Citation:

PANGAEA.951131

Name: Occurrence of manganese nodules of GH81-4 survey area
Published: 2022-11-21
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

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Abstract:

Local variability of manganese nodule facies and associated sediments were studied around abyssal hills (60 x 60 km²) located in the equatorial zone of the Central Pacific Basin. Small-scale variations in nodule occurrence, mineralogy, chemistry, and internal structure are discussed in relation to seismic records and sediment lithology. The slow sedimentation rate from the late Tertiary to the Quaternary appear to have promoted formation of nodules around the abyssal hills, although the Plio-Pleistocene hiatus at depths below sediment surface suggests no clear evidence of increased growth of nodules during the period. In the area of rapid and continuous sedimentation away from the hill areas, nodules are rare probably because of insufficient lifting force for nodules. Mineralogical and chemical studies reveal that the two principal nodule morphologies (smooth and rough surfaces) result from preferential deposition of hydrogenous or diagenetic manganese minerals in relation to early diagenesis of surface siliceous sediments. Regional variability of nodule-surface morphology and composition suggests a very local change in sedimentary conditions in space, and internal mineral variation suggests changes in sedimentary conditions with time. The geological factors controlling the small-scale variability of nodule facies seem to be similar to those controlling regional-scale variations.

Keyword(s):

Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

Related to:

Nakao, Seizo; Ishihara, Takemi; Usui, Akira; Nishimura, Akira; Tanahashi, Manabu; Yamazaki, Toshitsugu; Saito, Eiji; Handa, Keiji; Yamazaki, Tetsuo; Nakayama, Ken (1986): Outline of the GH81-4 Cruise. in: Marine Geology, Geophysics, and Manganese Nodules around Deep-Sea Hills in the Central Pacific Basin, August-October 1981 (GH81-4 Cruise), Geological Survey of Japan, Cruise Report, 21, 1-15, https://www.gsj.jp/data/cruise-rep/21-01.pdf (21-01.pdf)

Usui, Akira; Nishimura, Akira; Tanahashi, Manabu; Terashima, Shigeru (1987): Local variability of manganese nodule facies on small abyssal hills of the Central Pacific Basin. Marine Geology, 74(3-4), 237-275, https://doi.org/10.1016/0025-3227(87)90053-3

Usui, Akira; Nishimura, Akira; Tanahashi, Manabu; Terashima, Shigeru (2022): Chemistry of manganese nodules of GH81-4 survey area. PANGAEA, https://doi.org/10.1594/PANGAEA.951136

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: 3.124143 * Median Longitude: -169.672030 * South-bound Latitude: 2.756300 * West-bound Longitude: -169.840000 * North-bound Latitude: 3.355300 * East-bound Longitude: -169.513700

Date/Time Start: 1981-08-26T00:00:00 * Date/Time End: 1984-09-24T00:00:00

Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 0.23 m

Event(s):

GH81-4-B59 (Station 2622) * Latitude: 3.273200 * Longitude: -169.687700 * Date/Time: 1981-09-04T00:00:00 * Elevation: -5486.0 m * Recovery: 0.43 m * Location: Pacific Ocean * Campaign: * Basis: * Method/Device: Box corer (BC)

GH81-4-B60 (Station 2628) * Latitude: 3.303800 * Longitude: -169.749000 * Date/Time: 1981-09-04T00:00:00 * Elevation: -5588.0 m * Recovery: 0.24 m * Location: Pacific Ocean * Campaign: * Basis: * Method/Device: Box corer (BC)

GH81-4-B61 (Station 2634) * Latitude: 3.202200 * Longitude: -169.699300 * Date/Time: 1981-09-05T00:00:00 * Elevation: -5461.0 m * Recovery: 0.42 m * Location: Pacific Ocean * Campaign: * Basis: * Method/Device: Box corer (BC)

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 Appendix 1 - Part 1, pp. 260-271 of the related publication.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Usui, Akira
2	Latitude of event	Latitude		Usui, Akira
3	Longitude of event	Longitude		Usui, Akira
4	Elevation of event	Elevation	m	Usui, Akira
5	Identification	ID		Usui, Akira
6	Deposit type	Deposit type		Usui, Akira
7	DEPTH, sediment/rock	Depth sed	m	Usui, Akira	Geocode
8	Nodules, mass abundance	Nodules	kg/m²	Usui, Akira
9	Nodule, areal coverage	Nodules cov	%	Usui, Akira
10	Nodules	Nodules	#	Usui, Akira	size >10cm
11	Nodules	Nodules	#	Usui, Akira	size 10-8cm
12	Nodules	Nodules	#	Usui, Akira	size 8-6cm
13	Nodules	Nodules	#	Usui, Akira	size 6-4cm
14	Nodules	Nodules	#	Usui, Akira	size 4-2cm
15	Nodules	Nodules	#	Usui, Akira	size 2-1cm
16	Nodules	Nodules	#	Usui, Akira	size 0-1cm
17	Nodules	Nodules	#	Usui, Akira	size Med Size [cm]
18	Description	Description		Usui, Akira	shape and surface texture of Mn nodules

