El campo pegmagmático de Forcarei Norte y las mineralizaciones de fosfatos asociadas (Galicia, España).

Resumo

The aim of this paper is to present the most important mineralogical, textural and petrological characteristics of the Forcarei Norte pegmatite field. On the basis of on their internal structure, mineralogical association and field outcrop, we can establish two different types of pegmatites named 1 and 2. The first one has a well-developed internal structure around the core, and replacement aplitic units. The second one has no well-developed internal structure and it has biotite as a main mineral phase. The phosphate mineralization is made up by apatite manganese rich, eosphorite, montebrasite and possible xanthoxenite and only appear in the border zone of group 1, where fill cavities and mineral fractures or is an alteration product of plagioclase.