• BASAVARAJAPPA H.T
• MARUTHI N.E

Corundum deposits and occurrences are typically associated with Amphibolite schist in Sullia area. Precambrian basement rocks of Karnataka composed of active and dynamic geological settings with economic mineral deposits and variety of gemstones. These gemstones were noticed all along the lithological contacts of Green stone & Schist Belts, younger granites and granitoids of Dharwar Craton. Corundum is a rock-forming mineral occurs in igneous, metamorphic and sedimentary rocks which represent rich amount of Aluminium oxides (Al2O3) in hexagonal crystal structure. The extreme hardness of corundum makes an excellent abrasive for industrial uses. The study area Sullia comes to Dakshina Kannada District. The district exposes mainly rock types belonging to the Precambrian Peninsular Gneissic Complex (PPGC), schistose rocks of Sargur group and Dharwar super group. Random samples were collected such as gneiss, granitoids, and corundum bearing amphibolite schist through GTC (Ground Truth Check). The study carried out by geological, petrochemical and Hyperspectral signature using advent high-tech tools of Spectro- Radiometer (Spectral Evolution SR-3500) instrument, DARWin SP.V.1.3.0 and GIS software's. The spectral signatures of the collected samples were derived in laboratory environment to achieve better accuracy. Hyperspectral (350-2500nm) were developed as works mainly on physico-chemical and optical properties of the litho units which help in mapping of precious gemstones at lithological contacts and mineralized zones. The present study aims to charactrize the spectral behavior of Corundum and associated rocks. Spectral radiometer instrument bring out diagnostic features on lithological contact for better discrimination of gemstones and altered minerals. The final results highlight the spectral characters of corundum and associated rocks for better mapping in similar terrains of Sullia area of Dakshina Kannada district in Precambrian basement rocks of Karnataka State.

Hyperspectral Signatures, Geochemistry, Corundum, Amphibolite schist, Sullia.

"PETRO – CHEMICAL AND SPECTRAL SIGNATURES ON CORUNDUM BEARING PRECAMBRIAN AMPHIBOLITES IN SULLIA AREA, DAKSHINA KANNADA DISTRICT, KARNATAKA, INDIA.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.75-83, July-2018, Available :http://www.jetir.org/papers/JETIR1807732.pdf

"PETRO – CHEMICAL AND SPECTRAL SIGNATURES ON CORUNDUM BEARING PRECAMBRIAN AMPHIBOLITES IN SULLIA AREA, DAKSHINA KANNADA DISTRICT, KARNATAKA, INDIA.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp75-83, July-2018, Available at : http://www.jetir.org/papers/JETIR1807732.pdf