Alkaline Rocks and Carbonatites of the World

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Peixe

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Occurrence number: 
025-00-041
Country: 
Brazil
Region: 
Goias
Location: 
Longitude: -48.55, Latitude: -12.92

An intrusion some 30 km from north to south and up to 8 km wide, Peixe is emplaced in gneisses of the Araxa Group, but in the south at least, is surrounded by pegmatitic granites. The principal alkaline rocks are litchfieldites consisting of albite-oligoclase, microcline, green biotite, nepheline and accessories. The intrusion is poorly known geologically.

References: 
MARCHETTO, C.M.L. 1973. Nota sobre a ocorrencia de um litchfieldito no Morro da Estrela, Municipio de Porto Nacional (Goias). Anais Congresso Brasileiro de Geologia, 27: 85-6. MARINI, O.J., FUCK, R.A., DARDENNE, M.A. and FARIA, A.de, 1977. Contribuicao a geologia do Pre-Cambriano da porcao central de Goias. Revista Brasileira de Geociencias, 7: 304-24
Location: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith