Chemical and isotopic compositions and age of carbonates from the Lost City hydrothermal field, Mid-Atlantic Ridge
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| Autores principales: | , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2007
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| _version_ | 1867168558198292480 |
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| author | Lein, Alla Yu Bogdanova, Olga Yu Bogdanov, Yury A Magazina, Larissa O |
| author_facet | Lein, Alla Yu Bogdanova, Olga Yu Bogdanov, Yury A Magazina, Larissa O |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Two genetically different types of authigenic carbonate mounds are studied: (1) from an active hydrothermal field related to serpentinite protrusions in a zone of intersection of a transform fracture zone with the Mid-Atlantic Ridge, (2) from an active field of methane seepings in the Dnieper canyon of the Black sea. General geochemical conditions, under which authigenic carbonate formation occurs within these two fields, were found. They include: presence of reduced H2S, H2, and CH4 gases at absence of free oxygen; high alkalinity of waters participating in carbonate formation; similarity of textural and structural features of authigenic aragonite, which represents the initial carbonate mineral of the mounds; paragenesis of aragonite with sulfide minerals; close relation of carbonate mounds with communities of sulfate-reducing and methane-oxidizing microorganisms. A new mechanism of formation of hydrothermal authigenic carbonates is suggested. It implies their microbial sulfate reduction over hydrogen from fluid in the subsurface mixing zone of hydrothermal solution and adjacent seawater. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_765175 |
| institution | PANGAEA |
| language | en |
| publishDate | 2007 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Chemical and isotopic compositions and age of carbonates from the Lost City hydrothermal field, Mid-Atlantic Ridge Lein, Alla Yu Bogdanova, Olga Yu Bogdanov, Yury A Magazina, Larissa O Akademik Mstislav Keldysh; AMK47; AMK47-4364-M1; AMK47-4365-M2; AMK47-4366-M; AMK47-4367-M1; AMK47-4368-M2; AMK47-4371-M2; AMK47-Lost_City; Archive of Ocean Data; ARCOD; Lost City Hydrothermal Field, Mid-Atlantic Ridge; MIR; MIR-1; MIR-1 deep-sea manned submersible; MIR-2; MIR-2 deep-sea manned submersible; MIR deep-sea manned submersible Two genetically different types of authigenic carbonate mounds are studied: (1) from an active hydrothermal field related to serpentinite protrusions in a zone of intersection of a transform fracture zone with the Mid-Atlantic Ridge, (2) from an active field of methane seepings in the Dnieper canyon of the Black sea. General geochemical conditions, under which authigenic carbonate formation occurs within these two fields, were found. They include: presence of reduced H2S, H2, and CH4 gases at absence of free oxygen; high alkalinity of waters participating in carbonate formation; similarity of textural and structural features of authigenic aragonite, which represents the initial carbonate mineral of the mounds; paragenesis of aragonite with sulfide minerals; close relation of carbonate mounds with communities of sulfate-reducing and methane-oxidizing microorganisms. A new mechanism of formation of hydrothermal authigenic carbonates is suggested. It implies their microbial sulfate reduction over hydrogen from fluid in the subsurface mixing zone of hydrothermal solution and adjacent seawater. |
| title | Chemical and isotopic compositions and age of carbonates from the Lost City hydrothermal field, Mid-Atlantic Ridge |
| topic | Akademik Mstislav Keldysh; AMK47; AMK47-4364-M1; AMK47-4365-M2; AMK47-4366-M; AMK47-4367-M1; AMK47-4368-M2; AMK47-4371-M2; AMK47-Lost_City; Archive of Ocean Data; ARCOD; Lost City Hydrothermal Field, Mid-Atlantic Ridge; MIR; MIR-1; MIR-1 deep-sea manned submersible; MIR-2; MIR-2 deep-sea manned submersible; MIR deep-sea manned submersible |
| url | https://doi.org/10.1594/PANGAEA.765175 |