Citation:

PANGAEA.950415

Name: Chemical composition of carbonate-free fraction of sediments from the East Pacific Rise
Published: 2022-11-09
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

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Published: 2022-11-09 • DOI registered: 2022-12-09

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Abstract:

The expedition "RISEPAC" in 1961 of Scripps Institution of Oceanography crossed the East Pacific Rise at about 12-14°S between 90° and 140 °W, securing heat flow measurements and sediment samples. The sediments are predominantly dark brown clayey sediments at deeper parts of the traverse, gradually becoming lighter brown to almost brownish white on the rise due to increase in carbonate content. On the very crest of the rise where the heat flow reaches a maximum, the sediments are very dark brown with lower carbonate content although well above the compensation depth. To avoid fortuitous results a thick layer from each core was sampled, usually the interval 30-70 cm. Before analysis the samples were dried at 60 °C and ground and further leached with 0.2-molar acetic acid at 50°C for 1 h in order to separate the carbonate free fraction which was then analysed using wet chemistry methods.

Keyword(s):

Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

Related to:

Boström, Kurt; Peterson, Melvin N A (1969): The origin of aluminum-poor ferromanganoan sediments in areas of high heat flow on the East Pacific Rise. Marine Geology, 7(5), 427-447, https://doi.org/10.1016/0025-3227(69)90016-4

Boström, Kurt; Peterson, Melvin N A; Joensuu, Oiva; Fisher, David E (1969): Aluminum-poor ferromanganoan sediments on active oceanic ridges. Journal of Geophysical Research, 74(12), 3261-3270, https://doi.org/10.1029/JB074i012p03261

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: -13.667062 * Median Longitude: -114.935319 * South-bound Latitude: -14.683300 * West-bound Longitude: -139.575000 * North-bound Latitude: -12.500000 * East-bound Longitude: -90.500000

Date/Time Start: 1961-12-05T00:00:00 * Date/Time End: 1961-12-28T00:00:00

Minimum DEPTH, sediment/rock: 0.450 m * Maximum DEPTH, sediment/rock: 0.540 m

Event(s):

RISP-46G * Latitude: -13.716700 * Longitude: -90.500000 * Date/Time: 1961-12-05T00:00:00 * Elevation: -3980.0 m * Recovery: 0.97 m * Location: Pacific Ocean * Campaign: * Basis: Spencer F. Baird * Method/Device: Gravity corer (GC)

RISP-50G * Latitude: -13.600000 * Longitude: -96.700000 * Date/Time: 1961-12-07T00:00:00 * Elevation: -4120.0 m * Recovery: 1.18 m * Location: Pacific Ocean * Campaign: * Basis: Spencer F. Baird * Method/Device: Gravity corer (GC)

RISP-51G * Latitude: -13.533300 * Longitude: -97.800000 * Date/Time: 1961-12-07T00:00:00 * Elevation: -3742.0 m * Recovery: 1.18 m * Location: Pacific Ocean * Campaign: * Basis: Spencer F. Baird * Method/Device: Gravity corer (GC)

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 3, pp. 432-433 of the related publication.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Boström, Kurt
2	Identification	ID		Boström, Kurt
3	DEPTH, sediment/rock	Depth sed	m	Boström, Kurt	Geocode
4	Depth, top/min	Depth top	m	Boström, Kurt
5	Depth, bottom/max	Depth bot	m	Boström, Kurt
6	Aluminium oxide	Al2O3	%	Boström, Kurt
7	Silicon dioxide	SiO2	%	Boström, Kurt
8	Titanium dioxide	TiO2	%	Boström, Kurt
9	Iron	Fe	%	Boström, Kurt
10	Manganese	Mn	%	Boström, Kurt
11	Copper	Cu	mg/kg	Boström, Kurt
12	Zinc	Zn	mg/kg	Boström, Kurt
13	Chromium	Cr	mg/kg	Boström, Kurt
14	Nickel	Ni	mg/kg	Boström, Kurt
15	Cobalt	Co	mg/kg	Boström, Kurt
16	Arsenic	As	mg/kg	Boström, Kurt
17	Molybdenum	Mo	mg/kg	Boström, Kurt
18	Cadmium	Cd	mg/kg	Boström, Kurt
19	Vanadium	V	mg/kg	Boström, Kurt
20	Boron	B	mg/kg	Boström, Kurt
21	Sediment type	Sediment		Boström, Kurt

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

389 data points

Data

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

1 Event	2 ID	3 Depth sed [m]	4 Depth top [m]	5 Depth bot [m]	6 Al2O3 [%]	7 SiO2 [%]	8 TiO2 [%]	9 Fe [%]	10 Mn [%]	11 Cu [mg/kg]	12 Zn [mg/kg]	13 Cr [mg/kg]	14 Ni [mg/kg]	15 Co [mg/kg]	16 As [mg/kg]	17 Mo [mg/kg]	18 Cd [mg/kg]	19 V [mg/kg]	20 B [mg/kg]	21 Sediment
RISP-46G	RISP-52G-1BOS	0.450	0.30	0.60	16.00	38	0.360	5.7	0.6	460	190	47	290	150	11	6	0.6	85	128	Mottled tan and medium brown clay
RISP-50G	RISP-56G-2BOS	0.450	0.30	0.60	10.80	29	0.290	8.7	1.8	910	250	33	640	260	10	12	0.6	108	147	Brown to yellow-brown mud
RISP-51G	RISP-60G-1BOS	0.470	0.34	0.60	8.30	21	0.280	7.9	1.9	770	250	46	790	280	19	23	1.4	93	162	Light brown with some calcareous ooze
RISP-52G	RISP-63G-1BOS	0.500	0.30	0.70	8.70	29	0.250	9.5	3.0									155	155	Chocolate brown mud
RISP-56G	RISP-65G-1BOS	0.465	0.33	0.60	6.70	19	0.220	16.4	5.6	1800	470	20	1200	230	93	340	1.1	415	190	Brown clay
RISP-60G	RISP-66G-1BOS	0.535	0.37	0.70	5.30	12	0.120	5.8	1.2	540	290	58	640	230	23	35	4.7	59	165	Calcareous ooze with lots of foraminifers
RISP-63G	RISP-68G-1BOS	0.500	0.30	0.70	2.50	10	0.050	6.0	1.0	400	350	90	390	150	30		5.0	100	250	Very light calcareous ooze with mostly foraminifers
RISP-65G	RISP-69G-1BOS	0.500	0.30	0.70	1.30	18	0.045	20.0	6.7	710	490	53	470	110	13	9	3.5	490	440	Globigerina ooze
RISP-66G	RISP-71G-1BOS	0.500	0.30	0.70	1.10	11	0.030	16.5	5.1	740	340	23	430	85		17	4.0	370	340	Globigerina ooze
RISP-68G	RISP-72G-1BOS	0.500	0.30	0.70	0.45	13	0.045	21.1	6.8	740	360	66	420	75	140	57	4.5	620	830	Dark brown mud with lighter patches rich in foraminifers
RISP-69G	RISP-73G-1BOS	0.500	0.30	0.70	0.94	13	0.040	22.6	8.8	860	290	46	520	96	400	50	3.8	650	690	Dark brown mud with globerigina
RISP-71G	RISP-74G-1BOS	0.500	0.30	0.70	1.50	11	0.050	22.2	7.9	910	370	49	490	120	180	20	4.4	570	490	Medium brown mud
RISP-72G	RISP-75G-1BOS	0.500	0.30	0.70	1.80	11	0.035	14.7	3.5	700	530	63	390	140	84	28	3.5	280	315	Medium brown mud
RISP-73G	RISP-76G-1BOS	0.500	0.30	0.70	2.10	9	0.040	8.5	1.7	510	340	76	250	130	51	8	2.5	127	210	Light brown mud
RISP-74G	RISP-77G-1BOS	0.540	0.38	0.70	3.20	9	0.045	8.2	1.8	590	230	36	360	230	63	5	2.7	270	225	Dark tan foraminiferal ooze
RISP-75G	RISP-80G-1BOS	0.525	0.35	0.70	8.80	21	0.025	14.0	1.6	1160	390	26	750	260	18	120	2.6	260	207	Light tan to medium brown mud. Lighter to darker from top to bottom
RISP-76G	RISP-81G-1BOS	0.500	0.30	0.70	6.20	15	0.220	8.8	1.5	920	370	29	590	220	44	29	3.7	145	220	Tan mud with lots of foraminifers
RISP-77G	RISP-82G-1BOS	0.485	0.30	0.67	10.80	28	0.290	17.8	4.1	1220	410	18	760	270	170	210	1.8	430	195	Medium to dark brown mud with foraminifera
RISP-80G	RISP-80G-1BOS	0.500	0.30	0.70	10.60	37	0.690	10.0	3.3	1000	270	35	730	240	100	120	0.7	275	106	Dark brown mud
RISP-81G	RISP-81G-1BOS	0.500	0.30	0.70	9.50	34	0.320	10.5	4.8	730	260	18	550	250	85	130	0.7	320	127	Dark brown mud
RISP-82G	RISP-82G-1BOS	0.500	0.30	0.70	12.40	36	1.000	9.7	3.2	760	260	45	690	260	77	93	0.9	205	147	Medium brown mud