• SATADRU BHATTACHARYA

      Articles written in Journal of Earth System Science

    • The role of pre-existing faults and fractures in shaping polygonal impact craters and its tectonic implications in the southern Margaritifer Terra region, Mars

      SUPRATIK BASU NILANJAN DASGUPTA ABHIK KUNDU SATADRU BHATTACHARYA DIPAYAN DASGUPTA

      More Details Abstract Fulltext PDF

      The presence of polygonal-shaped craters, i.e., craters with complete or incomplete polygonal rims along with circular or elliptical outlines, on the surface of celestial bodies has been known for nearly a century. However, many investigations on their distribution and formation have not been carried out, until recently. Scientists have proposed that the polygonal shapes of the crater rims owe their origin to the preexisting structurally weak planes like faults/fractures in the area adjacent to the impact. The present study area is the southern part of Margaritifer Terra, Mars; a mid-Noachian terrain, which has craters of different morphologies, including the polygonal impact craters (PICs). The study focuses on the reason for the development of PICs by identification and mapping of a population of 50 selected polygonal craters along with morphotectonic features namely grabens, wrinkle ridges, and lobate scarps. The analysis of orientations of the straight segments of polygonal crater rims shows marked resemblance with orientations of these morphotectonic features conforming to their control on the rim geometries.

      $\bf{Highlights}$

      ${\bullet}$ Structural mapping of the southern Margaritifer Terra region, Mars.

      ${\bullet}$ Generating rose diagrams and line graphs for the orientation of the straight edges of polygonal craters and the morphotectonic features within the southern Margaritifer Terra region.

      ${\bullet}$ Conducting statistical F-test to find out the bearing of weak planes on the formation of PICs.

      ${\bullet}$ Finding out the presence of buried weak planes by comparing the rose diagrams and spike graphs.

  • Journal of Earth System Science | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.