Portal de Periódicos da CAPES

Nuevos datos sobre mineralizaciones de vermiculita asociadas a rocas ultrabásicas de la provincia de Málaga: Carratraca

1986; Spanish National Research Council; Volume: 42; Issue: 6 Linguagem: Espanhol

10.3989/egeol.86426767

1988-3250

Francisco Javier Luque del Villar, M. Rodas, Ángel Justo Érbez,

Archaeological and Historical Studies

The vermiculite studied in this paper is located within a pegmatitic pocket-like dike in the ultramafic massif of Sierra de Aguas (Carratraca , Malaga). 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.