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      https://www.ias.ac.in/article/fulltext/jess/125/04/0873-0884

    • Keywords

       

      Almora crystalline zone; Lesser Himalaya, back-thrusting; AMS

    • Abstract

       

      The present study aims to understand evolution of the Lesser Himalaya, which consists of (meta) sedimentaryand crystalline rocks. Field studies, microscopic and rock magnetic investigations have beencarried out on the rocks near the South Almora Thrust (SAT) and the North Almora Thrust (NAT),which separates the Almora Crystalline Zone (ACZ) from the Lesser Himalayan sequences (LHS). Theresults show that along the South Almora Thrust, the deformation is persistent; however, near theNAT deformation pattern is complex and implies overprinting of original shear sense by a youngerdeformational event. We attribute this overprinting to late stage back-thrusting along NAT, active afterthe emplacement of ACZ. During this late stage back-thrusting, rocks of the ACZ and LHS were coupled.Back-thrusts originated below the Lesser Himalayan rocks, probably from the Main Boundary Thrust,and propagated across the sedimentary and crystalline rocks. This study provides new results frommultiple investigations, and enhances our understanding of the evolution of the ACZ.

    • Author Affiliations

       

      Amar Agarwal1 K K K K Agarwal2 R Bali2 Chandra Prakash2 Gaurav Joshi2

      1. Laboratorio de Paleomagnetismo, Instituto de Geofisica, UNAM, Mexico City, Mexico.
      2. Centre of Advanced Study in Geology, University of Lucknow, Lucknow, India.
    • Dates

       
    • Supplementary Material

       
  • Journal of Earth System Science | News

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