Petrochemical Characteristics

Varuna area of Mysuru District, in Dharwar Craton is composed of precambrian dynamic geological settings is prospects of nearly four kinds of litho units with economically viable minerals including gemstones varieties particularly in contact zones of ultramafics, amphibolite schist with gneiss and granitoids. The study carried out by using advent high-tech tools of Spectro-Radiometer (Spectral Evolution SR-3500) instrument, DARWin SP.V.1.3.0 and GIS software’s. Four types of random samples were collected such as gneiss, granitoids, ultramafics and corundum bearing amphibolite schist in the field along with quartzite ridge through GTC (Ground Truth Check). The spectral signatures of the collected samples were derived in a closed laboratory environment to achieve better accuracy. Hyperspectral (350-2500 nm) signatures were developed as the modern technology & 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. Spectro-radiometer instrument provides a high spectral resolution data of 10 nm to bring out diagnostic features on lithological contacts for better discrimination of gemstones bearing litho-units. The present study aims to apply the advent techniques of hyperspectral signature in mapping, exploration of corundum bearing litho units in Varuna area of Mysuru district in Precambrian basement rocks of Karnataka State.

Authors: Maruthi N.E, Basavarajappa H T

Keywords:  Petrochemical Hyperspectral Signature, Corundum, Precambrian rocks, Varuna, Mysuru.

Spectral Evolution is a leading manufacturer of field-portable UV-Vis-NIR remote sensing spectroradiometers and spectrometers for applications including geological remote sensing, ground-truthing, spectral remote sensing, environmental and climate research, crop and soil research, vegetative studies, forestry and canopy studies, radiometric calibration transfer, upwelling and downwelling measurement and more. Our UV-Vis-NIR spectrometers and spectroradiometers provide the best combination of high resolution and high sensitivity resulting in the most precise field portable instruments available on the market.

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