Aeromagnetic evidence of the jurassic rifting in the northwestern Chubut Province, Argentina.

CHERNICOFF, C. J.; CABALERI, N.; SALANI, F. M.

Congreso; 7th International Congress of Geophysics; 2001

International Geophysics Union

The Jurassic sedimentary and volcanic sequence (Cañadón Asfalto Formation) of the northwestern Chubut province was started by an extensional regime. The precise location and geometry of a segment of the Jurassic rift, located in the Cerro Condor area, is distinguished as a narrow, north-south trending magnetic high rendered by the magnetite rich basalts that lie at the base of the sedimentary sequence, which, in turn, are displaced by east-west wrench faults evidenced by cross magnetic lineaments.