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1141 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	6 Deposit type	7 Depth sed [m]	8 Nodules [kg/m²]	9 Nodules cov [%]	10 Nodules [#] (size >10cm)	11 Nodules [#] (size 10-8cm)	12 Nodules [#] (size 8-6cm)	13 Nodules [#] (size 6-4cm)	14 Nodules [#] (size 4-2cm)	15 Nodules [#] (size 2-1cm)	16 Nodules [#] (size 0-1cm)	17 Nodules [#] (size Med Size [cm])	18 Description (shape and surface texture of ...)
GH81-4-FG313	3.3553	-169.7607	-5727	GH81-4-FG313-1	Mn nodule	0.00	0.10	0	0	0	0	0	0	3	2	1.2	Spheroidal Mn nodule with rough surface
GH81-4-FG314	3.3372	-169.6645	-5602	GH81-4-FG314-1	Mn nodule	0.00	0.10	0	0	0	0	0	0	1	5	0.6	Spheroidal Mn nodule with rough surface
GH81-4-FG315	3.3347	-169.5830	-5474	GH81-4-FG315-1	Mn nodule	0.00	0.10	0	0	0	0	0	0	2	2	1.0	Spheroidal Mn nodule with rough surface
GH81-4-FG322-1	3.3410	-169.5137	-5572	GH81-4-FG322-1-1	Mn nodule	0.00	12.80	1	0	0	5	6	21	16	26	1.7	Irregular discoidal to spheroidal Mn nodule with smooth to rough surface
GH81-4-FG322-2	3.3438	-169.5138	-5334	GH81-4-FG322-2-1	Mn nodule	0.00	0.40	15	0	0	0	0	3	0	0	3.0	Irregular discoidal Mn nodule with smooth to rough surface
GH81-4-FG311	3.2658	-169.8400	-5624	GH81-4-FG311-1	Mn nodule	0.00	0.20	0	0	0	0	0	1	0	1	1.0	Discoidal Mn nodule with rough surface
GH81-4-FG312	3.2713	-169.7590	-5666	GH81-4-FG312-1	Mn nodule	0.00	0.80	0	0	0	0	0	5	8	3	1.6	Spheroidal Mn nodule with rough surface
GH81-4-P220-H56	3.2550	-169.6798	-5371	GH81-4-P220-H56-1	Mn nodule	0.23									1	0.5	Spheroidal Mn nodule with rough surface
GH81-4-FG327	3.2518	-169.6655	-5364	GH81-4-FG327-1	Mn nodule	0.00	4.50	0	0	0	0	2	12	26	0	1.8	Spheroidal Mn nodule with rough surface
GH81-4-FG317	3.1653	-169.5843	-5537	GH81-4-FG317-1	Mn nodule	0.00	0.10	0	0	0	0	0	1	0	1	1.0	Spheroidal Mn nodule with rough surface
GH81-4-FG316-1	3.0822	-169.5845	-5564	GH81-4-FG316-1-1	Mn nodule	0.00	0.10	0	0	0	0	0	1	4	1	1.5	Spheroidal to discoidal Mn nodule with rough surface
GH81-4-FG316-2	3.0852	-169.5840	-5526	GH81-4-FG316-2-1	Mn nodule	0.00	2.10	0	0	0	1	2	22	2	1	3.0	Irregular discoidal and polylobate Mn nodule with rough surface
GH81-4-FG342	3.0417	-169.5412	-5287	GH81-4-FG342-1	Mn nodule	0.00	0.40	0	0	0	0	0	0	1	13	0.5	Spheroidal Mn nodule with rough surface
GH81-4-FG341-1	2.9990	-169.6672	-5617	GH81-4-FG341-1-1	Mn nodule	0.00	0.30	0	0	0	0	0	1	12	8	1.2	Spheroidal Mn nodule with rough surface
GH81-4-FG341-2	3.0003	-169.6705	-5609	GH81-4-FG341-2-1	Mn nodule	0.00	0.10	0	0	0	0	0	0	2	0	1.5	Spheroidal Mn nodule with rough surface
GH81-4-FG329	2.9973	-169.5788	-5345	GH81-4-FG329-1	Mn nodule	0.00	0.80	0	0	0	0	0	5	9	0	1.8	Spheroidal Mn nodule with rough surface
