	Deposit type		Meylan, Maurice A
13	Sample type	Samp type		Meylan, Maurice A		part analysed