Mineral Resources Potential - Geothermal Resources

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158 Mineral Remums Fbtential of Ethiopis
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t~gure ;?o A large out-crop of dolomrt~c marble wnnln grapnlte
Kenticha, Adola
. Eleinental sulfur can be found near hot springs and volcanic
regions in m y parts of the world. Such volcanic deposits are
currently exploited in Indonesia, Chile, and Japan (Noetstaller,
1988). Significant desposits of elemental sulfur also exist in salt
domes along the coast of the Gulf of Mexico, and in evaporites -in
Eastern Europe and western Asia. The sulfur in these deposits is
believed to come hm the action of anaerobic bacteria on sulfate
eerals, especially gypsum. Such deposits are the basis for
commercial production in the United States, Poland, Russia,
Turkmmistan, and Ukraine (Noetstaller, 1988).
Common naturally occurring sulfur compounds include the
metal .sulfides, such as pyrite (iron sulfide), cinnabar (mercury
sulfide), galena (lead sulvex sphalerite (zinc sulfide) and stibnite
(antimony sulfide); and the rnd sulfates, such as gypsum
cium sulfate), aiunite (potassium aluminium surfate), and barite