GH81-4-FG335	2.8297	-169.6688	-5603	GH81-4-FG335-1	Mn nodule	0.00	12.60	0	1	1	1	2	3	3	3	2.7	Discoidal polylobate to tabular Mn nodule with rough surface
GH81-4-FG334	2.8305	-169.5848	-5469	GH81-4-FG334-1	Mn nodule	0.00	0.30	0	0	0	0	0	1	11	4	1.4	Spheroidal Mn nodule with rough surface
GH81-4-FG338	2.7563	-169.6692	-5410	GH81-4-FG338-1	Mn nodule	0.00	4.90	0	0	0	0	5	3	48	20	1.4	Spheroidal Mn nodule with rough surface
GH81-4-FG343	3.2565	-169.6615	-5319	GH81-4-FG343-1	Mn nodule	0.00	1.30	0	0	0	0	0	5	34	17	1.3	Spheroidal Mn nodule with rough surface
GH81-4-FG344	3.2648	-169.6382	-5378	GH81-4-FG344-1	Mn nodule	0.00	0.10	0	0	0	0	0	0	5	0	1.5	Spheroidal Mn nodule with rough surface
GH81-4-FG345	3.2730	-169.6483	-5437	GH81-4-FG345-1	Mn nodule	0.00	0.10	0	0	0	0	0	0	1	0	1.5	Spheroidal Mn nodule with rough surface
GH81-4-FG350	3.3308	-169.6055	-5536	GH81-4-FG350-1	Mn nodule	0.00	0.10	0	0	0	0	0	0	1	0	1.5	Discoidal Mn nodule with smooth to rough surface
GH81-4-FG351	3.2572	-169.6793	-5356	GH81-4-FG351-1	Mn nodule	0.00	2.80	1	0	0	1	0	9	50	12	1.5	Spheroidal to discoidal Mn nodule with rough surface
GH81-4-FG352	3.2630	-169.6845	-5370	GH81-4-FG352-1	Mn nodule	0.00	9.60	0	0	0	0	6	33	57	13	1.7	Spheroidal to discoidal Mn nodule with rough surface
GH81-4-FG353	3.2687	-169.6900	-5422	GH81-4-FG353-1	Mn nodule	0.00	15.60	30	0	0	3	32	55	1	0	3.6	Polylobate irregular spheroidal to discoidal Mn nodule with smooth surface
GH81-4-B59	3.2732	-169.6877	-5486	GH81-4-B59-1	Mn nodule	0.00	15.70	30	0	0	5	18	83	0	0	3.3	Irregular discoidal and polylobate Mn nodule with smooth surface
GH81-4-FG355	3.2827	-169.7068	-5340	GH81-4-FG355-1	Mn nodule	0.00	5.20	0	0	0	0	4	28	3	4	2.9	Spheroidal to discoidal Mn nodule with rough surface
GH81-4-FG356	3.2892	-169.7172	-5392	GH81-4-FG356-1	Mn nodule	0.00	11.40	2	0	0	0	1	75	33	6	2.5	Spheroidal to discoidal Mn nodule with rough surface
GH81-4-FG357	3.2948	-169.7268	-5456	GH81-4-FG357-1	Mn nodule	0.00	5.90		0	0	0	3	30	43	2	1.9	Spheroidal Mn nodule with rough surface
GH81-4-FG358	3.3012	-169.7377	-5468	GH81-4-FG358-1	Mn nodule	0.00	5.80	1	0	0	0	2	27	31	5	1.9	Spheroidal Mn nodule with rough surface
GH81-4-B60	3.3038	-169.7490	-5588	GH81-4-B60-1	Mn nodule	0.00	8.80	2	0	0	0	2	79	27	0	2.7	Spheroidal Mn nodule with rough surface
GH81-4-B60	3.3038	-169.7490	-5588	GH81-4-B60-1	Mn nodule	0.00	8.80	2	0	0	0	2	79	27	0	2.7	Spheroidal Mn nodule with rough surface
GH81-4-FG360	3.1775	-169.7353	-5555	GH81-4-FG360-1	Mn nodule	0.00	0.30	0	0	0	0	0	2	6	4	1.3	Spheroidal Mn nodule with rough surface
GH81-4-FG361	3.1887	-169.7198	-5632	GH81-4-FG361-1	Mn nodule	0.00	0.20	1	0	0	0	0	1	7	0	1.6	Spheroidal Mn nodule with rough surface
