Abstract
SUMMARY A new gold deposit Mananila was discovered in the northern part of the Morogoro province of the Repub-lic of Tanzania. In this region, where the Proterozoic structures of the Uzagaran mobile belt were developed, until any significant manifestations of gold mineralization wasn’t known. Mananila deposit represent by a large volume object, from 400 to 450 meters long, and from 60 to 80 meters thick. Mineralized weakened zone presented by over intensely leached and schistosed migmatites, gneisses, amphibolites, penetrated by echelon systems of quartz veins and veinlet, steeply dipping bodies of quartz breccia from 1.0 to 1.5 meters thick. Gold content is from 0.61 to 8.11 g/t, the average content is from 2.5 to 3.0 g/t. Similar structures, which parallel to the main zone, developed on this site, although they have lower thickness. The inferred resources of the deposit are estimated about 20 tons of gold. All these objects are located within a large weakened zone of northeast-ern strike with a width of 4–5 kilometers and a length of over 20 kilometers. This information serves as the basis for the identification of a new gold ore region in the northern part of the Morogoro province of Tanza-nia, within the Proterozoic mobile belt of Usagaran. The possible gold mineralization this region never has been previously discussed in geological literature.
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