Elsevier

Gondwana Research

Volume 11, Issue 4, June 2007, Pages 584-585
Gondwana Research

Correspondence
Incipient charnockitisation triggered by structurally-controlled CO2 influx in central Madagascar and magnetic implications

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Cited by (11)

  • Petrogenesis of incipient charnockite in the Ikalamavony sub-domain, south-central Madagascar: New insights from phase equilibrium modeling

    2017, Lithos
    Citation Excerpt :

    The rocks in southern Madagascar underwent two granulite-facies metamorphic events; the first event at > 600 Ma was overprinted by the second granulite (locally ultrahigh-temperature) event during the Late Neoproterozoic to Early Cambrian (560 and 530 Ma), although the Vohibory Domain was not affected by the second event (Andriamarofahatra et al., 1990; Jöns and Schenk, 2011; Kröner et al., 1996; Montel et al., 1996; Nicollet et al., 1997; Paquette et al., 1994). Incipient charnockite was first reported from Madagascar by Rakotondrazafy et al. (2007) from the area northwest from Antananarivo in the Antananarivo Block, central Madagascar. They described patches of dark incipient charnockites (plagioclase + K-feldspar + quartz + orthopyroxene) within migmatitic gneiss (plagioclase + K-feldspar + quartz + biotite) and dominant CO2-rich fluid inclusions within plagioclase in the charnockite.

  • Incipient charnockite: Characterization at the type localities

    2014, Precambrian Research
    Citation Excerpt :

    Localized charnockitic alteration of amphibole–biotite gneiss is now known to be a relatively common feature of transitional amphibolite facies–granulite facies terranes worldwide. Apparently similar occurrences have been reported from Southern Granulite Terrane in India (e.g., Yoshida and Santosh, 1994), Sri Lanka (e.g., Hansen et al., 1987; Milisenda et al., 1991), Madagascar (Rakotondrazafy et al., 2007; Nédélec et al., 2014), SW Greenland (McGregor and Friend, 1992), the Lake Baikal region of Siberia (Hopgood and Bowes, 1990), North China Block (Yang et al., 2014), and the Limpopo Belt of South Africa (Van Reenen et al., 1988). All of these occurrences are Archean except for Lake Baikal, North China (Paleoproterozoic) and Sri Lanka (Neoproterozoic-Cambrian).

  • Incipient charnockitisation due to carbonic fluid transfer related to late Pan-African transcurrent tectonics in Madagascar; implications for mobility of Fe, Ti, REE and other elements

    2014, Journal of African Earth Sciences
    Citation Excerpt :

    Despite some contamination by small including silicates, the calcite appears to contain a few percents manganese and iron. Charnockites correspond to much higher susceptibility magnitudes than granites, as already pointed by the preliminary work of Rakotondrazafy et al. (2007). The present study confirms this observation using a larger number of samples.

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