 | | Journal (article/letter/editorial) | | Springer-Verlag1986 Origin of granite at Cabo de Santo Agostinho, Northeast Brazil Leon E. Long 1, Alcides N. Sial...Department, Federal University of Pernambuco, Recife 50.000, PE, Brazil 3 Department of Geosciences, Pennsylvania...on the Atlantic coast at Cabo de Santo Agostinho, 30 km south of Recife, Brazil has been extensively studied...Twenty-three major-element analyses indicate that the Cabo granite ranges from peralkaline to peraluminous;...Microprobe analyses confirm the presence of arfvedsonite (biotite absent), and nearly total absence of |  | | Report (chapter) | | Rio de Janeiro (DGRG/UERJ), Rio de Janeiro, Brazil 2 Programa de Posgraduação, Faculdade de Geologia...UERJ, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil *Corresponding author (e-mail: mauro...However, rocks ascribed to the Cabo Granite (104 Ma) are observed in NE Brazil. In West Africa, sparse Aptian–Albian...alkaline magmatic trend is observed from Poços de Caldas to Cabo Frio, comprising igneous intrusions dated...trending NW also occur in the region extending from the Cabo Frio Province towards the Central Brazilian Craton |  | | Journal (article/letter/editorial) | | (AI203/Na20 + K20 = 0.95-0.96), contains aegirine and arfvedsonite, and is only the third occurrence of peralkaline...with an outer arcuate rim of coarse grained arfvedsonite granite. 212 R.J. W O R M A L D AND R . C...extinction. The a m p h i b o l e is mostly arfvedsonite ( T a b l e 1) in composition with strong pleochroism...Table 1 Electron microprobe analyses (wt%) of arfvedsonite and aegirine from the Narraburra Granite. Sample...'chessboard' albitization (C) and quartz (Q). (b)Arfvedsonite (A) interstitial to quartz (Q) and perthite |  | | Journal (article/letter/editorial) | | ferrocrichterite is partially altered to reibeckite/ arfvedsonite and in some cases a translucent redbrown mineral..., 1986. Origin of granite at Cabo de Santo Agostinho, northeast Brazil. Contributions to Mineralogy and |  | | Book | | .......................................... 167 Brazil..................................................particular of Africa, the U.S.S.R., Canada and Brazil, much of it inspired by the search for exploitable...Montreal area of Canada and for central Coais, Brazil. N11111ber and na111e Each occurrence has been...a n;:itional number, for example Jacupiranga is Brazil 88. This is followed by the preferred name of the.../11tematio11nl Sy111posi11111 011 Cnr/Jo11 atitt?s, Pocos de Cnlrlas: 123-33. H EINRICH, E.W. 1966. The geology |
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