Peribatholitic vein-type uranium deposit, meaning that the uraniferous hydrothermal veins are formed in the rocks next to an intruding granite and not in the granite itself.
Located at Lameira das Pedrinhas, just outside Nisa village.
Part of the Nisa uranium district (about 6x2 km2).
For a very interesting study about the uraniferous province of Alto-Alentejo, and in particular about the Nisa area and the Nisa ore deposits, see Peinador Fernandes (1982).
Refs.:
- A. Peinador Fernandes; "Prospecção Emanométrica-Experimental" (with abstract in French), Estudos, Notas e Trabalhos do Serviço de Fomento Mineiro, Vol. XXV, Fasc. 1-2, Direcção Geral de Geologia e Minas, 1982, pags. 105-134.
- Portuguese Geological Chart, folio 28-B and the respective explicative Notice, edited by the Portuguese Geological Services in 1965.
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Map Reference: 39°31'N , 7°39'W
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