Contrasts of Fluid Chemistry, Isotope Compositions and Temperature in Modern Seafloor Hydrothermal Systems

Author

Bortnikov, N.S.

Author_Institution

Russian Acad. of Sci., Moscow

fYear

2007

fDate

Sept. 29 2007-Oct. 4 2007

Firstpage

1

Lastpage

8

Abstract

A comparative study of fluid inclusions, He and hydrocarbons in fluid inclusions trapped in sulfides and S isotopes in sulfides from modern sulfide edifices on the Mid-Atlantic ridge (Rainbow, Logachev, Broken Spur, TAG), East Pacific Rise (EPR 9 N, 21 N) and in the Manus and Lau back-arc basins (Pacific) was carried out. Variations in fluid salinity were found. Methane through butane occur in fluids. R/Ra ratio indicates a contribution of helium from upper mantle and recycled seawater to fluids. The S isotope ratio suggest a mixing of sulfur derived from different sources.

Keywords

helium; isotope relative abundance; oceanic crust; rocks; seafloor phenomena; sulphur; Broken Spur hydrothermal field; He; Lau back arc basin; Logachev hydrothermal field; Manus back arc basin; Rainbow hydrothermal field; S; TAG hydrothermal field; east Pacific rise; fluid inclusions; fluid salinity variations; hydrocarbon; midAtlantic ridge; seafloor hydrothermal system fluid chemistry; seafloor hydrothermal system isotope composition; seafloor hydrothermal system temperature; sulfides; Chemistry; Helium; Isotopes; Minerals; Ocean temperature; Ores; Paramagnetic resonance; Sea floor; Technical Activities Guide -TAG; Underwater vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS 2007

Conference_Location

Vancouver, BC

Print_ISBN

978-0933957-35-0

Electronic_ISBN

978-0933957-35-0

Type

conf

DOI

10.1109/OCEANS.2007.4449116

Filename

4449116