Alkaline Rocks and Carbonatites of the World

Setup during HiTech AlkCarb: an online database of alkaline rock and carbonatite occurrences

Marie Mirim

stripes

Occurrence number: 
025-00-002
Country: 
Brazil
Region: 
Amazonas
Location: 
Longitude: -66.2, Latitude: 0.5
Carbonatite: 
No

This is an elongated area within the Guianese gneiss complex consisting of aegirine-riebeckite and aegirine granites with orientated, cataclastic fabrics. Biotite and occasionally fluorite are present. Boundaries to the peralkaline granite have not been mapped.

References: 
PINHEIRO, S. da S., FERNANDES, P.E.C.A., PEREIRA, E.R., VASCONCELOS, E.G., PINTO, A. do C., MONTALVAO, R.M.G. de, ISSLER, R.S., DAL'AGNOL, R., TEIXEIRA, W. and FERNANDES, C.A.C. 1976. DNPM Projeto Radambrasil Folha NA. 19 Pico da Neblina. Levantamento de Recursos Naturais, Geologia, 11: 17-137
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith