Open AccessFORMATION CONDITIONS OF GROUNDWATER OF THE UPPER JURASSIC OF THE CENTRAL REGIONS OF THE ZAURAL MEGAMONOCLYSIS
Author(s) -
Dmitry A. Novikov,
Aleksandr N. Pyrayev,
F. F. Dultsev,
А. В. Черных,
Svetlana V. Bakustina,
Dmitry V. Ulyanov
Publication year - 2021
Publication title -
interèkspo geo-sibirʹ
Language(s) - English
Resource type - Journals
ISSN - 2618-981X
DOI - 10.33764/2618-981x-2021-2-1-181-190
Subject(s) - geology , groundwater , isotopes of oxygen , isotopes of carbon , geochemistry , stable isotope ratio , isotope , carbon dioxide , composition (language) , paleontology , mineralogy , total organic carbon , environmental chemistry , chemistry , linguistics , physics , philosophy , geotechnical engineering , organic chemistry , quantum mechanics
The article presents the first results of complex isotope-hydrogeochemical studies of reservoir waters of the Upper Jurassic deposits of the central regions of the Zaural megamonoclysis. It was shown that most waters have a narrow distribution of oxygen and hydrogen isotopes (δD from -103.2 to -85.6 ‰ and δO from -15.4 to -12.9 ‰). Some of them have pronounced excursions on the isotopic composition, which indicates a difference in their genesis: from condensate to mixed with ancient infiltrogenic. The isotopic composition of carbon of water-dissolved carbon dioxide (δС from -41.6 to -16.3 ‰) indicates its biogenic origin and the possibility of interstratal flows from overlying horizons.