Skip to main content
U.S. flag

An official website of the United States government

Chemical composition of a saline lake on Enderbury Island, Phoenix Island Group, Pacific Ocean

January 1, 1973

Ion activity products for the dissolution of calcite, aragonite, gypsum, monetite, brushite, dolomite, magnesite, hydroxyapatite, and fluorapatite were calculated for a South Pacific guano island brine with an ionic strength of 6.4. Environmental conditions for the brine at the time of analysis and of sampling indicated saturation with respect to calcite, aragonite, gypsum, hydroxyapatite and fluorapatite; a comparison of the ion activity products and equilibrium constants indicated saturation or supersaturation with respect to most minerals found in lake sediments or elsewhere on the island. The results suggest that chemical thermodynamic calculations for brines may have some usefulness despite the many assumptions and estimations that must be made.

Citation Information

Publication Year 1973
Title Chemical composition of a saline lake on Enderbury Island, Phoenix Island Group, Pacific Ocean
DOI
Authors Robert A. Gulbrandsen, David W. Brown
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Research of the U.S. Geological Survey
Series Number
Index ID 70159814
Record Source USGS Publications Warehouse
USGS Organization