Fractionation of Oxygen and Hydrogen Isotopes at the Hydrate Gas forming in the Sea Sediments
作者:
V. I. Pashkina,
A. D. Esikov,
期刊:
Isotopenpraxis Isotopes in Environmental and Health Studies
(Taylor Available online 1990)
卷期:
Volume 26,
issue 12
页码: 600-603
ISSN:0021-1915
年代: 1990
DOI:10.1080/10256019008622444
出版商: Taylor & Francis Group
关键词: deuterium;hydrates;interstitials;isotope effects;isotopic exchange;isotope ratio;oxygen 18;sea bed;seawater;sediment-water interfaces
数据来源: Taylor
摘要:
The paper gives data on isotope composition of interstitial and near-bottom waters sampled in a region of gas-hydrate formation in the Sea of Okhotsk. The studies shows that heavy isotope of oxygen and hydrogen is used in gas-hydrate formation, with the result that isotope composition of its constitution water constitutes δ18O = +1.99‰, δD = +23‰ relatively to SMOW. Formation of autogenic carbonates leads to isotope exchange with interstitial water wich, in turn, changes its primary isotope composition in the direction of increasing of O-18 content. The near-bottom waters are isotope-light relatively to the SMOW standard and to the mean isotope composition of interstitial water in the studied region of gas-hydrate spreading.
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