GH81-4-FG362	3.1943	-169.7127	-5628	GH81-4-FG362-1	Mn nodule	0.00	9.90	10	0	0	0	9	74	8	0	3.0	Irregular discoidal and polylobate Mn nodule with smooth surface
GH81-4-FG363	3.1998	-169.7052	-5466	GH81-4-FG363-1	Mn nodule	0.00	15.10	25	0	0	0	17	104	38	4	2.8	Irregular discoidal and polylobate Mn nodule with smooth surface
GH81-4-B61	3.2022	-169.6993	-5461	GH81-4-B61-1	Mn nodule	0.00	14.60	40	0	0	0	11	149	12	0	3.0	Tabular discoidal to irregular polylobate Mn nodule with smooth surface
GH81-4-FG364	3.2213	-169.6937	-5446	GH81-4-FG364-1	Mn nodule	0.00	10.20	15	0	1	3	5	40	29	0	2.5	Irregular discoidal and polylobate Mn nodule with smooth surface
GH81-4-FG365	3.2305	-169.6923	-5350	GH81-4-FG365-1	Mn nodule	0.00	3.00	0	0	0	0	2	10	40	16	1.5	Spheroidal Mn nodule with rough surface
GH81-4-FG366	3.2387	-169.6893	-5356	GH81-4-FG366-1	Mn nodule	0.00	0.60	0	0	0	0	0	4	14	0	1.6	Spheroidal Mn nodule with rough surface
GH81-4-FG367	3.2488	-169.6878	-5326	GH81-4-FG367-1	Mn nodule	0.00	1.30	0	0	0	0	0	11	31	0	1.7	Spheroidal Mn nodule with rough surface
GH81-4-FG368	3.2735	-169.6765	-5374	GH81-4-FG368-1	Mn nodule	0.00	14.80	15	1	1	4	20	29	0	0	3.9	Discoidal polylobate Mn nodule with smooth surface
GH81-4-FG369	3.2850	-169.6788	-5482	GH81-4-FG369-1	Mn nodule	0.00	1.70	0	0	0	0	0	9	27	12	1.4	Spheroidal Mn nodule with rough surface
GH81-4-FG370	3.2968	-169.6815	-5486	GH81-4-FG370-1	Mn nodule	0.00	0.20	0	0	0	0	0	3	5	1	1.7	Spheroidal Mn nodule with rough surface
GH81-4-FG372	3.3260	-169.6870	-5529	GH81-4-FG372-1	Mn nodule	0.00	0.10	0	0	0	0	0	0	4	5	0.9	Spheroidal Mn nodule with rough surface
GH81-4-FG373	3.2662	-169.7397	-5686	GH81-4-FG373-1	Mn nodule	0.00	4.90	2	0	0	0	8	25	7	6	2.8	Irregular discoidal and polylobate Mn nodule with rough surface
GH81-4-FG374	3.2637	-169.7258	-5391	GH81-4-FG374-1	Mn nodule	0.00	0.05										Mn nodule with rough surface
GH81-4-FG375	3.2623	-169.7092	-5363	GH81-4-FG375-1	Mn nodule	0.00	10.20	5	0	0	0	4	50	39	4	2.2	Spheroidal to discoidal Mn nodule with rough surface
GH81-4-FG376	3.2638	-169.6970	-5333	GH81-4-FG376-1	Mn nodule	0.00	10.40	15	0	0	1	5	44	9	4	2.8	Spheroidal to discoidal Mn nodule with rough surface
GH81-4-FG377	3.2635	-169.6883	-5331	GH81-4-FG377-1	Mn nodule	0.00	8.10	10	0	0	4	3	23	1	0	3.3	Irregular discoidal to spheroidal Mn nodule with smooth to rough surface
GH81-4-P224-H60	3.2773	-169.6845	-5500	GH81-4-P224-H60-1	Mn nodule	0.00			0	0	0	0	1	0	0	3.0	Spheroidal Mn nodule with smooth to rough surface
GH81-4-FG378	3.2037	-169.7245	-5495	GH81-4-FG378-1	Mn nodule	0.00	9.50	30	0	0	0	0	68	75	7	2.0	Irregular discoidal and polylobate Mn nodule with smooth surface
GH81-4-FG379	3.2112	-169.7152	-5061	GH81-4-FG379-1	Mn nodule	0.00	4.00	2	0	0	1	2	27	34	0	1.9	Irregular discoidal Mn nodule with smooth surface
