![]() RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 2, NO. 3, PAGES 327–340, doi:10.2205/2000ES000049, 2000
Sulfur and carbon isotope in active hydrothermal fields of the Mid-Atlantic RidgeA. Yu. Lein Institute of Oceanology RAS, Moscow, RussiaAbstract
[1] Discussed in this paper are the isotopic-geochemical characteristics of the "axial" and
"deep crustal" circulation hydrothermal systems, based on the experimental data available for the isotopic
compositions of sulfur and carbon compounds in hot solutions, in sulfide ores, and in the biomass of
hydrothermal community organisms in four MAR active fields of different ages ( 14o, 26o, 29o, and
36o N). The deep crustal systems differ from the axial ones by their higher concentrations of isotopically
heavy CH
4(d13 C=
- 13.4/
- 14.3) in their fluids and petroleum hydrocarbons in sulfide ores.
The proved isotopic
C org heterogeneity in the sulfide ores proved its polygenetic origin.
The main
C org constituent in all ores is the "fresh" and/or thermally transformed biomass
of hydrothermal community organisms
living at the expense of the chemical synthesis of the H
2 S, H
2, and other reconstructed compounds of hydrothermal
water, differing from the common
C org synthesized in the ocean either by the anomalously light
( d13 C
Received 16 November 2000; published 25 February 2001. Keywords: sulfur, carbon isotope, active hydrothermal fields, Mid-Atlantic Ridge, isotopic-geochemical characteristics. ![]() Citation: Lein, A. Yu. (2000), Sulfur and carbon isotope in active hydrothermal fields of the Mid-Atlantic Ridge, Russ. J. Earth Sci., 2, No.3, 327-340, doi:10.2205/2000ES000049. Copyright 2001 by the Russian Journal of Earth Sciences Powered by TeXWeb (Win32, v.2.0). |