Lithological Mapping of Kimberlite Clan of Rocks Using Airborne Hyperspectral AVIRIS Data in Eastern Dharwar Craton, India

Spectrometer (AVIRIS) and Advanced Spaceborne Thermal
Emission and Reflection Radiometer (ASTER) datasets to delineate
new kimberlite locations. The objective of this work is to map and
locate new kimberlite formations. We applied two classification
algorithms, Matched Filtering and Adaptive Coherence Estimator
(MF and ACE). The pure spectra from the known kimberlite bodies
on the Bhukosh GSI map were used as a reference to map and locate
unknown kimberlite bodies. New circular anomalies were found in
the image that were similar to the known bodies. SAM classification
was performed to map the associated minerals in the image and
validate these unknown kimberlite bodies. The unknown bodies'
spectral absorption characteristics matched the known kimberlites'
pure spectra in the SWIR range. Further, lineaments in the study area
were delineated using the two datasets, AVIRIS and ASTER, to find
their association with kimberlites.