Integrated Studies of the Elastic Properties of Some Indian Rocks

  1. Leon Knopoff,
  2. Charles L. Drake and
  3. Pembroke J. Hart
  1. S. Balakrishna and
  2. Y. V. Ramana

Published Online: 18 MAR 2013

DOI: 10.1029/GM012p0489

The Crust and Upper Mantle of the Pacific Area

The Crust and Upper Mantle of the Pacific Area

How to Cite

Balakrishna, S. and Ramana, Y. V. (2013) Integrated Studies of the Elastic Properties of Some Indian Rocks, in The Crust and Upper Mantle of the Pacific Area (eds L. Knopoff, C. L. Drake and P. J. Hart), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM012p0489

Author Information

  1. National Geophysical Research Institute, Hyderabad, India

Publication History

  1. Published Online: 18 MAR 2013
  2. Published Print: 20 APR 2012

Book Series:

  1. Geophysical Monograph Series

Book Series Editors:

  1. Waldo E. Smith

ISBN Information

Print ISBN: 9780875900124

Online ISBN: 9781118663738

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Keywords:

  • Elastic properties;
  • Elastic wave velocities;
  • Indian rocks;
  • Laboratory and field velocity;
  • P-wave velocities;
  • Seismic velocities;
  • Ultrasonic velocities in rocks;
  • Uniaxial stress

Summary

The velocities of compressional and transverse waves determined by the measurement of travel time of pulses in specimens of rocks at atmospheric pressure and room temperature are presented. Specimens include various types of rocks taken from typical areas in different parts of India. Measurements on most of the rock samples, mainly igneous and metamorphic, were taken in three mutually perpendicular directions. The present paper gives experimental details, modal analysis, and numerical tables of velocity as a function of direction of propagation, density, porosity, mineral composition, and petrogenetic history. The variation of ultrasonic velocities in rocks with unidirectional compression and their consequent effects are studied in detail. An attempt is made to present recent experimental data and to study the scatter in velocity values. Salient results of laboratory and field investigation and the effect of frequency on the attenuation in rocks are also presented.