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PROGRAMA GEOLOGIA DO BRASIL Contrato CPRM- UFPA Nº

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Figura 3.22: Diagramas comparativos para as rochas do Tonalito Arco Verde da Folha Marajoara: (a) Diagrama<br />

Ab-An-Or normativo (O’Connor 1965, com campos de Barker 1979); (b) Diagrama K-Na-Ca com trend cálcicoalcalino<br />

(CA) de Nockolds & Allen (1953) e campo Tdh segundo Barker & Arth (1976).<br />

Figura 3.23: Diagrama de milicátions para rochas do Tonalito Arco Verde da Folha<br />

Marajoara: (a) Diagrama AxB (Debon et al. 1988); (b) Diagrama PxQ (Debon et al. 1988).<br />

Programa Geologia do Brasil – Folha Marajoara<br />

73

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