Open AccessA new model of sulfur isotopes behavior in the modern submarine hydrothermal systems
Author(s) -
Е. О. Дубинина,
Е. О. Дубинина,
Н. С. Бортников,
N.S. Bortnikov
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524865593-597
Subject(s) - sulfur , submarine , hydrothermal circulation , isotope , geology , basalt , geochemistry , sulfate , seawater , chemistry , mineralogy , oceanography , paleontology , physics , organic chemistry , quantum mechanics
A model of sulfur isotope distribution at modern submarine hydrothermal systems is proposed. It is assumed that thermogenic sulfate reduction at the water-rock interaction zone takes place under closed system conditions respectively to fluid phase. As a result, the Rayleigh exhaustion with respect to the 32S isotope arises in the fluid. The model also takes into account the simultaneous extraction of reduced sulfur from surrounding rocks. The calculated fraction of extracted sulfur at the total content of reduced sulfur in the fluid varies from 0.15 to 0.06 for submarine systems associated with tholeiitic basalts and peridotites, respectively. The model application to published data can explain the well-known contradictions that have arisen during the study of the sulfur isotope composition of sulfides from world Ocean deep-sea edifices.