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      https://www.ias.ac.in/article/fulltext/jess/126/06/0090

    • Keywords

       

      Sindreth Basin; continental setting; basin evolution; NW India; Malani Igneous Suite.

    • Abstract

       

      The Neoproterozoic Sindreth Basin, NW India, and its surrounding area represent a half graben structure situated between the undeformed Malani Igneous Suite (MIS) in the west and a corridor of coeval Cryogenian ductile deformation, anatexis and granite intrusion in the east. The main lithologies observed in the basin are conglomerate, fanglomerate, debris flow and lake deposits derived from a nearby continental provenance, intercalated with concurrent mafic and felsic lava flows. Based on geological traverses across the strike of the basin, we propose a three-fold classification comprising Lower Clastic Unit and an Upper Clastic Unit and a Bimodal (basalt–rhyolite) Volcanic Unit separating the two. Tilting due to basin inversion and faulting has been observed; however, the rocks are unmetamorphosed and show undisturbed primary sedimentary features. The stratigraphic record of the basin is characteristic for deposition and magmatism in a fault-related continental setting. Implications of the findings have been discussed in the context of Neoproterozoic crustal dynamics in NW India. This study provides conclusive evidence for a continental setting for Sindreth Basin evolution and contests the recent models of active subduction setting (either back-arc basin or accretionary sediments over a subduction zone).

    • Author Affiliations

       

      Stefan Schöbel1 2 Kamal K Sharma3 Thorsten Hörbrand1 Theresa Böhm1 Ines Donhauser1 Helga de Wall1

      1. Geozentrum Nordbayern, Universit¨at Erlangen-N¨urnberg, Schlossgarten 5, D-91054 Erlangen, Germany.
      2. Present address: Geozentrum Hannover, German Federal Institute for Geosciences and Natural Resources, Stilleweg 2, D-30655 Hannover, Germany.
      3. Department of Geology, Government Postgraduate College, Sirohi 307 001, India.
    • Dates

       
  • Journal of Earth System Science | News

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