Carvalho, C.M.N. Alteration phyllosilicates in the Iberian Pyrite Belt massive sulphide deposits: an XRD study - Lisboa Instituto Geológico e Mineiro 1998 - pp. B83-B86 ilus. Subjects--Topical Terms: ALTERACIÓN HIDROTERMALDIFRACCION RAYOS XFILOSILICATOSSULFUROS MASIVOS