Map India 2005 Geomatics 2005

schists are occasionally observed in close proximity with the mineralisation. The
petrographic studies of the host rocks clearly indicate the occurrence of corundum with
quartzo felspathic rocks. However, corundum is not found with in amphibolitesCorundum
is observed in colluvium particularly along the meander points of the drainage pattern in
the Lakshmipuram area forms both float and placer concentrations. In addition to the
micro level geological exploration, petrology, mineralogy and geochemistry can give rise
to invaluable information on Corundum, Ruby and Garnet minerals.
As there is no direct evidence as to the source rock for corundum in the area, it
could be presumed that corundum could have formed due to the desilication of quartz
and alumina rich rocks traversed by ultrabasic/ultramafic rocks.
From the studies it is concluded that:
1. Precious and semi precious variety corundum is significantly
mineralised in Lakshmipuram area and also concealed under soil
cover.
2. Lithology, structure and geomorphology controls and concentrate
mineralisation.
3. Remote sensing studies facilitated to delineate the favourable
extended zones of mineralisation.
4. To explore full potential of mineralisation and the nature of
intrusives and their metamorphic history it is imperative to initiate
a detailed petrological and structural investigations
5. A comprehensive geoscientific evaluation is a necessity to
identify the richness of the deposits.
Acknowledgements
The authors thank Dr. V. Diwakar Rao and Dr. M.N. Reddy of geology Dept.
Osmania University for their useful discussions during the preparation of this paper. The
help and cooperation received from Dr. K. Paninder Rao of State Ground water
department and Sri Narahari of Geological survey of India, Hyderabad is gratefully
acknowledged.
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