Hydrogeochemistry of the authigenic mineral-forming processes (a case study of Oxfordian deposits in the Ob-Irtysh interfluve)

D. A. Novikov, L. G. Vakulenko, P. A. Yan, F. F. Dultsev, A. V. Chernykh

Результат исследования: Научные публикации в периодических изданияхстатья по материалам конференциирецензирование

Аннотация

Results of the pioneering numerical physicochemical modeling of interactions in the water - rock system on the example of Oxfordian deposits in southern regions of the Ob-Irtysh interfluve (southeastern regions of Western Siberia) are presented.It has been established that, despite the groundwaters having low salinity (up to 46 g/dm3) of and their persistent interactions with rocks (during tens, or probably hundreds of millions of years), they practically have no equilibrium with primary (endogenous) minerals: albite, anortite, microcline.At the same time, groundwater is in equilibrium with micaceous minerals, Ca-, Na - and Mg-montmorillonites, kaolinite, Mg-chlorite. There is always a carbonate barrier in the way of groundwater attaining an equilibrium with primary aluminosilicate minerals. As a result of the detailed petrographic studies, the genetic series of authigenic minerals of the diagenetic and catagenetic phases were established in the studied silty-sandy rocks. Relict diagenetic minerals are represented by glauconite, pyrite, siderite, calcite of the first generation of precipitation, kaolinite, anatase and leucoxene. Catagenetic minerals are considerably dominated by calcite of the second and third generations of precipitation, quartz, kaolinite, whereas siderite, chlorite, albite, dolomite are developed in minor amounts. The results of petrographic studies have corroborated the thermodynamic calculations.

Язык оригиналаанглийский
Номер статьи012016
ЖурналJournal of Physics: Conference Series
Том1451
Номер выпуска1
DOI
СостояниеОпубликовано - 9 сен 2020
Событие2nd International Conference on Applied Physics, Power and Material Science, ICAPPM 2019 - Secunderabad, Telangana, Индия
Продолжительность: 20 дек 201921 дек 2019

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