Chemical and isotopic compositions of rocks, ores, and hydrothermal minerals from the Rainbow and Logachev-2 hydrothermal fields, supplement to: Lein, Alla Yu; Ul'yanova, Nina V; Ul'yanov, Alexander A; Cherkashov, Georgy A; Stepanova, Tamara V (2001): Mineralogy and geochemistry of sulfide ores in ocean-floor hydrothermal fields associated with serpentinite protrusions. Russian Journal of Earth Sciences, 3(5), 371-393

DOI

The aim of this paper is to analyze and compare mineralogy and geochemistry of copper-zinc sulfide ores from the Logachev-2 and Rainbow hydrothermal fields of the Mid-Atlantic Ridge (MAR) confined to serpentinite protrusions. It was found that Zn(Fe) and Cu, Fe(Zn) sulfides had been deposited in black smokers pipes almost simultaneously from intermittently flowing, nonequilibrium H2S-low solutions of different temperatures. Pb isotope composition confirmed that the deep oceanic crust had been a source of lead. The ores from the Rainbow field are 20-fold higher in Co than ores restricted to basalts and show a high ratio of Co/Ni=46. The ores from the Rainbow field are enriched in 34S isotope (aver. d34S=10 per mil) because of constant flow of cold sea water into the subsurface zone of the hydrothermal system. Ores from the Logachev-2 field are 8 times higher in gold compared to other MAR regions. Sulfide ores from the Rainbow and Logachev-2 fields have no analogues among MAR ore occurrences in terms of enrichment in valuable components (Zn, Cd, Co, and Au).

Identifier
DOI https://doi.org/10.1594/PANGAEA.745044
Related Identifier http://elpub.wdcb.ru/journals/rjes/rus/v03/rje01068/rje01068.htm
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.745044
Provenance
Creator Lein, Alla Yu; Ul'yanova, Nina V; Ul'yanov, Alexander A; Cherkashov, Georgy A; Stepanova, Tamara V
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
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 Collection of Datasets; Collection
Format application/zip
Size 10 datasets
Discipline Earth System Research
Spatial Coverage (-44.940W, 14.720S, -33.901E, 36.230N); Rainbow Hydrothermal Field; Logachev-2 relict hydrothermal field