• Mixed siliciclastic–carbonate debrite–turbidite deposits in Paleoproterozoic Aravalli Supergroup, Zawar, Rajasthan, India: Implications on the Aravalli Basin evolution

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    • Keywords

       

      Mixed siliciclastic–carbonate deposit; turbidite; debrite; sediment density Cow; sea-level highstand; rift basin.

    • Abstract

       

      The Paleoproterozoic Aravalli Supergroup exposed in the Zawar Pb–Zn mineralized belt of Rajasthan, India contains a mixed siliciclastic–carbonate horizon (Mochia Formation), which hosts the mineralization. The mixed sediments are underlain by a siliciclastic turbidite unit (Mandli Formation) and overlain unconformably by a fluvio-deltaic- to storm-influenced siliciclastic platformal deposit (Bowa Formation). Detailed facies analysis of the mixed siliciclastic–carbonate succession reveals that the sediments were deposited in a slope-base to basin plane environment by sediment density flow processes. Petrography of the siliciclastic–carbonate sediments reveals that micritic carbonates dominate over siliciclastic components in the compositionally mixed layers. The preponderance of micritic carbonate over siliciclastics indicates the sediments were sourced by an adjacent platform during a sea-level highstand. The sedimentation pattern in the Zawar section of the Aravalli Basin was primarily controlled by the change in sea level under the influences of syn-sedimentary tectonics. The study further reveals the implication of the sedimentary succession of the Zawar section in the stratigraphy of the Aravalli Basin.

    • Author Affiliations

       

      AMRITA MUKHERJEE1 H N BHATTACHARYA1

      1. Techno India University, West Bengal, Sector V, Salt Lake, Kolkata 700 091, India.
    • Dates

       
  • Journal of Earth System Science | News

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