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Geocronología Rb-Sr de los leucogranitos del complejo plutónico de Burguillos del Cerro (Badajoz)

Bachiller Jareño, Nuria and Galindo Francisco, Mª del Carmen and Darbishyre, D.P.F. and Casquet, César (1997) Geocronología Rb-Sr de los leucogranitos del complejo plutónico de Burguillos del Cerro (Badajoz). Geogaceta, 21 . pp. 29-30. ISSN 0213-683X

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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.

Item Type:Article
Uncontrolled Keywords:Leucogranites, Geochronology, Isotope geochemistry, Extremadura, Spain
Subjects:Sciences > Geology > Petrology
ID Code:11463
Deposited On:04 Nov 2010 12:31
Last Modified:04 Nov 2010 12:31

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