Physical, Acoustic and Elastic Properties of Submarine Basalts from Bombay Harbour Area, West Coast of India


  • L. V. Subba Raju
  • B. Ramalingeswara Rao
  • S. M. Karisiddaiah
  • Y. V. Ramana


Submarine basalts, Bombay harbour, physical, acoustic and elastic properties, cracks, coastal activities


Physical, acoustic and elastic properties were determined for submarine basalts from the Elephants islands, Bombay harbour area. Sample densities ranged from 2.39 to 2.98 Mg· m-3, while sound wave velocities showed a scatter of 3.39 to 6.80 km · sec-1 and 1.74 to 4.42 km · sec-1 for longitudinal and transverse waves, respectively. These properties are broadly compatible with the continental basalts of India as well as other parts of the world. Evaluation of analytical results, based on individual least squares solutions amongst various properties and observed property variations, indicates differences in porosity, seawater alteration, and lithological and compositional changes. The significance of the curvilinear relationship between the number of cracks and the longitudinal wave velocity in the specimens is related to coastal and harbour developmental activities.