Alkaline Rocks and Carbonatites of the World

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Sucunduri Dome

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Occurrence number: 
025-00-012
Country: 
Brazil
Region: 
Amazonas
Location: 
Longitude: -59.47, Latitude: -8.53

Sucunduri is a 700 km2 dome in the Precambrian Teles Pires and Beneficente Groups, which is pierced by a number of plugs, necks and dykes of alkali syenite, lusitanite and nepheline syenite, with some phonolite and trachyte flows. The area is poorly known geologically but is tentatively correlated with the Canama (No. 13) syenitic intrusions.

Age: 
1260 Ma by Rb-Sr (Iwanuch, 1981).
References: 
IWANUCH, W. 1981. Geologia da regiao do Domo do Sucunduri. MS Thesis (unpublished). University of Sao Paulo, Institute of Geosciences. 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