NEW EDIACARAN PALEOMAGNETIC POLE FOR THE RIO DE LA PLATA CRATON: PALEOGEOGRAPHIC RESTRICTIONS IN THE ASSEMBLY OF WESTERN GONDWANA

RAPALINI, AUGUSTO E.; POIRÉ, DANIEL G.; FRANCESCHINIS, PABLO R.; ARROUY, MARÍA JULIA; AFONSO, JHON; TRINDADE, RICARDO

Congreso; Latinmag 2019; 2019

Asociación Latinoamericana de Paleomagnetismo y Geomagnetismo

Preliminary paleomagnetic data obtained in marls of the Avellaneda Formation (La Providencia Group) ofEdiacarian age outcropping in the Río de la Plata craton (RPC) are presented. Sampling was carried outin quarry and in a bore-core. Standard stepwise demagnetization showed a directional consistency amongboth sets of samples yielding a preliminary paleomagnetic pole located at 0.8° N, 308.4° E, (A95: 5.7°, n:68) for the Avellaneda Formation. This indicates very high latitudes for the craton and suggests that themost accepted Ediacarian apparent polar wander path (APWP) for the 600-500 Ma period for RPC must bereconsidered.