Deformation behavior of migmatites: insights from microstructural analysis of a garnet–sillimanite–mullite–quartz–feldspar-bearing anatectic migmatite at Rampura–Agucha, Aravalli–Delhi Fold Belt, NW India

Abstract

This is a repository copy of Deformation behavior of migmatites: insights from microstructural analysis of a garnet-sillimanite-mullite-quartz-feldspar-bearing anatectic migmatite at Rampura-Agucha, Aravalli-Delhi Fold Belt, NW India.

Deformation Behavior and Inferred Seismic Properties of Tonalitic Migmatites at the Time of Pre‐melting, Partial Melting, and Post‐Solidification

“…Miranda and Klepeis (2016) indicate that lower crust rocks that have previously undergone partial melting and melt solidification may deform by solid‐state dislocation creep during further deformation events. In contrast, microstructural analysis of migmatites during a single deformation event only develop weak post‐crystallization and solid‐state deformation characteristics in the “crystallized melt” portion of the rock (Prakash et al., 2018). Consequently, in the latter case the protolith (or residuum in this case study) takes up most of strain‐related deformation (Franěk et al., 2011; Vanderhaeghe, 2009).…”

The use of heavy mineral chemistry in reconstructing provenance: A case study from Mesozoic sandstones of Kutch Basin, India

“…The majority of the Mesozoic garnets of Kutch indicating granulite facies source resemble those of the Delhi Supergroup (Figures 4c, 5c). At the same time, a few of these granulite facies garnets are similar to those of the Banded Gneissic Complex and the Aravalli Supergroup (Bhowmik et al, 2010; Bhowmik et al, 2018; Prakash et al, 2018; Roy et al, 2005). The Mesozoic garnets, bearing amphibolite facies source signatures, are similar to those in rocks of the Aravalli Supergroup (Bhowmik et al, 2010; Lal et al, 1976; Prakash et al, 2018; Roy et al, 2005) (Figure 4c) and the Banded Gneissic Complex (Figure 5c).…”

“…At the same time, a few of these granulite facies garnets are similar to those of the Banded Gneissic Complex and the Aravalli Supergroup (Bhowmik et al, 2010; Bhowmik et al, 2018; Prakash et al, 2018; Roy et al, 2005). The Mesozoic garnets, bearing amphibolite facies source signatures, are similar to those in rocks of the Aravalli Supergroup (Bhowmik et al, 2010; Lal et al, 1976; Prakash et al, 2018; Roy et al, 2005) (Figure 4c) and the Banded Gneissic Complex (Figure 5c). A few garnets, bearing amphibolite facies signatures in the Jhumara and Jhuran formations, resemble those of the Sirohi Granite (Arora, Pant, et al, 2017).…”

“…Transparency of symbols increased to avoid overlap of data points and to highlight compositional fields. Data sources: BGC—Sharma & MacRae, 1981, Dasgupta, Guha, Sengupta, Miura, & Ehl, 1997; ASG—Lal, Nagpaul, & Sharma, 1976, Roy, Kröner, Bhattachaya, & Rathore, 2005, Bhowmik, Bernhardt, & Dasgupta, 2010, Prakash et al, 2018; DSG—Bhowmik, Dasgupta, Baruah, & Kalita, 2018; SG—Arora, Pant, Sharma, & Sadiq, 2017 [Colour figure can be viewed at wileyonlinelibrary.com]…”

“…Transparency of symbols increased to avoid overlap of data points and to highlight the compositional fields. Data sources: BGC- Sharma & MacRae, 1981, Dasgupta et al, 1997ASG-Lal et al, 1976, Roy et al, 2005, Bhowmik et al, 2010, Prakash et al, 2018DSG-Bhowmik et al, 2018;SG-Arora, Pant, et al, 2017 [Colour figure can be viewed at wileyonlinelibrary.com] than 10% in the Bi variety occurring in intermediate-acidic granitoids;…”