RT Journal Article
T1 Transformación de andalucita a sillimanita en granitos peralumínicos del batolito de los Montes de Toledo: implicaciones petrogenéticas
T1 Andalusite-sillimanite transformation in peraluminous granites of the Montes de Toledo Batholith: petrogeneticalimplications
A1 Merino, E.
A1 Villaseca, Carlos
A1 Pérez Soba, C.
A1 López García, José Ángel
AB The Montes de Toledo Batholith comprises several felsic peraluminous granitic plutons characterized bythe presence of two Al2SiO5 polymorphous: andalusite and sillimanite (as fibrolitic variety). Textural featuresindicate an igneous origin for andalusite, variably replaced by muscovite and fibrolite around it. We proposea combination of factors to explain this probable magmatic reaction: the decrease in minor elementcontents of andalusite (Fe, Mg, Mn, Ti) and the increase of volatiles in the melt (B, P, F, H2O) along itscooling. This chemical variation influences the stability of both polymorphs, crystallizing initially igneousandalusite and, when the Fe content decreases, the sillimanite, in relation with muscovite, in a restrictedP-T space close to the granite solidus conditions
YR 2008
FD 2008
LK http://hdl.handle.net/10272/8294
UL http://hdl.handle.net/10272/8294
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026