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Sphene bearing gneisses of Madhugiri area, Karnataka State, India

  • M. S. Sadashivaiah
  • R. S. Hanagodimath
Article
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Abstract

Sphene fleck granitic rocks (Titanitflecken-gesteine) composed of biotite and migmatitic gneisses are frequently found in the granitic terrain between Madhugiri and Koratagere. The detailed field and thin section studies of these rocks indicate that sphene is formed during the migmatization and feldspathization of the amphibolites, which has resulted in the recrystallization of plagioclase and in the breakdown of hornblende and biotite. The released lime, titania and iron have resulted in the formation of sphene, seen in the gneissic rocks as trains, patches and discrete crystals. Mineralogical, petrological and petrochemical evidences are given in support of the above conclusion.

Keywords

Apatite Thin Section Granitic Rock Country Rock Pale Yellow 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Indian Academy of Sciences 1977

Authors and Affiliations

  • M. S. Sadashivaiah
    • 1
  • R. S. Hanagodimath
    • 1
  1. 1.Department of GeologyKarnatak UniversityDharwar

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