Citation:

PANGAEA.962214

Name: Annotated record of the detailed examination of Mn deposits from L9-84-CP (R/V S.P. Lee) expedition stations
Published: 2023-09-13
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

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Abstract:

Eighteen stations were occupied; 13 dredge hauls were collected on seamount, atoll, and island flanks and three box cores were taken from the sediment cap of an unnamed seamount in the north Marshall Islands. Every dredge haul recovered ferromanganese-oxide crusts, agreeing with the inferences of Halbach and Feller (1980) that crusts form on every hard substrate where currents or other factors preclude significant sedimentation. These samples can be viewed and studied at the U.S. Geological Survey offices in Menlo Park, California.

Keyword(s):

Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

Related to:

Ling, T H; Commeau, J A (2023): PORTASPEC shipboard determined chemical composition of ferromanganese crusts for L9-84-CP expedition (R/V S.P. Lee). PANGAEA, https://doi.org/10.1594/PANGAEA.962227

Manheim, Frank T; Lane-Bostwick, C M (1989): Chemical composition of ferromanganese crusts in the world ocean: A review and comprehensive database. U.S. Geological Survey, 89–020, https://doi.org/10.3133/ofr8920V.1.1

Schwab, W C; Davis, Alicé S; Haggerty, Janet A; Ling, T H; Commeau, J A (1984): Geologic reconnaissance and geochemical analysis of ferromanganese crusts of the Ratak Chain, Marshall Islands. U.S. Geological Survey, 6 pp, https://doi.org/10.3133/ofr8518

Schwab, W C; Davis, Alicé S; Haggerty, Janet A; Ling, T H; Commeau, J A (2023): Average chemical composition of ferromanganese crusts from L9-84-CP (R/V S.P. Lee) expedition stations. PANGAEA, https://doi.org/10.1594/PANGAEA.962226

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: 10.864444 * Median Longitude: 169.483222 * South-bound Latitude: 7.245000 * West-bound Longitude: 167.633000 * North-bound Latitude: 13.904000 * East-bound Longitude: 171.012000

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

Event(s):

L984CP-D1 (Majuro Atoll (S0.001)) * Latitude: 7.245000 * Longitude: 171.012000 * Elevation: -2240.0 m * Recovery: 10 kg * Location: Pacific Ocean * Campaign: * Basis: Samuel P. Lee * Method/Device: Dredge, chain bag (DRG_C)

L984CP-D4 (S0.004) * Latitude: 8.747000 * Longitude: 169.738000 * Elevation: -3550.0 m * Recovery: 4 kg * Location: Pacific Ocean * Campaign: * Basis: Samuel P. Lee * Method/Device: Dredge, chain bag (DRG_C)

L984CP-D6 (5.006) * Latitude: 8.768000 * Longitude: 169.754000 * Elevation: -2900.0 m * Recovery: 150 kg * Location: Pacific Ocean * Campaign: * Basis: Samuel P. Lee * Method/Device: Dredge, rock (DRG_R)

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 1 - pp. 3 of Schwab, WC et al. (1984) and Appendix A - pp. 1-61 of Manheim, FT & Lane-Bostwick, CM (1989).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Schwab, W C
2	Latitude of event	Latitude		Schwab, W C
3	Longitude of event	Longitude		Schwab, W C
4	Elevation of event	Elevation	m	Schwab, W C
5	Identification	ID		Schwab, W C	Observation identification code
6	DEPTH, sediment/rock	Depth sed	m	Schwab, W C	Geocode
7	Position	Position		Schwab, W C
8	Deposit type	Deposit type		Schwab, W C
9	Quantity of deposit	Quantity		Schwab, W C
10	Size	Size		Schwab, W C
11	Substrate type	Substrate		Schwab, W C
12	Sediment type	Sediment		Schwab, W C
13	Comment	Comment		Schwab, W C	Comment on geological context
14	Description	Description		Schwab, W C

