Alkaline Rocks and Carbonatites of the World

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Itanhaem

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Occurrence number: 
025-00-096
Country: 
Brazil
Region: 
Sao Paulo
Location: 
Longitude: -46.78, Latitude: -24.18

Itanhaem is a series of biotite tinguaite dykes cutting shield rocks. In the same area dykes of olivine sovite are reported.

Economic: 
Th and RE mineralization is reported by Rodrigues and Lima (1984).
Age: 
129.5 Ma by K-Ar on biotite from tinguaite (Amaral et al. 1967).
References: 
AMARAL, G., BUSHEE, J., CORDANI, U.G., KAWASHITA, K. and REYNOLDS, J.H. 1967. Potassium-argon ages of alkaline rocks from southern Brazil. Geochimica et Cosmochimica Acta, 31: 117-42. RODRIGUES, C. de S. and LIMA, P.R.A. dos S. 1984. Carbonatitic complexes in Brazil. Companhia Brasileira de Metalurgia e Mineracao: 1-17. ULBRICH, H.H.G.J. and GOMES, C.B. 1981. Alkaline rocks from continental Brazil. Earth Science Reviews, 17: 135-54
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith