Publication: Geocronología Rb-Sr de los leucogranitos del complejo plutónico
de Burguillos del Cerro (Badajoz)
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Publication Date
1997
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Sociedad Geológica de España
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Abstract
A Rb-Sr whole-rock array corresponding to an age of circa 330 M.a. has been obtained forthe slightly
to moderately peraluminous leucogranites of the Burguillos del Cerro Massif. The samples were collected
from several different leucogranite bodies and the data demostrate that the Sr-isotope composition was
not homogeneous at the time of intrusion. It reveals the absence of isotopic homogenity of the original
magmas. However two samples from the same body yield a tie line age of 330±9 M.a. i.e. Lower
Carboniferous. Furthermore, Rb-Sr isotopic evidence suggests that the alterations of the albititic type (albite
+ quartz), that are found within these granites, probably took place soon after the crystallization of the
magmas. Fluid inclusion evidence supports this intelpretation.