CorrespondenceIncipient charnockitisation triggered by structurally-controlled CO2 influx in central Madagascar and magnetic implications
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Cited by (11)
Charnockites: Petrologic and phase equilibria characterization of some global examples
2023, Geosystems and GeoenvironmentPetrogenesis of incipient charnockite in the Ikalamavony sub-domain, south-central Madagascar: New insights from phase equilibrium modeling
2017, LithosCitation 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 ResearchCitation 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 SciencesCitation 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.
Seismogenesis of the lower crustal intraplate earthquakes occurring in Kachchh, Gujarat, India
2011, Journal of Asian Earth Sciences