Abstract
Comparison of the Meso-Neoarchean crustal evolution of the Bundelkhand, Aravalli, Western and Eastern Dharwar Cratons shows that geodynamic mechanisms, similar to modern plate-tectonic and mantle-plume mechanisms, were active in that period. The Mesoarchean crustal evolution of the Bundelkhand Craton is considerably different from that of other cratons discussed here in that it comprises subduction-accretion processes, while in other cratons plume processes were more active in this period. In the Neoarchean (2.7-2.5 Ga), all the cratons display subduction-accretion processes. Each of the cratons displays its own crust formation pattern. It seems that in Mesoarchean time the Bundelkhand, Aravalli and Western and Eastern Dharwar Cratons were parts of the Kenorland Supercontinent, rather than one block.
Highlights
Archean rocks in the Indian Shield are exposed in the Bundelkhand and Aravalli Cratons to the north and in the Dharwar (Western and Eastern), Singhbum and Bastar Cratons to the south, respectively, as far as the E-W trending Central Indian tectonic zone (Fig. 1) [Naqvi and Rogers, 1987; Ramakrishnan and Vaidyanadhan, 2010; Roy and Purohit, 2018]
It should be noted that the Bundelkhand and Aravalli Cratons are much smaller than the Western and Eastern Dharwar Cratons (Figs. 1 and 2) they comprise TTG, greenstone/ schist and granitoids complexes which are the most typical of Archean cratons
The Western Dharwar Craton is dominated by 3.36–3.2 Ga TTG, but they had probably comprised even older constituents, which have survived only as detrital zircons in sedimentary rocks
Summary
Archean rocks in the Indian Shield are exposed in the Bundelkhand and Aravalli Cratons to the north and in the Dharwar (Western and Eastern), Singhbum and Bastar Cratons to the south, respectively, as far as the E-W trending Central Indian tectonic zone (Fig. 1) [Naqvi and Rogers, 1987; Ramakrishnan and Vaidyanadhan, 2010; Roy and Purohit, 2018]. Tonalite-trondhjemite-granodiorite (TTG), supracrustal (greenstone and schist), granitoids and other typical Archean complexes were identified in the Bundelkhand and Aravalli Cratons in the recent studies [Singh and Slabunov, 2013, 2015a, b, 2016; Kaur et al, 2014, 2019; Verma et al, 2016; Saha et al, 2016; Slabunov et al, 2017a; Slabunov and Singh, 2019a; Singh et al, 2019a, b, 2020; Nasipuri et al, 2019]. The aim of the present paper is to resume earlier works [Slabunov, 2013; Slabunov and Singh, 2018, 2019a, b] through comparative analysis of the Archean crustal evolution of the Bundelkhand Craton and other structures of this type globally
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