Map India 2005 Geomatics 2005

The haphazard exploitation activity of corundum by the local entrepreneurs along
certain faiths and beliefs, is going on in this area over a considerable period of time. The
state authorities have investigated these areas where exploitation has been done and
reported in their annual technical reports (DMG 2001-2002). Some of the previous
contributions from the geologists who have studied this area, which is a part of
Khammam Schist Belt, on the geology and petrogenetic evolution as it occupies pivotal
position among the various litho units of the schist belts in the eastern Dharwar craton
include (Balakrishna & Subbaraju (1976), Sarvothaman H. (2001), Leelanandam &
Narsimha reddy (1985), Ramakrishnan.M etal (1998), Ramam&Murthy (1997). The
geology of corundum occurrences have been a subject of considerable economic
importance and many workers in recent times have contributed on this subject
(Chandrasekhar, H and Nazeer Ahmed (1994), Devaraju, T.K. and Alikhan, M.A., (1981),
Gandhi Prasad et.al. (1984), Panjikar et.al (1985), Rama Rao B. (1962), Ravindra
et.al.(1990) Viswanatha M.N. (1972), Dayasankar et al.(2001) Narayan Sangam(2002)
Narayan Sangam & Pavanaguru(2002). Narayan Sangam(2004)
The area of investigation poses several complexities with respect to its geology,
structure and tectonics in view of the nature and controls of corundum mineralisation. As
no comprehensive work on with regards to its petrogenesis and mineralisation has been
done in the past, systematic investigations were attempted using the techniques of
Remote sensing and GIS. Integrated remote sensing methods, incorporating distinct
themes have been emphasized to facilitate the identification of zones of mineralisation of
corundum in this area.
Data Used:
Remote sensing studies using IRS 1C/1D LISS III Geocoded FCC image dated
Feb. 99 has been utilized and interpreted and different overlays of information
concerning geology, structure, geomorphology, drainage has been synthesized to arrive
at a meaningful solutions. SOI Toposheets(65c/7&65c/8) and Geological map(GSI) were
also utilized for this study.
Geology of the area
The Lakshmipuram area is a part of the Khammam schist belt. It is situated along
the northern continuity of the Nellore schist belt, south of river Godavari. The Geological
2