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Magnetic properties of mafics and ultramafics from Eastern Ghats

  • V Bhaskara Rao
  • A Lakshmipati Raju
Article
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Abstract

Magnetic properties, namely intensity of natural remanent magnetisation (NRM) and magnetic susceptibility, of mafic and ultramafic formations of Eastern Ghats belt in the Godavari Districts, Andhra Pradesh are studied. The formations sampled for the study are, iron-ore, chromite-ore, amphibolite, gabbro, charnockite and khondalite gneiss. Mineralogical differences in iron-ore and the degree of martitisation are reflected in magnetic susceptibility. NRM and susceptibility of chromite-ore are feeble. The gabbro exhibits strong magnetic properties because of its contiguity with iron formation. The Koenigsberger ratio is found to indicate relative palaeomagnetic stability.

Keywords

Natural remanent magnetisation susceptibility Koenigsberger ratio volume percent magnetite palaeomagnetic stability mafics and ultramafics 

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Copyright information

© Indian Academy of Sciences 1981

Authors and Affiliations

  • V Bhaskara Rao
    • 1
  • A Lakshmipati Raju
    • 1
  1. 1.Department of GeophysicsAndhra UniversityWaltairIndia

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