GH81-4-FG380	3.2188	-169.7060	-5318	GH81-4-FG380-1	Mn nodule	0.00	15.10	10	0	0	0	26	77	5	0	3.3	Irregular discoidal and polylobate Mn nodule with smooth surface
GH81-4-FG381	3.2257	-169.6982	-5341	GH81-4-FG381-1	Mn nodule	0.00	18.00	10	0	0	0	11	90	9	0	3.0	Spheroidal to discoidal Mn nodule with smooth to rough surface
GH81-4-FG382	3.2342	-169.6883	-5339	GH81-4-FG382-1	Mn nodule	0.00	0.50	0	0	0	0	0	2	7	6	1.2	Spheroidal Mn nodule with rough surface
GH81-4-B64	3.2432	-169.6935	-5368	GH81-4-B64-1	Mn nodule	0.00	1.10	0	0	0	1	0	4	5	1	1.9	Spheroidal Mn nodule with rough surface
GH81-4-FG384	3.2015	-169.6825	-5256	GH81-4-FG384-1	Mn nodule	0.00	8.90	20	0	0	5	9	18	1	0	3.7	Irergular discoidal to tabular Mn nodule with smooth surface
GH81-4-FG385	3.2113	-169.6828	-5192	GH81-4-FG385-1	Mn nodule	0.00	13.00	10	0	3	3	7	25	7	0	3.2	Irregular discoidal to spheroidal Mn nodule with smooth to rough surface
GH81-4-FG386	3.2208	-169.6832	-5361	GH81-4-FG386-1	Mn nodule	0.00	10.50		0	0	0	3	55	25	4	2.5	Spheroidal to discoidal Mn nodule with smooth to rough surface
GH81-4-FG387	3.2310	-169.6837	-5336	GH81-4-FG387-1	Mn nodule	0.00	0.80		0	0	0	0	6	17	6	1.5	Spheroidal Mn nodule with rough surface
GH81-4-P225-H61	3.2220	-169.6942	-5427	GH81-4-P225-H61-1	Mn nodule	0.00			0	0	0	0	1	0	0	3.0	Discoidal Mn nodule with rough surface
GH81-4-FG390	3.2065	-169.6598	-5410	GH81-4-FG390-1	Mn nodule	0.00	0.05	0	0	0	0	0	1	1	0	2.0	Discoidal Mn nodule with rough surface
GH81-4-FG391	3.2162	-169.6678	-5371	GH81-4-FG391-1	Mn nodule	0.00	0.30	0	0	0	0	0	1	3	2	1.3	Spheroidal Mn nodule with rough surface
GH81-4-FG392	3.2265	-169.6770	-5341	GH81-4-FG392-1	Mn nodule	0.00	0.90	0	0	0	0	0	3	22	7	1.4	Spheroidal Mn nodule with rough surface
GH81-4-B65	3.2357	-169.6810	-5368	GH81-4-B65-1	Mn nodule	0.00	0.40		0	0	0	0	0	20	100	0.6	Spheroidal Mn nodule with rough surface
GH81-4-FG424	3.2395	-169.6608	-5506	GH81-4-FG424-1	Mn nodule	0.00	3.30		0	0	1	1	9	16	7	1.6	Spheroidal Mn nodule with rough surface
GH81-4-FG425	3.2395	-169.6480	-5544	GH81-4-FG425-1	Mn nodule	0.00	0.05		0	0	0	0	0	2	3	0.8	Discoidal Mn nodule with rough surface
GH81-4-FG426	3.2355	-169.6353	-5557	GH81-4-FG426-1	Mn nodule	0.00	0.05		0	0	0	0	0	0	2	0.5	Fragmented Mn nodule with rough surface
GH81-4-FG394	2.7595	-169.6505	-5329	GH81-4-FG394-1	Mn nodule	0.00	0.40		0	0	0	0	1	14	7	1.3	Spheroidal Mn nodule with rough surface
GH81-4-FG395	2.7682	-169.6502	-5335	GH81-4-FG395-1	Mn nodule	0.00	0.10		0	0	0	0	0	6	2	1.3	Spheroidal Mn nodule with rough surface
GH81-4-FG396	2.7785	-169.6488	-5333	GH81-4-FG396-1	Mn nodule	0.00	0.10		0	0	0	0	0	1	2	0.8	Spheroidal Mn nodule with rough surface
GH81-4-FG397	2.7898	-169.6488	-5339	GH81-4-FG397-1	Mn nodule	0.00	0.10		0	0	0	0	0	2	0	1.5	Spheroidal Mn nodule with rough surface
GH81-4-B66	2.8035	-169.6488	-5360	GH81-4-B66-1	Mn nodule	0.00	0.10		0	0	0	0	0	3	8	0.7	Spheroidal Mn nodule with rough surface
GH81-4-FG400	2.8327	-169.6738	-5645	GH81-4-FG400-1	Mn nodule	0.00	0.05		0	0	0	0	0	0	6	0.5	Spheroidal Mn nodule with rough surface
GH81-4-FG402	2.8337	-169.6700	-5611	GH81-4-FG402-1	Mn nodule	0.00	8.60		0	0	4	10	3	1	0	5.0	Discoidal to ellipsoidal Mn nodule with rough surface
GH81-4-FG403	2.8340	-169.6682	-5590	GH81-4-FG403-1	Mn nodule	0.00	15.10	1	1	2	4	7	0	1	0	5.9	Irregular discoidal Mn nodule with rough surface
GH81-4-FG405	2.7937	-169.6782	-5659	GH81-4-FG405-1	Mn nodule	0.00	0.05		0	0	0	0	1	2	0	1.8	Spheroidal Mn nodule with rough surface
GH81-4-FG407	2.7940	-169.6722	-5545	GH81-4-FG407-1	Mn nodule	0.00	7.60	5	0	0	0	8	40	1	0	3.2	Fragmented irregular discoidal Mn nodule with smooth to rough surface
GH81-4-FG408	2.7942	-169.6672	-5470	GH81-4-FG408-1	Mn nodule	0.00	5.70		0	1	2	0	2	11	0	1.7	Spheroidal to ellipsoidal Mn nodule with rough surface
GH81-4-B67	2.7882	-169.6713	-5620	GH81-4-B67-1	Mn nodule	0.00	3.30	2	0	0	0	5	24	0	0	3.2	Fragmented irregular discoidal Mn nodule with rough surface
GH81-4-FG410	2.8108	-169.6463	-5358	GH81-4-FG410-1	Mn nodule	0.00	0.10		0	0	0	0	0	1	2	0.8	Spheroidal Mn nodule with rough surface
GH81-4-FG412	2.8453	-169.6452	-5396	GH81-4-FG412-1	Mn nodule	0.00	0.05		0	0	0	0	0	1	0	1.5	Discoidal Mn nodule with rough surface
GH81-4-FG413	2.8573	-169.6447	-5425	GH81-4-FG413-1	Mn nodule	0.00	0.05		0	0	0	0	0	2	2	1.0	Discoidal Mn nodule with rough surface
GH81-4-B68	2.8485	-169.5948	-5514	GH81-4-B68-1	Mn nodule	0.00	0.05		0	0	0	0	0	0	2	0.5	Spheroidal Mn nodule with rough surface
GH81-4-FG418	2.7597	-169.6848	-5596	GH81-4-FG418-1	Mn nodule	0.00	0.10		0	0	0	0	0	5	1	1.4	Spheroidal Mn nodule with rough surface
GH81-4-FG422	2.7752	-169.6733	-5528	GH81-4-FG422-1	Mn nodule	0.00	0.20		0	0	0	0	4	1	1	2.5	Irregular discoidal Mn nodule with rough surface
GH81-4-FG423	2.7788	-169.6708	-5512	GH81-4-FG423-1	Mn nodule	0.00	9.60	7	0	0	2	16	39	1	0	3.4	Irregular discoidal and polylobate Mn nodule with smooth to rough surface
GH81-4-P229-H65	2.7725	-169.6753	-5646	GH81-4-P229-H65-1	Mn nodule	0.00			0	0	0	0	2	0	0	3.0	Irregular discoidal and polylobate Mn nodule with rough surface
GH81-4-D496	3.2498	-169.6682	-5365	GH81-4-D496-1	Mn nodule	0.00											Spheroidal to discoidal Mn nodules with smooth to rough surface
GH81-4-FG364	3.2213	-169.6937	-5446	GH81-4-FG364-1	Mn nodule	0.00	10.20	15	0	1	3	5	40	29	0	2.5	Irregular discoidal and polylobate Mn nodule with rough surface