Alkaline Rocks and Carbonatites of the World

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Itapitanga

stripes

Occurrence number: 
025-00-035
Country: 
Brazil
Region: 
Bahia
Location: 
Longitude: -39.45, Latitude: -14.43

These are three small intrusions of syenite for which no detailed description is available.

Economic: 
Sodalite-rich rock is quarried as a decorative stone.
Age: 
Analysis ITC 29 of Cordani et al. (1974, Fig. 1_1 and Table 2) on syenite is probably from one of these intrusions, and gave 660 Ma by Rb-Sr.
References: 
CORDANI, U., HALPERN, M. and BERENHOLE, M. 1974. Comentarois sobre as determinacoes geocronologicas do Folha Porto Alegre SH.22. In. Carta Geologica do Brasil ao miliuonesimo: texto explicativo. 70-88. Ministerio das Minas e Energia, Departamento Nacional da Producao Mineral, Brasilia
Fig. 195 The Bahia province of alkaline rocks (based principally on the Carta Geologica do Brasil ao milionesimo: Folha Salvador SD. 24 accompanying Pedreira et al. 1976).
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