The Varberg-Torpa Charnockite-Granite Association, SW Sweden: Mineralogy, Petrology, and Fluid Inclusion Chemistry

Petrological and geochemical evolution of the Central Gneissic Belt, Rengali Province, eastern India: Implications for the Neoarchean growth and orogenesis

“…Although there is no fluid inclusion data for the Central Gneissic Belt rocks, we have noted rehydration of orthopyroxene grains in almost all the samples of charnockite gneisses. This, along with the similar geochemical characters and emplacement ages, allows us to consider the evolutionary model proposed by Frost and Frost (2008) and Harlov et al (2013). It is noteworthy that similar charnockite-granite association is common in cratons during their evolutions during the late Archean time (Sheraton and Black, 1988;Moore et al, 1993;Misra et al, 2002;Larin et al, 2006;Feio et al, 2012).…”

“…The evolved counterpart of the suite, i.e. the charnockite-granite association could be explained by the duality of fluid regime by many workers (Frost et al, 2000;Elliot, 2003;Frost and Frost, 2008;Harlov et al, 2013). Spatial and temporal association of charnockite and biotiteor hornblende-rich granite was noted by Elliott (2003 Bohemian Massif (Finger and Clemens, 1995;Klotzli et al, 2001;Finger et al, 2003), Rogaland Igneous Province (Madsen, 1977;Petersen, 1980), Louis Lake Batholith (Frost et al 2000), Planalto granite suite and Amazonian craton (Feio et al, 2012).…”

“…Spatial and temporal association of charnockite and biotiteor hornblende-rich granite was noted by Elliott (2003 Bohemian Massif (Finger and Clemens, 1995;Klotzli et al, 2001;Finger et al, 2003), Rogaland Igneous Province (Madsen, 1977;Petersen, 1980), Louis Lake Batholith (Frost et al 2000), Planalto granite suite and Amazonian craton (Feio et al, 2012). Harlov et al (2013) further envisaged that both the rocks were evolved from a common magmatic source and the effect of later magmatism on charnockite is preserved in textures. Although there is no fluid inclusion data for the Central Gneissic Belt rocks, we have noted rehydration of orthopyroxene grains in almost all the samples of charnockite gneisses.…”

Hallandian 1.45Ga high-temperature metamorphism in Baltica: P–T evolution and SIMS U–Pb zircon ages of aluminous gneisses, SW Sweden

“…2;Christoffel et al, 1999;Söderlund et al, 2002;Möller et al, 2007;Brander et al, 2012). The late-Hallandian evolution recorded in the Eastern Segment demonstrates that the Hallandian orogeny terminated with granite-norite-charnockite magmatism, locally associated with fluid-assisted metamorphism, at 1.42-1.38 Ga (Hubbard, 1975;Åhäll et al, 1997;Christoffel et al, 1999;Andersson et al, 1999;Rimša et al, 2007;Harlov et al, 2006Harlov et al, , 2013Johansson et al, 2013).…”

“…It includes dominantly granite-mangerite-norite-charnockite magmatism and associated, locally fluid-assisted, metamorphism at 1.42-1.38 Ga (Hubbard, 1975;Åhäll et al, 1997;Christoffel et al, 1999;Andersson et al, 1999;Rimša et al, 2007;Harlov et al, 2006Harlov et al, , 2013Johansson et al, 2013). The character of this magmatism points to ponding of mafic magmas at the base of the crust, and could possibly indicate late-Hallandian delamination (cp.…”