Large Salt Beds on the Surface of the Ross Ice Shelf Near Black Island, Antarctica

• Published in: Journal of Glaciology
• Main Authors: Brady, Howard Thomas, Batts, Barry
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1981
• Subjects: Earth-Surface Processes; Victoria Land; McMurdo Sound; Ross Ice Shelf; Black Island; Antarc*; Antarctica; Ice Shelf; Journal of Glaciology
• Online Access: http://dx.doi.org/10.1017/s0022143000011187; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000011187

Abstract An extensive system of mirabilite (Na 2 SO 4 · 10H 2 O) beds has been mapped on the Ross Ice Shelf near Black Island. The salt beds are normally underlain by a thin layer of mud and their surface is covered by a non-marine algal mat and boulder lag. These authors suggest the salt has been formed by the displacement of sub-ice-shelf brines to the ice-shelf surface. Evidence also suggests that other terrestrial mirabilite beds in the McMurdo Sound area were formed in the same manner and deposited by the Ross Ice Shelf during its Wisconsin retreat from McMurdo Sound. Mirabilite salt in the dry valleys, southern Victoria Land, may have also originated from melt waters which dissolved ice-shelf mirabilite beds.