Chemical and isotopic compositions of rocks, ores, and hydrothermal minerals from the Rainbow and Logachev-2 hydrothermal fields
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2001
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| _version_ | 1867167664224337920 |
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| author | Lein, Alla Yu Ul'yanova, Nina V Ul'yanov, Alexander A Cherkashov, Georgy A Stepanova, Tamara V |
| author_facet | Lein, Alla Yu Ul'yanova, Nina V Ul'yanov, Alexander A Cherkashov, Georgy A Stepanova, Tamara V |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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). |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_745044 |
| institution | PANGAEA |
| language | en |
| publishDate | 2001 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Chemical and isotopic compositions of rocks, ores, and hydrothermal minerals from the Rainbow and Logachev-2 hydrothermal fields Lein, Alla Yu Ul'yanova, Nina V Ul'yanov, Alexander A Cherkashov, Georgy A Stepanova, Tamara V Akademik Mstislav Keldysh; AMK41; AMK41-3840-10; AMK41-3840-11; AMK41-3840-12; AMK41-3840-13; AMK41-3840-2; AMK41-3840-3; AMK41-3840-4; AMK41-3840-5; AMK42; AMK42-3959-3; AMK42-3982-M1-1; AMK42-3982-M1-2; AMK42-3982-M1-3; AMK42-3982-M1-4; AMK42-3982-M1-5; AMK42-3982-M1-6; Archive of Ocean Data; ARCOD; FBG; Logachev-2 relict hydrothermal field; MIR; MIR deep-sea manned submersible; Photo grab; PL98; PL98-384; Professor Logachev; Rainbow Hydrothermal Field 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). |
| title | Chemical and isotopic compositions of rocks, ores, and hydrothermal minerals from the Rainbow and Logachev-2 hydrothermal fields |
| topic | Akademik Mstislav Keldysh; AMK41; AMK41-3840-10; AMK41-3840-11; AMK41-3840-12; AMK41-3840-13; AMK41-3840-2; AMK41-3840-3; AMK41-3840-4; AMK41-3840-5; AMK42; AMK42-3959-3; AMK42-3982-M1-1; AMK42-3982-M1-2; AMK42-3982-M1-3; AMK42-3982-M1-4; AMK42-3982-M1-5; AMK42-3982-M1-6; Archive of Ocean Data; ARCOD; FBG; Logachev-2 relict hydrothermal field; MIR; MIR deep-sea manned submersible; Photo grab; PL98; PL98-384; Professor Logachev; Rainbow Hydrothermal Field |
| url | https://doi.org/10.1594/PANGAEA.745044 |