• Fold interference patterns in Meso-Proterozoic Champaner fold belt (CFB) Gujarat, western India

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      https://www.ias.ac.in/article/fulltext/jess/128/03/0048

    • Keywords

       

      Champaner Fold Belt (CFB); Narukot; interference fold pattern; hook shaped; dome and basin.

    • Abstract

       

      This paper documents three phases of folding within the Meso-Proterozoic Champaner Fold Belt (CFB) located at the eastern part of Gujarat, western India. The first phase (F$_{1}$) displays WNW plunging F$_{1}$ fold of moderately inclined nature in the schists of the Khandia Formation. The second phase (F$_{2}$) refolded F$_{1}$ along a similar trend to produce folds of tight isoclinal nature in the Khandia and Narukot quartzites. Additionally, these F$_{1}$ folds depict second-order tight, and F$_{2}$ folds as first-order open type in the younger sequences of the CFB with varying amplitude vs. wavelength ratio. The ratio for F$_{1}$ folds ranges from 2:1 to 3:1, obtained along 3–4 m length across 3–6 m$^{2}$ area, whereas for F$_{2}$ folds the ratio ranges from 1:4 to 1:5 and is obtained along 1–2.5 km length across 0.5–1.5 km$^{2}$ area. The fold interference pattern developed on account of F$_{1}$ and F$_{2 }$ folds has resulted into Type-III or hook-shaped geometry regionally. The last phase of folding is characterised by N–S trending F$_{3}$ folds of open type over kilometre long limbs of F$_{1}$ and F$_{2}$ folds. The superposition of F$_{1-3}$ folds developed map scale Type-I or Dome and Basin geometry over Type-III superposed folds. The overall compressional direction for F$_{1}$ and F$_{2}$ folds ranges from N–S to NNE–SSW and for F$_{3}$ ranges from E–W to ESE–WNW.

    • Author Affiliations

       

      Aditya U Joshi1

      1. Department of Geology, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat 390 002, India.
    • Dates

       
  • Journal of Earth System Science | News

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