Loesses as a result of evolution of the water-rock system under weak water exchange

S. L. Shvartsev

Результат исследования: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

Analysis of the natural abundance of loesses showed that they occur in the same zones as sodic waters, namely, forest-steppe, steppe and mountain-steppe landscapes with a weak water exchange (subsurface runoff is <0.3 l/s.km 2).Thermodynamic calculation of the sodic-water-rock equilibrium evidences that thewaters are always in equilibrium with montmorillonite, hydromica, kaolinite, and calcite but are in nonequilibrium with endogenous aluminosilicates. Therefore, in alkaline media sodic waters permanently (though slowly) dissolve terrigenous sediments and form clays and calcite, i.e., a complex of secondary deposits called loesses. The conclusion has been drawn that loesses and sodic waters are paragenetic products of the same geologic process running at the particular stage of evolution of thewater-rock system. This stage is to be called sodic or sodic-loess.

Язык оригиналаАнглийский
Заголовок главной публикацииWater-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12
Страницы153-156
Количество страниц4
Том1
Статус публикацииОпубликовано - 1 дек 2007
Событие12th International Symposium on Water-Rock Interaction, WRI-12 - Kunming, Китай
Длительность: 31 июл 20074 авг 2007

Другое

Другое12th International Symposium on Water-Rock Interaction, WRI-12
СтранаКитай
ГородKunming
Период31.7.074.8.07

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ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Water Science and Technology

Цитировать

Shvartsev, S. L. (2007). Loesses as a result of evolution of the water-rock system under weak water exchange. В Water-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12 (Том 1, стр. 153-156)