A study of salt origin, distribution and weathering processes in the McMurdo Sound region, South Victoria land, Antarctica

Abstract

The results of a large number of analyses of salt deposits from the McMurdo Sound region of Antarctica are presented. These salts appear to be mainly of marine origin with minor amounts resulting from chemical weathering of bedrock. Distribution processes, transporting the salts, are governed by relative humidities. More classical processes such as dissolution and waterflow are not as important. A laboratory model is used to simulate and verify the relative humidity separation process. The role of the salts in salt weathering in Antarctica is shown to be primarily physical in nature with only minor amounts of chemical weathering taking place.