RT Journal Article
T1 Caracterización química de esfenas ígneas y aplicación del geotermómetro de Zr en esfena a procesos tardimagmáticos
T1 Chemical characterization of igneous sphene and application of the Zr-in-sphene thermometer to tardimagmaticprocesses
A1 Rodríguez, Javier
A1 Vegas, Néstor
A1 Esteban, José Julián
A1 Tubía, José María
AB This preliminary work illustrates the chemical composition of sphene from Variscan tonalites withsphene-centered ocellar texture (Ribadelago pluton, NW Iberian Massif). The ocellar texture is linked withthe percolation of a tardimagmatic melt, with trondhjemitic affinities, through an hyperdense crystal mush.Chemical zoning in sphene, revealed by BSE imaging, shows a heterogeneous distribution of heavy traceelements (Nb, Y, Ce and Zr) that depicts concentric, oscillatory, sector and patchy patterns. Application ofthe Zr-in-sphene thermometer yields a temperature range of 746 to 778 ºC for the crystallization ofsphene in the tardimagmatic melt. It also constitutes a minimum temperature estimation for biotite partialdestabilization in this lithology
YR 2009
FD 2009
LK http://hdl.handle.net/10272/7958
UL http://hdl.handle.net/10272/7958
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026