Mineral Resources Potential - Geothermal Resources

, suggesting either- .prefeferftiti~
most important in the Adda gold field. Dcluvial gold is known to
!' occur on the hillsides of the Legadembi and S&m primary gold
deposits and the Kumudu ore occurrence. In the Adola goldfield,
placer deposits with contents averaging 0.1& or more of gold
and with gold reserves of over 30 kg are classifid as "placer
deposit", while those with lesser gold valws and reserves erre
a termed 'bplacex occurrence". All gold placers are concentrated in
the N-S hending Megado Belt. The economic gold con&ntratim
of the placers occur in gravel, shd, silt and clay sediments of dry
streams, river fl-, old vdIeys, and terraces. They are derived
- from the primary gold deposits (orogenic mesothermal v-, lodedeposits),
and gold-bearing quartzite's associated-with the
rocks of the Adola Group and the conglomerates of the Kajimiti
Beds, that are often confined to Pan-African Shear-Zones and
Fdts.
The largest gold placer deposit has been explored in the
Bore valley with calculated reserves of up to 4.5 tons of gold
(EMRDC, 1 985; $elas;sie and Reimold, 2000). This placer bas been
mined since the late 1950s and its gold production is still in
progress by misd miners. In the Adola area, a total reserve of
13.67 toas of placer gold was @mated in 1985 (EMRDC, 1985;
Selassie and ReimoId, 2000). Other placer gold are mined in a
small scale in Wollega, Akobo 4 Tigray region by local people.
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