Results: Isambara
In 2009, a detailed soil survey was completed on the property. The MMI technique was used to obtain greater detail compared with previous conventional soil sampling surveys. The MMI survey and drill results confirm the importance of the gold-bearing system and its significant strike length of 4 km. Drill results indicate that the MMI soil anomalies are related to areas of higher gold-bearing sheeted vein density in granodiorite a few hundred meters from its western margin. The 2009 drill results on the South zone coupled with the MMI results confirm the need to extend the drill program outside the South zone to include other gold anomalies interpreted to coincide with a potentially large gold system.
Preliminary exploration models include orogenic gold or the model MDN favours at this time, a reduced intrusion-related gold system typified by deposits such as Fort Knox in Alaska (158 Mt @ 0.83 g/t Au) and Vasilkovskoe in Kazakstan (80 Mt @ 3.7 g/t Au).
Future exploration work will focus on locating areas hosting high-density sheeted veins with the potential to form large deposits with grades amenable to open pit mining.
- The Isambara project is located in the western extension of the greenstone belt that hosts the Geita mine, a world-class gold deposit.
- Soil surveys have outlined the largest gold soil anomaly in the Tulawaka region in an area over the granodiorite.
- The highest gold values coincide with scattered pyrite zones with traces of chalcopyrite and centimetre-wide quartz stringers that form the sheeted veins
- The mineralization is associated with intrusive rock of granodioritic composition.
- The southern gold zones are interpreted as being related to alteration and mineralization peripheral to a larger system. The soil anomalies in the central and northern zones that form an extension of the southern zone need to be drilled.
- The geology and types of alteration and mineralization show similarities with reduced intrusive-related ore deposit models such as the Fort Knox deposit in Alaska (158 Mt @ 0.83 gt Au) and Vasilkovskoe in Kazakstan (80 Mt @ 3.7 g/t Au).
The technical and scientific information contained in this document has been reviewed by Marc Boisvert, engineering geologist and Vice President, Exploration, who is a qualified person under National Instrument 43-101.