Citation:

PANGAEA.949950

Name: Radiochemical data for sediments of cores CH71-08 and CH71-09, HARMATTAN campaign of the R/V Jean Charcot on the Romanche trench area (Atlantic ocean)
Creator: Philippe Bonté
Published: 2022-10-27
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Abstract:

Radiochemical analyses have been performed on 500 mg of each carbonate rich sediment sample (i.d., carbonaceous clay or mud) and 2 g for carbonate devoid samples (i.d., pelagic clay or mud). In the last case the CaCO3 part has been separated using hydrofluoric acid. After processing the samples have been dissecated at 110 Celsius and prepared as an aliquot from which a part is used for radiometric measurements using Alpha spectrometry and the other part is used for uranium-238 and thorium-232 using co-solvant precipitation.

Keyword(s):

Geochemistry; manganese micronodule; manganese nodule; ocean; sediment

Related to:

Bonté, Philippe (1981): Relations entre l'environnement et les caractéristiques des concrétions polymétalliques marines dans la fosse de la Romanche [dissertation]. Université Paris XI Orsay, Orsay, France, 243 pp, 13677600.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: 0.103317 * Median Longitude: -18.608300 * South-bound Latitude: -0.026667 * West-bound Longitude: -18.616600 * North-bound Latitude: 0.233300 * East-bound Longitude: -18.600000

Date/Time Start: 1971-05-01T00:00:00 * Date/Time End: 1971-05-01T00:00:00

Minimum DEPTH, sediment/rock: 0.0000 m * Maximum DEPTH, sediment/rock: 7.6500 m

Event(s):

HRM-CH71-08 * Latitude: 0.233300 * Longitude: -18.616600 * Date/Time: 1971-05-01T00:00:00 * Elevation: -7500.0 m * Recovery: 7.65 m * Location: Equatorial Atlantic * Campaign: * Basis: Jean Charcot * Method/Device: Piston corer (PC)

HRM-CH71-09 * Latitude: -0.026667 * Longitude: -18.600000 * Date/Time: 1971-05-01T00:00:00 * Elevation: -3650.0 m * Recovery: 3.6 m * Location: Atlantic Ocean * Campaign: * Basis: Jean Charcot * Method/Device: Piston corer (PC)

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 8 and Annex V-1, page 60 and 194 of the related publication.

It is worth noting that in this table the author has ratioed isotope concentrations (ex: 230TH/232Th) while measuring each of them using inherently different methods (ex: 230Th using Alpha spectrometry and 232Th using Wet chemistry determination). Thus these terms have been labeled as plain "ratio" rather than "activity ratio".

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Bonté, Philippe
2	Latitude of event	Latitude		Bonté, Philippe
3	Longitude of event	Longitude		Bonté, Philippe
4	Elevation of event	Elevation	m	Bonté, Philippe
5	Sample ID	Sample ID		Bonté, Philippe
6	Sediment type	Sediment		Bonté, Philippe
7	Age, comment	Comm		Bonté, Philippe
8	DEPTH, sediment/rock	Depth sed	m	Bonté, Philippe		Geocode
9	Uranium-238	238U	mg/kg	Bonté, Philippe	Wet chemistry
10	Uranium-238, standard deviation	238U std dev	±	Bonté, Philippe	Wet chemistry
11	Thorium-232	232Th	mg/kg	Bonté, Philippe	Wet chemistry
12	Thorium-232, standard deviation	232Th std dev	±	Bonté, Philippe	Wet chemistry
13	Uranium-238/Thorium-232 ratio	238U/232Th		Bonté, Philippe
14	Uranium-238/Thorium-232 ratio, standard deviation	238U/232Th std dev	±	Bonté, Philippe
15	Uranium-234	234U	dpm/g	Bonté, Philippe	Alpha spectrometry
16	Uranium-234, standard deviation	234U std dev	±	Bonté, Philippe	Alpha spectrometry
17	Uranium-234/Uranium-238 ratio	234U/238U		Bonté, Philippe
18	Uranium-234/Uranium-238 ratio, standard deviation	234U/238U std dev	±	Bonté, Philippe
19	Thorium-230	230Th	dpm/g	Bonté, Philippe	Alpha spectrometry
20	Thorium-230, standard deviation	230Th std dev	±	Bonté, Philippe	Alpha spectrometry
21	Thorium-230/Thorium-232 ratio	230Th/232Th		Bonté, Philippe
22	Thorium-230/Thorium-232, standard deviation	230Th/232Th std dev	±	Bonté, Philippe
23	Thorium-230 excess	230Th xs	dpm/g	Bonté, Philippe	Alpha spectrometry
24	Thorium-230 excess, standard deviation	230Th xs std dev	±	Bonté, Philippe	Alpha spectrometry
25	Calcium carbonate, mass	CaCO3	mg	Bonté, Philippe	Wet chemistry	Amount separated from sediment

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

354 data points

Data

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

1 Event	2 Latitude	3 Longitude	4 Elevation [m]	5 Sample ID	6 Sediment	7 Comm	8 Depth sed [m]	9 238U [mg/kg]	10 238U std dev [±]	11 232Th [mg/kg]	12 232Th std dev [±]	13 238U/232Th	14 238U/232Th std dev [±]	15 234U [dpm/g]	16 234U std dev [±]	17 234U/238U	18 234U/238U std dev [±]	19 230Th [dpm/g]	20 230Th std dev [±]	21 230Th/232Th	22 230Th/232Th std dev [±]	23 230Th xs [dpm/g]	24 230Th xs std dev [±]	25 CaCO3 [mg]
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-1-uth1	Carbonaceous mud	Pleistocene	0.0125			13.10	1.50							11.80	1.00	3.77	0.25
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-1-uth2	Carbonaceous mud	Pleistocene	0.1050	2.05	0.10	7.75	0.78	0.26	0.04	1.64	0.08	1.08	0.06	6.77	0.55	3.67	0.20	5.13	0.28
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-1-uth3a	Carbonaceous mud	Pleistocene	0.2200	1.07	0.08	5.80	0.50	0.18	0.03	0.70	0.06	0.89	0.09	4.10	0.29	2.99	0.20	3.40	0.35	54
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-1-uth3b	Pelagic clay		0.2200	2.30	0.20	12.60	1.10			1.50	0.10			8.90	0.60			7.40	0.80	0
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-2-uth1	Pelagic clay		0.2800	1.17	0.07	8.80	0.80	0.13	0.02	0.73	0.05	0.90	0.07	0.82	0.08	0.46	0.05	0.09	0.13	3
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-2-uth2	Pelagic clay		0.5300	1.81	0.09	17.50	1.20	0.10	0.01	1.09	0.06	0.84	0.05	1.30	0.12	0.38	0.03	0.21	0.18	3
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-2-uth3a	Carbonaceous clay		0.9700	1.96	0.14	11.10	0.90	0.18	0.03	1.09	0.10	0.92	0.06	2.09	0.21	0.86	0.07	1.00	0.31	34
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-2-uth3b	Pelagic clay		0.9700	3.00	0.20	16.80	1.40			1.60	0.20			3.20	0.30			1.50	0.60	0
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-2-uth4a	Carbonaceous clay		1.2200	1.24	0.07	4.86	0.39	0.26	0.03	0.71	0.05	0.78	0.08	1.10	0.09	0.95	0.09	0.39	0.14	38
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-2-uth4b	Pelagic clay		1.2200	2.00	0.10	7.80	0.60			1.10	0.80			1.80	0.20			0.60	0.30	0
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-x-utha	Carbonaceous clay	Miocene	1.4500	0.51	0.06	3.60	0.01	0.14	0.02	0.49	0.05	1.30	0.55	0.01	0.66	0.08	0.06	0.09		56
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-x-uthb	Pelagic clay		1.4500	1.20	0.10	8.20	0.10			1.10	0.01		1.20	0.10						0
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-4-uth1a	Carbonaceous mud	Upper Oligocene	2.6000	0.52	0.06	2.48	0.20	0.21	0.04	0.33	0.04	0.88	0.15	0.36	0.04	0.61	0.10	0.03	0.08	72
HRM-CH71-09	-0.0267	-18.6000	-3650	HRM-CH71-09-4-uth1b	Pelagic mud		2.6000	1.90	0.20	8.90	0.70			1.20	0.10			1.30	0.10					0
HRM-CH71-08	0.2333	-18.6166	-7500	HRM-CH71-08-1-utha	Pelagic mud		0.0000	1.97	0.21	14.30	2.00	0.14		1.70	0.16			32.90	3.30			31.20		0
HRM-CH71-08	0.2333	-18.6166	-7500	HRM-CH71-08-1-uthb	Pelagic mud		0.2000	2.03	0.19	11.10	1.80	0.18		1.71	0.15			33.60	3.70			31.90		0
HRM-CH71-08	0.2333	-18.6166	-7500	HRM-CH71-08-1-uthc	Pelagic mud		0.7000	2.08	0.15	9.70	1.40	0.21		1.68	0.12			32.50	3.10			30.90		0
HRM-CH71-08	0.2333	-18.6166	-7500	HRM-CH71-08-1-uthd	Pelagic mud		1.7800	1.43	0.18	10.10	1.90	0.14		1.16	0.14			34.50	4.40			33.10		0
HRM-CH71-08	0.2333	-18.6166	-7500	HRM-CH71-08-1-uthe	Pelagic mud		2.2800	1.36	0.15	12.00	2.50	0.11		1.04	0.11			34.70	4.80			33.60		0
HRM-CH71-08	0.2333	-18.6166	-7500	HRM-CH71-08-1-uthf	Pelagic mud		3.0500	1.53		9.30	1.44	0.16		0.87				29.70	2.80			28.80		0
HRM-CH71-08	0.2333	-18.6166	-7500	HRM-CH71-08-1-uthg	Pelagic mud		4.0000	1.34	0.14	8.00	1.20	0.17		0.80	0.09			18.90	2.50			18.10		0
HRM-CH71-08	0.2333	-18.6166	-7500	HRM-CH71-08-2-uth1	Carbonaceous mud	Pliocene	5.6300	0.84	0.07	6.10	1.70	0.14		0.53	0.05			7.67	1.40			7.14		31
HRM-CH71-08	0.2333	-18.6166	-7500	HRM-CH71-08-3-uth1	Pelagic mud		6.2300	1.88	0.09	12.30	0.80	0.15		1.54	0.08			17.05	0.70			15.50		0
HRM-CH71-08	0.2333	-18.6166	-7500	HRM-CH71-08-4-uth1	Carbonaceous mud	Miocene	7.6500	0.59	0.09	4.50	1.10	0.13		0.39	0.16			3.39	0.60			3.00		76