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

75 data points

Data

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

1 Event	2 Latitude	3 Longitude	4 Elevation [m]	5 ID	7 Position	8 Deposit type	9 Quantity	10 Size	11 Substrate	12 Sediment	13 Comment	14 Description
L984CP-D1	7.2450	171.0120	-2240	L984CP-D1-1	Surface	Mn crust	Several	0.1-0.2 cm thick	Breccia; basalt,phosphorite	Hardground	Dominantly pillow breccia. Angular red-brown clasts in a pale-brown phosphatized limestone matrix	0 to 0.2 cm thick Mn crusts (average <0.1 cm). Smooth to granular with porous surfaces
L984CP-D4	8.7470	169.7380	-3550	L984CP-D4-1	Surface	Mn crust	Several	0.1-0.6 cm thick	Breccia; basalt,limestone,phosphorite	Hardground	Volcanic breccia of angular to well rounded clasts in pale brown phosphatized limestone	Three rocks have thin crusts (0.1 cm) and are smooth-abraded. Two Mn crusts (variable thickness 0.1 to 0.6 cm) are botryoidal
L984CP-D6	8.7680	169.7540	-2900	L984CP-D6-1	Surface	Mn crust	Several	0.1-5.7 cm thick	Breccia; basalt,limestone,phosphorite	Hardground	About 70% Volcanic breccia with various amounts of basalt clasts in either phosphatized limestone or altered tuffaceous matrix	Two distinct crust groups. 30% of rocks with crusts 0 to 0.1 cm thick with smooth surface. 70% of rocks with crusts 1.0 to 4.0 cm thick (average 3.0 cm) with botryoidal or granular and porous surfaces. One fluted and polished crust and some crusts without substrate
L984CP-D12	11.0180	170.1720	-1788	L984CP-D12-1	Surface	Mn crust	Several	2.0-3.0 cm thick		Hardground		One botryoidal Mn crust (2.0-3.0 cm thick) with an outer porous layer and inner massive layer
L984CP-D13	11.0080	170.2010	-2000	L984CP-D13-1	Surface	Mn crust	Several	0.1-2.5 cm thick		Hardground		Four pieces of Mn crusts with mostly smooth to small-scale botryoidal surfaces (0.1-2.5 cm thick)
L984CP-D14	11.0090	170.2080	-1800	L984CP-D14-1	Surface	Mn crust	Several	0.5-2.5 cm thick		Hardground		Three crusts (0.5-2.5 cm thick). One has botryoidal-porous surface. One has smooth and porous surface and the third is granular and porous
L984CP-D15	12.1810	168.9830	-1550	L984CP-D15-1	Surface	Mn crust	Several	0.7-6.0 cm thick	Breccia; basalt,limestone,phosphorite	Ooze	Nannofossil foraminiferal ooze. Volcanic breccia with various amounts of basalt clasts in a phosphatized limestone matrix. Bedded clastic limestone phosphatized to various degrees. Basalt pebbles	Mn crusts are predominantly botryoidal or granular and porous (0.7-6.0 cm thick)
L984CP-D17	13.9040	167.6330	-1600	L984CP-D17-1	Surface	Mn crust	Several	0.5-3.5 cm thick	Rock; chalk and Breccia; volcanics	Hardground	Soft white limestone (chalk) with Mn dendrites as well as volcanic breccia	Botryoidal and porous Mn crust (0.5-3.5 cm thick)
L984CP-D18	13.9000	167.6480	-1600	L984CP-D18-1	Surface	Mn crust	Several	0.15-10.0 cm thick	Breccia; basalt,limestone,phosphorite and Rock; basalt	Hardground	40% volcanic breccia in phosphatized limestone matrix and 30% dark gray aphyric basalt with phosphatized chalk layer. Basalt and limestone pebbles	Botryoidal and porous Mn crusts with some abraded smooth areas (0.15-10.0 cm thick)