Alkaline Rocks and Carbonatites of the World

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Sacramento (Mata Da Corda)

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Occurrence number: 
025-00-068
Country: 
Brazil
Region: 
Minas Gerais
Location: 
Longitude: -47.42, Latitude: -19.83

The Sacramento complex consists of a sequence of alkali basaltic flows, tuffs, breccias, dykes and plugs of Cretaceous age. Near Sacramento the rocks outcrop as bentonitic laterites, but fresh rock obtained by drilling contains leucite and has been described as ugandite and as 'akin to micaceous kimberlite'. It is poorly known.

Age: 
43 Ma (Hasui, unpublished quoted in Ulbrich and Gomes, 1981).
References: 
BARBOSA, O., BRAUN, O.P.G., DYER, R.C. and CUNHA, C.A.B.R. da, 1970. Geologia da regiao do triangulo Mineiro. Boletim, Departamento Nacional de Producao Mineral. Divisao de Fomento da Producao Mineral. Rio de Janeiro, 136: 1-140. MURTA, R.L.L. 1965. Nota preliminar sobre a leucita de Sacramento - M.G. Anais da Academia Brasileira de Ciencias, 37: 463-70. 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