Premium
Cryogenic physico‐chemical precipitations: Iron, silica, calcium carbonate
Author(s) -
Vogt Thea
Publication year - 1990
Publication title -
permafrost and periglacial processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.867
H-Index - 76
eISSN - 1099-1530
pISSN - 1045-6740
DOI - 10.1002/ppp.3430010308
Subject(s) - calcite , frost weathering , geology , calcium carbonate , quaternary , alluvium , carbonate , mineral , geochemistry , mineralogy , frost (temperature) , carbonate minerals , geomorphology , chemical engineering , paleontology , soil water , soil science , materials science , metallurgy , engineering
In Quaternary and present‐day alluvial deposits, secondary mineral accumulations are common. Previous theoretical and experimental studies have shown the occurrence of frost‐related iron and calcium carbonate precipitations. Microscopic and ultramicroscopic observations of alluvial materials from Quaternary cold periods allow the recognition of diagnostic features of cryogenic calcite crystallizations. Some iron and silica concentrations also suggest frost control, although further laboratory experiments are needed to obtain a satisfactory understanding of the mechanisms concerning these precipitations. Nevertheless, it can be suggested that the migration of minerals under frost action is probably more important than previously taken into account.