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In late July 2010, a new discovery of gold mineralization was made 100 km east of the Tiger Zone while following up anomalous arsenic values documented in the Yukon Geological Survey stream sediment geochemical data base. Prospecting and soil geochemical sampling by ATAC has outlined six areas of gold mineralization in bedrock and talus within a 2 km by 3 km area at the east end of a 25 km long belt of anomalous arsenic geochemistry termed the Nadaleen Trend. Assays of mineralized limestone samples range from less than 1 g/t gold to 66.6 g/t gold.
The primary focus of exploration within the Nadaleen Trend is the delineation of Carlin-type gold mineralization. Additionally, concurrent and aggressive regional exploration programs involving geological mapping and geochemical sampling along the entire 185 km long claim block are ongoing to vector in on additional areas of anomalous gold mineralization.
Seven areas of Carlin-type gold mineralization are present within the Nadaleen Trend, where 89 diamond drill holes totalling 26,600 m were completed. This work has outlined significant mineralization on the Conrad, Osiris, Isis and Isis East occurrences. Host rocks are Middle Proterozoic to Lower Paleozoic silty limestone, calcareous diamictites, non-calcareous siliciclastics and mafic intrusions that have undergone polyphase deformation.
Gold mineralization occurs within all units but is best developed within the limestone sequences where alteration is characterized by decalcification accompanied by peripheral calcite flooding. Mineralization within non-calcareous rocks is generally by brittle fracturing and directly associated with fault breccia and/or intense fracture development. Gold mineralization is most commonly associated with black, fine grained sooty pyrite, and is sometimes accompanied by the arsenic sulphides realgar and orpiment.
The setting, mineralization and alteration of the Nadaleen Trend showings are completely consistent with their classification as Carlin-type gold deposits.
- 1,898 metres in 9 diamond drill holes
- Prospecting, stream sediment and soil sampling
- Discovery of 4 zones: Osiris, Conrad, Eaton and Isis
- Nadaleen Trend defined over 25 km
- Total of 26,600 m in 81 holes completed
- Five drill-confirmed zones within a 4 x 3 km area: Osiris, Conrad, Isis East, Isis and Amon
- Total vertical extent of gold mineralization between Conrad and Osiris is in excess of 1 km
- Drilling extended Conrad to ~500 m length x 500 m depth and remains open to the north, east, west and at depth
- 93% of holes drilled at Conrad intersected better than 3.0 g/t gold over 3 m
- Osiris strike length extended over 800 m toward Nadaleen feeder system and remains open at depth
- All 29 holes that intersected the Osiris mineralized zone in 2010 and 2011 encountered gold mineralization with 20 drill holes intersecting better than 3.25 g/t gold across significant widths
- Regional targets, Pyramid, Dale and Ptah to be followed-up on in 2012
- Drilling at Conrad extends gold mineralization to over 800 m strike length while also confirming the near surface, high-grade and continuous nature of mineralization
- Discovery of the Anubis and Pharaoh Carlin-type sub-districts within the Nadaleen Trend 10 km west and 13 km northeast of Conrad/Osiris, respectively
- Drilling at the newly discovered Sunrise Zone in the Conrad/Osiris area returns 14.86 m of 10.54 g/t gold and it remains open in all directions
- Isis East Zone drilling confirms significant widths, grade and down-dip potential
- Completion of over 37,000 m of diamond drilling on time and on budget
- Over 20,000 soil and rock samples taken from the property-wide 1,700 sq/km regional exploration program
- Forty sq/km of additional staking completed to cover newly identified gold and pathfinder anomalies 13 km northwest of Pharaoh
- Wide-spaced geochemical transect surveys conducted in late 2012 have identified numerous gold and Carlin-type pathfinder element anomalies within a 150 sq/km area surrounding Anubis
2013 Exploration Plans
- Definition drilling of high-grade at or near-surface discoveries at the Sunrise, Isis East and Anubis zones
- Advance regional exploration targets identified in late 2012