Composition of sulfides from the Sierra Leone Fracture Zone (Central Atlantic Ocean)

DOI

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.

Supplement to: 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): 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

Identifier
DOI https://doi.org/10.1594/PANGAEA.784677
Related Identifier https://doi.org/10.1023/A:1012346615426
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.784677
Provenance
Creator 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
Publisher PANGAEA
Publication Year 2001
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 160 data points
Discipline Earth System Research
Spatial Coverage (-33.515 LON, 6.343 LAT); Mid-Atlantic Ridge