Mazarovich, Alexander O; Simonov, Vladimir A; Peive, Aleksandr V; Kovyazin, S V; Tret'yakov, G A; Raznitsin, Yury N; Savel'eva, G N; Skolotnev, Sergey G; Sokolov, S Yu; Turko, Natalia N (2001): Composition of sulfides from the Sierra Leone Fracture Zone (Central Atlantic Ocean) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.784677, Supplement to: Mazarovich, AO et al. (2001): Hydrothermal mineralization in the Sierra Leone Fracture Zone (Central Atlantic Ocean). Translated from Litologiya i Poleznye Iskopaemye, 2001, 5, 526-533, Lithology and Mineral Resources, 36(5), 460-466, https://doi.org/10.1023/A:1012346615426
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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: ANS22 * Basis: Akademik Nikolaj Strakhov * Method/Device: Dredge (DRG)
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
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
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 |