Alkaline Rocks and Carbonatites of the World

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Ubari

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Occurrence number: 
025-00-071
Country: 
Brazil
Region: 
Minas Gerais
Location: 
Longitude: -43.08, Latitude: -21.1

An oval-shaped intrusion 4x2.5 km in diameter, Ubari forms a hill cutting Precambrian biotite gneisses. The predominant rock type is a syenite of perthite, aegirine-augite and biotite. There is a little quartz together with apatite, sphene and magnetite. Eckermannite-bearing rocks are thought to be fenites.

References: 
BRANDALISE, L.A., RIBEIRO, J.H. and FERRARI, P.G. 1976. Projeto Vale do Paraiba do Sul: Relatorio Final. Departamento Nacional de Producao Mineral Convenio DNPM-CPRM, Ministerio das Minas e Energia, Belo Horizonte
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith