TY - JOUR N2 - Mineral composition of bedrock is the main factor determining salt mineralization in the weathering zone of Seymour (Marambio) Island (maritime — Antarctic continent climatic boundary). Supply of salts by sea water spray can accelerate weathering process, modify chemical formula of salt minerals and give ephemeral efflorescences of easy soluble chlorides and partially longer lasting gypsum on the surface. Microbiologically mediated oxidation of sulphides and followed acid sulphate drainage formed K and Na jarosite, basic amorphous aluminium sulphate, gypsum, aluminium bearing ferrihydrite and ankerite in weathering zone of Paleogene sediments. Intense alteration of well-lithified, calcareous sandstones of unit 1 of the López de Bertodano Formation (Cretaceous) on old erosion surface led localy to surface mineralization comparable with that found in Antarctic Continent. Stones laying on the soil surface are covered by thin red film of ferrihydrite above the soil level and by light green crust of aragonite coloured by glauconite pigment on the underground side. Most of the Cretaceous sediment does not contain sulphides nor alteration susceptible silicates thus ephemeral sea salts efflorescences observed on its surface are more prominent than in another places. L1 - http://journals.pan.pl/Content/111047/PDF-MASTER/1993-2_153-168.pdf L2 - http://journals.pan.pl/Content/111047 PY - 1993 IS - No 2 EP - 168 KW - Antarctica KW - Seymour (Marambio) Island KW - weathering KW - mineralogy KW - microbiology A1 - Tatur, Andrzej A1 - Barczuk, Andrzej A1 - del Valle, Rodolfo A1 - Sletten, Ronald A1 - Kicińska, Ewa PB - Polish Academy of Sciences PB - Committee on Polar Research VL - vol. 14 DA - 1993 T1 - Surface mineralization on Seymour Island, Antarctica SP - 153 UR - http://journals.pan.pl/dlibra/publication/edition/111047 T2 - Polish Polar Research ER -