Nuevos datos sobre mineralizaciones de vermiculita asociadas a rocas ultrabásicas de la provincia de Málaga: Carratraca
DOI:
https://doi.org/10.3989/egeol.86426767Keywords:
Vermiculite, Ultrasbasic rocks, Serpentinization, Málaga.Abstract
The vermiculite studied in this paper is located within a pegmatitic pocket-like dike in the ultramafic massif of Sierra de Aguas (Carratraca , Málaga). The behaviour of natural and Mg-saturated samples is that of a trioctahedral vermiculite. Nevertheless, when the samples are saturated with K+, no collapse to 10 A is observed. This fact is probably due to the presence of brucitic layers in the interlayer space of the vermiculite, although a true chlorite structure is not reached. A genesis of vermiculite, from a magnesium-rich mica, temporally related with the meteoric serpentinization of the massif is proposed. Moreover, the genetic relationship of these verrniculitebearing dikes with the ultramafic massifs is discussed.
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