%0 Journal Article
%T Composici¨®n de biotitas y anf¨ªboles del Batolito de Las Chacras - Potrerillos: Implicancias geoqu¨ªmicas para el magmatismo Dev¨®nico Medio de la Sierra de San Luis
%A Iannizzotto
%A Noelia F
%A L¨®pez De Luchi
%A M¨®nica G
%J Serie correlaci£¿3n geol£¿3gica
%D 2012
%I Scientific Electronic Library Online
%X the las chacras - potrerillos batholith is the largest devonian igneous unit that crops out in sierra de san luis. according to its silica content it is divided into two suites: monzonitic ( 65% sio2). new mineral chemical data obtained by electronic microprobe on biotites and amphiboles of both suites are presented. the analysis of biotite composition indicates that mg/(mg + fe) is higher for the monzonitic suites and the calc-alkaline, metaluminous to peraluminous magmatic signature. emplacement pressure calculated from the amphibole data are bracketed between 3,3 - 4,6 kbar (monzonitic suite) and 4,2 - 4,7 kbar (granitic suite).
%K magmatism
%K devonian
%K biotite
%K amphibole.
%U http://www.scielo.org.ar/scielo.php?script=sci_abstract&pid=S1666-94792012000200003&lng=en&nrm=iso&tlng=en