Citation:

80911

Name: Composition of Cape Leeuwin Manganese nodule deposit off Western Australia
Published: 1977
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

In 1970 a large deposit of ferromanganese nodules was discovered on the floor of the Indian Ocean southwest of Cape Leeuwin by the research vessel USNS Eltanin. This discovery, which was based largely on bottom photographs from about 20 stations, was discussed by Frakes (1975) and Kennett and Watkins (1975, 1976). The photographs suggest that the deposit spreads, nearly continuously, over 900 000km^2, and cores showed that the nodules are essentially confined to the sediment surface. Kennett and Watkins (op. cit.) pointed to the abundance of ripple and scour marks and current-formed lineations on the present surface, and of extensive disconformities in the cores, as evidence of strong present and past bottom currents in the region. They suggested that the current action had resulted in very low sedimentation rates, which had allowed the nodule field, named by them (1976) the 'Southeast Indian Ocean Manganese Pavement', to develop. In early 1976 the authors used the research vessel HMAS Diamantina for a 10-day cruise in the region to sample the nodules in order to study their chemistry and mineralogy. During the cruise 9 stations were occupied, 8 of them successfully (Figure 1), and about 2000 nodules were recovered from the sea bed. The apparatus used was a light box dredge on the ships hydrowire, which had a breaking strain of about one tonne. Although an attempt was made to reoccupy Eltanin photographic stations, it should be noted that positioning was by celestial navigation, so errors of up to 10 km are possible.

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: -37.297917 * Median Longitude: 104.399999 * South-bound Latitude: -41.883333 * West-bound Longitude: 98.966667 * North-bound Latitude: -34.633333 * East-bound Longitude: 114.166660

Date/Time Start: 1976-01-28T00:00:00 * Date/Time End: 1976-02-04T00:00:00

Minimum Elevation: -5000.0 m * Maximum Elevation: -4300.0 m

Event(s):

DIAM76_NOD-2 * Latitude: -40.050000 * Longitude: 114.166660 * Date/Time: 1976-01-28T00:00:00 * Elevation: -4700.0 m * Location: Indian Ocean * Campaign: * Basis: Diamantina * Method/Device: Dredge (DRG)

DIAM76_NOD-3 * Latitude: -41.883333 * Longitude: 113.950000 * Date/Time: 1976-01-29T00:00:00 * Elevation: -4300.0 m * Location: Indian Ocean * Campaign: * Basis: Diamantina * Method/Device: Dredge (DRG)

DIAM76_NOD-4 * Latitude: -37.950000 * Longitude: 103.150000 * Date/Time: 1976-01-30T00:00:00 * Elevation: -5000.0 m * Location: Indian Ocean * Campaign: * Basis: Diamantina * Method/Device: Dredge (DRG)

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
1	Event label	Event		Frakes, Lawrence A
2	Sample code/label	Sample label		Frakes, Lawrence A
3	Nodules	Nodules		Frakes, Lawrence A
4	Iron	Fe	%	Frakes, Lawrence A
5	Manganese	Mn	%	Frakes, Lawrence A
6	Nickel	Ni	%	Frakes, Lawrence A
7	Copper	Cu	%	Frakes, Lawrence A
8	Cobalt	Co	%	Frakes, Lawrence A

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

56 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Sample label	3 Nodules	4 Fe [%]	5 Mn [%]	6 Ni [%]	7 Cu [%]	8 Co [%]
DIAM76_NOD-2	ADR2	1	5.5	16.2	0.90	0.48	0.05
DIAM76_NOD-3	ADR3	1-3	9.4	20.2	0.79	0.42	0.06
DIAM76_NOD-4	ADR4	1.5-8	10.2	18.2	0.68	0.34	0.11
DIAM76_NOD-5	ADR5	1.5-10	9.2	20.1	0.72	0.41	0.12
DIAM76_NOD-6	ADR6	1.5-8	9.8	18.1	0.63	0.36	0.13
DIAM76_NOD-7	ADR7	1.5-4	10.3	18.5	0.66	0.31	0.15
DIAM76_NOD-8	ADR8	1.5-4	8.7	19.7	0.75	0.41	0.16
DIAM76_NOD-9	ADR9	1.5-4	11.9	16.0	0.44	0.22	0.15