The present study is an integrated approach consisting of field observations, petrography, rock magnetism and Anisotropy of Magnetic Susceptibility (AMS) measurements which are used to determine the magneto-mineralogical characteristics and the nature of the magnetic fabrics of the high grade rocks from the Chilka Lake Area, Eastern Ghats Belts, India. Petrographic study reveals the textural relationship of the magnetic minerals with that of the silicates. The study of the thin-polished sections under reflected light microscope depicted the presence of magnetite, titano-magnetite and ilmenite as the dominant magnetic minerals. More than one generation of these minerals was found in these sections corresponding to different conditions of temperature that prevailed during their oxidation. The different generations of the magnetic minerals have significant tectonic results and points towards crustal upliftment. IRM and hysteresis curves were obtained which show the presence of both the ferromagnetic and paramagnetic minerals. Further, the determination of the Curie temperature confirmed the presence of magnetite and haematite. However, haematite was not observed in the petrographic/ore-petrographic studies. AMS studies unravelled the overall nature of the magnetic fabrics in the region. The susceptibility ellipsoids were dominantly oblate in the region as evident from the F-L and the P j -T j plots. The magnetic foliation plane has a highly variable strike varying from NE-SW to NW-SE with a moderate amount of dip. The magnetic lineation, i.e. the maximum susceptibility axes (K 1 ) showed clusters in the NE, SW and the NW quadrants having close accordance with that of the F 3 and F 4 fold axes pointing towards the structural controls of the magnetic fabrics.
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