INVESTIGADORES
RAPALINI Augusto Ernesto
congresos y reuniones científicas
Título:
MAGNETIC FABRICS OF LATE TO POST-TECTONIC PALEOPROTEROZOIC INTRUSIVE BODIES OF THE PIEDRA ALTA TERRANE, RÍO DE LA PLATA CRATON, URUGUAY
Autor/es:
FRANCESCHINIS, PABLO R.; RAPALINI, AUGUSTO E.; SANCHEZ BETTUCCI, LEDA; MARTINEZ DOPICO, CARMEN; MILANESE, FLORENCIA
Lugar:
Querétaro
Reunión:
Congreso; LatinMag 2017; 2017
Institución organizadora:
Asociación Latinoamericana de Paleomagnetismo y Geomagnetismo
Resumen:
Nine Paleoproterozoic intrusive bodies of the Piedra Alta terrane, in western Uruguay, with ages between2.2 and 2.0 Ga, were sampled in order to obtain information on emplacement kinematics and regional stressregime during intrusion by means of studies of anisotropy of magnetic susceptibility (AMS). Petrographicthin sections were analyzed in order to obtain information about the degree of deformation and its potentialinfluence in the AMS results. Most plutons show K1 subvertical axes and E-W subvertical foliations planessuggesting an extensional N-S regional stress field controlling the magma ascent. This is consistent with theE-W structural grain of the Piedra Alta terrane and the geographic distribution of the plutons in the San Josémetamorphic belt.
