PRELIMINARY RESULTS FROM PALEOMAGNETIC RECORDS ON LAKE SEDIMENTS FROM SOUTH AMERICA

GOGORZA, C.S.G.; I. DI TOMMASO; A. M. SINITO; B. JACKSON; H. NUÑEZ; CREER, K.M.; VILAS, J.F.

Studia geophysica et geodaetica

StudiaGeo s.r.o.

Lugar: Praga; Año: 1998 p. 12 - 29

0039-3169

Abstract. The preliminary results of paleomagnetic and radiocarbon dating of late pleistocene-holocene sediments from two lakes of south-western Argentina (41°S, 71.5°W) are presented. The magnetic susceptibility, intensity and direction of the natural remanent magnetisation were measured. Stability of the natural remanent magnetisation was investigated by alternating field demagnetisation. The magnetic parameters allowed correlation between cores within each lake. d13C analysis, total organic content measurements and C14 dating were carried out. A model of sedimentation is suggested. Using this model and the correlation, curves of variations of magnetic inclination and declination along time are shown.