Skip to main content
U.S. flag

An official website of the United States government

Silica in alkaline brines

January 1, 1967

Analysis of sodium carbonate-bicarbonate brines from closed basins in volcanic terranes of Oregon and Kenya reveals silica contents of up to 2700 parts per million at pH's higher than 10. These high concentrations of SiO 2 can be attributed to reaction of waters with silicates, and subsequent evaporative concentration accompanied by a rise in pH. Supersaturation with respect to amorphous silica may occur and persist for brines that are out of contact with silicate muds and undersaturated with respect to trona; correlation of SiO2 with concentration of Na and total CO2 support this interpretation. Addition of moredilute waters to alkaline brines may lower the pH and cause inorganic precipitation of substantial amounts of silica.

Citation Information

Publication Year 1967
Title Silica in alkaline brines
Authors B.F. Jones, S.L. Rettig, H.P. Eugster
Publication Type Article
Publication Subtype Journal Article
Series Title Science
Index ID 70011556
Record Source USGS Publications Warehouse