R8: 変成岩とテクトニクス

[R8-07] U-Pb zircon geochronology of pre- to post-tectonic granite emplacement across the South Delhi Fold belt, India: Implication towards the age of transpressive orogeny

*Kaushik Das¹, Kalyanbrata Hatui², Anupam Chattopadhyay², Hikaru Sato¹ (1. Hiroshima University, Science, 2. University of Delhi)

キーワード：Pre- to post-tectonic granite, South Delhi Fold Belt, U-Pb zircon age, Age for transpression

The South Delhi Fold Belt, a part of the Aravalli-Delhi Orogenic Belt in NW India preserves spectacular meso- to microscopic evidence of poly-phase folding deformation leading to a regional "positive flower structure". We report the regional-scale variation of fold structure to characterize this transpressive orogeny and different pulses of granite emplacement. U-Pb zircon age provides us to bracket the timing between ca. 995 Ma and ca. 850 Ma for this oblique collision.