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      https://www.ias.ac.in/article/fulltext/jess/099/04/0515-0547

    • Keywords

       

      Magnetics; geoexploration; magnetic anomaly; approximation techniques; anomaly inversion; modelling; linear inversion; coastal magnetic anomaly; Midcontinent Rift; New York-Alabama lineament; New Madrid rift complex; mapping in Precambrian shield; placer magnetic anomaly

    • Abstract

       

      The magnetic method is the oldest and one of the most widely used geophysical techniques for exploring the earth’s subsurface. It is a relatively easy and inexpensive tool to employ, being applicable to a wide variety of subsurface exploration problems involving horizontal magnetic property variations occurring from near the base of the crust to within the uppermost meter of soil. Successful applications of the magnetic method require an in-depth understanding of its basic principles and careful field work, data reduction, and interpretation. Commonly, interpretations are limited to qualitative approaches which simply map the spatial location of anomalous subsurface conditions, but under favourable circumstances the technological status of the method will permit more quantitative interpretations involving specification of the nature of the anomalous sources. No other geophysical method provides critical input to such a wide variety of problems. However, seldom does the magnetic method provide the complete answer to an investigation problem. As a result, it is generally used in concert with other geophysical and geological data to limit its interpretational ambiguities.

    • Author Affiliations

       

      William J Hinze1 Ralph R B Von Frese1 2

      1. Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana - 47907, USA
      2. Department of Geology and Mineralogy, The Ohio State University, Columbus, Ohio - 43210, USA
    • Dates

       
  • Journal of Earth System Science | News

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