Sedimentary analysis and magnetic properties of Lake Anonima, Vega Island

CHAPARRO, M.A.E.; CHAPARRO, M.A.E.; CÓRDOBA, F.,; LECOMTE, K.; GARGIULO, J.D.; BARRIOS, A.; URÁN, G.; MANOGRASSO CZALBOWSKI, T.; LAVAT, A.; BÖHNEL, H.

ANTARCTIC SCIENCE

CAMBRIDGE UNIV PRESS

Lugar: Cambridge; Año: 2017 vol. 29 p. 429 - 444

0954-1020

During austral summer Lake Anónima experiences important changes in salinity and lake-level fluctuations. Physicochemical data and field observations indicate that evaporation processes are dominant and that the water inflow is mainly provided by snow meltwater and streams. Our integrated analysis (magnetic studies, XRD and FTIR) allows us identifying magnetite and greigite minerals in these lake sediments. Such ferrimagnetic minerals have very fine grain sizes (