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