Citation:

A:1012346615426

Name: Composition of sulfides from the Sierra Leone Fracture Zone (Central Atlantic Ocean)
Published: 2001
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

An analysis of data on the location of hydrothermal fields, seismicity, and satellite altimetry evidences that in mid-ocean ridges with low spreading rate hydrothermal fields tend to be grouped in areas with generally low seismic activity and at intersections of discontinuities and rift zones. Based on this assumption, the Sierra Leone Fracture Zone was studied in 2000 during Cruise 22 of R/V Akademik Nikolaj Strakhov. A study of gabbrodolerite and dolerite showed that sulfide ore minerals in them were formed both by hydrothermal and magmatic processes. An analysis of melt inclusions demonstrated that magmatic complexes formed from a high-temperature (1210-1255°C) low-potassium melt of the N-MORB type. Investigations of fluid inclusions revealed that gabbro and dolerite formed under influence of an active hydrothermal system at temperature 205-226°C. Thus, the Sierra Leone Fracture Zone is considered to be perspective for a discovery of a new hydrothermal field.

Project(s):

Archive of Ocean Data (ARCOD)

Coverage:

Latitude: 6.343300 * Longitude: -33.515000

Minimum Elevation: -3450.0 m * Maximum Elevation: -3450.0 m

Event(s):

S2234 * Latitude Start: 6.343300 * Longitude Start: -33.515000 * Latitude End: 6.343300 * Longitude End: -33.515000 * Elevation Start: -3450.0 m * Elevation End: -3450.0 m * Location: Mid-Atlantic Ridge * Campaign: * Basis: Akademik Nikolaj Strakhov * Method/Device: Dredge (DRG)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device
1	Sample code/label	Sample label		Mazarovich, Alexander O
2	Minerals	Minerals		Mazarovich, Alexander O
3	Iron	Fe	%	Mazarovich, Alexander O	CAMEBAX microprobe
4	Copper	Cu	%	Mazarovich, Alexander O	CAMEBAX microprobe
5	Zinc	Zn	%	Mazarovich, Alexander O	CAMEBAX microprobe
6	Nickel	Ni	%	Mazarovich, Alexander O	CAMEBAX microprobe
7	Cobalt	Co	%	Mazarovich, Alexander O	CAMEBAX microprobe
8	Lead	Pb	%	Mazarovich, Alexander O	CAMEBAX microprobe
9	Sulfur, total	TS	%	Mazarovich, Alexander O	CAMEBAX microprobe
10	Sum	Sum	%	Mazarovich, Alexander O	Calculated

License:

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

Size:

160 data points

Data

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

1 Sample label	2 Minerals	3 Fe [%]	4 Cu [%]	5 Zn [%]	6 Ni [%]	7 Co [%]	8 Pb [%]	9 TS [%]	10 Sum [%]
34/22-11	cubanite	40.68	23.64	0.25	0.01	0.05	0.00	34.68	99.31
34/22-12	cubanite	40.73	23.19	0.22	0.00	0.04	0.00	34.22	98.40
34/22-14	cubanite	40.61	23.25	0.32	0.00	0.06	0.34	34.93	99.50
34/22-9	chalcopyrite	30.39	33.97	0.16	0.00	0.05	0.00	34.05	98.62
34/22-10	mixture of cubanite with chalcopyrite	35.40	28.37	0.31	0.21	0.22	0.00	33.94	98.45
34/22-1	chalcopyrite	30.53	33.87	0.12	0.01	0.05	0.00	34.21	98.80
34/22-2	chalcopyrite	30.36	34.04	0.23	0.02	0.06	0.08	34.50	99.28
34/22-5	chalcopyrite	30.61	33.77	0.40	0.02	0.06	0.00	34.42	99.27
34/22-6	pyrrhotite	60.81	0.01	0.00	0.14	0.13	0.00	38.26	99.36
34/22-7	pyrrhotite	61.03	0.08	0.02	0.09	0.12	0.00	38.51	99.85
34/22-8	pyrrhotite	60.58	0.02	0.02	0.01	0.16	0.00	38.62	99.42
34/22-13	pyrrhotite	59.83	0.18	0.13	0.01	0.11	0.00	39.12	99.39
34/37-23	pyrrhotite	59.64	0.55	0.64	0.24	0.16	0.19	38.64	100.05
34/37-24	pyrrhotite	59.92	0.62	0.70	0.26	0.17	0.12	38.41	100.20
34/37-25	pyrrhotite	60.19	0.59	0.69	0.26	0.16	0.11	38.04	100.05
34/37-26	pyrrhotite	60.42	0.61	0.73	0.26	0.15	0.12	38.66	100.95