1969
DOI: 10.1017/s0016756800058222
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A simple alkalinity ratio and its application to questions of non-orogenic granite genesis

Abstract: SUMMARYCommonly used variation diagrams do not convincingly distinguish strongly alkaline, alkaline and calc-alkaline rocks over the full range of silica contents, especially for more acid varieties. In particular, the Rittmann Suite Index, a, becomes invalid once SiO2 exceeds about 70%.

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Cited by 273 publications
(81 citation statements)
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“…Diagramas utilizados na definição de séries magmáticas do Stock Flores, segundo vários autores. A) Total de álcalis versus sílica (Lameyre, 1987), linha tracejada, delimitando campos alcalinos e subacalino, segundo Miyashiro (1978); B) R1 versus R2 (De La Roche et al,1980); C) Rogers & Greenberg (1981); D) Wright (1969) com abscissas diferenciadas; E) Sylvester (1989); F) Frost et al (2001). (Lameyre, 1987), the dashed line delimiting fields alkali and subalkaline according Miyashiro (1978); B) R1 versus R2 (De La Roche et al, 1980); C) Rogers & Greenberg (1981); D) Wright (1969) with different abscissas; E) Sylvester (1989); F) Frost et al (2001).…”
Section: Discussão Dos Resultadosunclassified
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“…Diagramas utilizados na definição de séries magmáticas do Stock Flores, segundo vários autores. A) Total de álcalis versus sílica (Lameyre, 1987), linha tracejada, delimitando campos alcalinos e subacalino, segundo Miyashiro (1978); B) R1 versus R2 (De La Roche et al,1980); C) Rogers & Greenberg (1981); D) Wright (1969) com abscissas diferenciadas; E) Sylvester (1989); F) Frost et al (2001). (Lameyre, 1987), the dashed line delimiting fields alkali and subalkaline according Miyashiro (1978); B) R1 versus R2 (De La Roche et al, 1980); C) Rogers & Greenberg (1981); D) Wright (1969) with different abscissas; E) Sylvester (1989); F) Frost et al (2001).…”
Section: Discussão Dos Resultadosunclassified
“…9), tanto aqueles que definem trends (TASLameyre, 1987;R1xR2 -De La Roche et al, 1980), quanto os que definem campos (Wright, 1969;Rogers & Greenberg, 1981;Sylvester, 1989;Frost et al, 2001).…”
Section: O Stock Flores No Contexto De Séries Magmáti-cas Ambientes mentioning
confidence: 99%
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“…9. Diagrams of (a) Nb/Y vs. Zr/TiO 2 ⁄0.0001 (Winchester and Floyd, 1977), (b) Ta/Yb vs. Ce/Yb (Pearce, 1982), (c) K 2 O vs. Na 2 O, (d) TAS (Middlemost, 1994), (e) A/CNK vs. A/ NK (Maniar and Piccoli, 1989) and (f) SiO 2 vs. AR (Wright, 1969). Lu, 2012;Zhang et al, 2009).…”
Section: Aplitementioning
confidence: 99%
“…Diagramas utilizados na definição de séries magmáticas, segundo vários autores. (A) total de álcalis versus sílica (Lameyre, 1987); (B) Rogers e Greenberg (1981); (C e D) Wright (1969) com abscissas diferenciadas; (E e F) Frost et al (2001).…”
Section: Definição De Séries Magmáticasunclassified