India-Antarctica-Australia-Laurentia connection in the Paleoproterozoic-Mesoproterozoic revisited: Evidence from new zircon U-Pb and monazite chemical age data from the Eastern Ghats Belt, India

Tectonothermal evolution of the Banded Gneissic Complex in central Rajasthan, NW India: Present status and correlation

“…3e). The globally significant tectonothermal event during the period $1.76-1.6 Ga (cited in Bhowmik et al (in press), Dharma Rao et al (2011a,b), Bose et al (2011) and Santosh (in press) is usually correlated with accretionary growth of Columbia (Zhao et al, 2003(Zhao et al, , 2004Santosh, 2002, 2009;Santosh et al, 2009;Santosh, 2010).…”

“…This is indeed an attractive proposition, as evidence of accretion/subduction at 1.9-1.8 Ga is otherwise very rare in the Indian subcontinent (Vijaya Kumar et al, 2010;Dharma Rao et al, 2011b;Bose et al, 2011;Naganjaneyulu and Santosh, in press), unlike that, for example, in north China craton (Zhao, 2001;Santosh, 2010;Santosh et al, in press;Tsunogae et al, 2011;Zhai and Santosh, 2011). The record of tectonothermal and tectonomagmatic event of this age in the BGC-II is preserved in 1.84-1.82 Ga magmatic and metamorphic zircon and monazite grains as detrital components in the metasediments of the SMC and MMC (Buick et al, 2006(Buick et al, , 2010, emplacement of calc-alkaline plutons in the North Delhi Fold Belt (Kaur et al, 2009), and magmatism in the Anasagar granite gneiss (Mukhopadhyay et al, 2000) (Table 1).…”

Australia and Nuna

“…The timing of the break-up is poorly constrained, but ultra-high-temperature metamorphism in the Eastern Ghats Granulite Terrane at c. 1760 and 1600 Ma (Bose et al 2011) may indicate the lower crustal expression of extension, leading to the separation of Australia and India, with the implication of a post-1600 Ma break-up (Fig. 15c).…”

Significance of post‐peak metamorphic reaction microstructures in the ultrahigh temperature Eastern Ghats Province, India

“…counter‐clockwise—in different parts of the province derived using a variety of different thermobarometric methods (e.g. Mukhopadhyay & Basak, ); and (2) difficulties in interpreting the geological significance of U–Pb age data that span a range from the mid to late Mesoproterozoic to the early Neoproterozoic (Bose, Dunkley, Dasgupta, Das, & Arima, ; Das, Bose, Karmakar, Dunkley, & Dasgupta, ; Korhonen, Clark, Brown, Bhattacharya, & Taylor, ; Korhonen, Saw, Clark, Brown, & Bhattacharya, ; Mezger & Cosca, ; Shaw et al., ; Simmat & Raith, ), as well as an enigmatic late Neoproterozoic to Cambrian overprint (Dobmeier & Raith, ; Simmat & Raith, ). However, a survey of the mineral reaction microstructures presented in the wealth of existing literature on the EGP (Table , discussed further below) strongly suggests that throughout the province the P–T record is characterized by an apparently early up‐pressure and/or near‐isobaric cooling history (so‐called M1), apparently followed by a near‐isothermal down‐pressure and/or down‐pressure–cooling history (so‐called M2) (e.g.…”