• Development of micro-scale joints in volcanic rocks under thermal stress

    • Fulltext


        Click here to view fulltext PDF

      Permanent link:

    • Keywords


      Tensile stress; jointing; crack propagation; cooling rate

    • Abstract


      Petrographic studies of samples of the Rajmahal basalt reveal a variety of microscopic joints within phenocrysts, which seem to have developed under the influence of thermal stresses during cooling. The theoretical analysis shows that:


      In order to understand the effects of cooling rate on the mode of jointing, analogue model experiments were performed by quenching melt films of organic, crystalline materials under varying cooling conditions. In experiments, non-branching linear joints developed at relatively lower rates of cooling by a process of sub-critical crack propagation. On the other hand, at higher rates of cooling the mechanism of crack propagation was essentially supercritical leading to the development of branching joints.

    • Author Affiliations


      Susanta Kumar Samanta1

      1. Department of Geological Sciences, Jadavpur University, Calcutta - 700 032, India
    • Dates

  • 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.