The Sefaatli project has been strengthened by the granting of two new exploration licences by the Mining Bureau for Group VI minerals. They will expire on 16 May 2018.
The new licences extend over a combined area of 8,963ha and, together with the granted licence 2008/10035, extend over the entirety of the Sefaatli uranium occurrence discovered by Turkey’s MTA in the mid 1980s.
The Sefaatli project area contains the district’s most significant uranium occurrences outside of our Temrezli project area.
The size of the Sefaatli project area is approximately 50km2 and is centred on the small village of Deliler, located some 10km from the regional centre of Sefaatli.
MTA drilled 171 reconnaissance RC holes for some 21,340m of drill advance. A single diamond bore hole was drilled for metallurgical purposes.
MTA intersected uranium mineralisation in many of the drill holes. Closer spaced drilling at intervals between 100m and 300m in two of the better explored areas at Tulu Hill and Deliler intersected uranium mineralisation over two areas of approximately 1,500m by 1,000m.
MTA ceased exploration at the end of 1985 without drilling deeper than 150m and leaving the Sefaatli project area with uranium mineralisation open in all directions at the Tulu Hill and Deliler sites. There are a number of other near-site occurrences of uranium mineralisation which requires further evalution.
Preliminary bottle roll and column leach test work by the MTA on two Sefaatli samples returned a head grade of 1,700ppm and 2,400ppm U 3O8 and achieved 90% uranium extraction using either an acid or alkali recovery process.
Adur completed its Phase 1 drilling at the Deliler and Tulu Tepe uranium prospects. Deliler drilling focused in areas where previous drilling in the 1980s intersected widespread uranium mineralisation open in all directions. Drilling was a combination of diamond core (HQ) and rotary methods, for 41 holes and a drill advance of 4,600m. Whilst most holes intersected two or more lenses, and one hole up to 5 stacked lenses, drilling confirmed a consistently mineralized horizon which lies between 950-975m asl.
Deposition of mineralization in the horizon is interpreted to be influenced by a recently discovered E-W cross cutting fault and, following geological logging of core, a potential palaeochannel with an associated strong reduction zone which in plan has a sinusoidal “roll front” shape.
At Tulu Tepe a limited drilling program was completed. All drill holes intersected two or more lenses and one hole up to 4 stacked lenses, with a distinct zone of uranium enrichment occurring around 80m beneath ground surface (bgs). Wide spaced drilling was confined to the west and east sides of the prospect. Drilling intersected a thick sequence of sandstones lying between a thin surface limestone and either a granite or volcanic basement at or around 108m bgs. Drilling intersected a number of reduction-oxidation (redox) zones which are essential for the formation of the uranium mineralization, whilst surface mapping to the immediate south of the prospect clearly identifies the upper redox boundary at or about 20m bgs in a cliff exposure. This upper boundary is characterized by strong gamma radioactivity over several vertical metres with scintollometer readings returning some of the best surface values for the Temrezli district.