Don Valley Deposits
Over much of its extent, the Don Valley is underlain by Selwyn Chihong's wholly owned Nod claims. The Nod claims are located in the valley bottom flanking Don Creek and cover the approximate 7 kilometre gap between the Anniv and Brodel deposits. Prior to the 2005 drilling program the area had not been tested by diamond drilling. Previous geochemical surveys by Expatriate Resources Ltd. had defined several geochemical anomalies suggesting the presence of the Active Member.
The Don deposit was the second major discovery made in 2005 (see September 6, 2005 news release) as part of Selwyn’s first major exploration program on Selwyn Project.Â Initial targeting for zinc-lead mineralization in the Don Valley was driven by a combination of following-up on historical base metal geochemical anomalies over interpreted favourable strata in the structural panel adjacent to the Anniv East deposit that had been defined by former project operators in the 1970’s.Â
Looking southeast down Don Creek Valley from Anniv Central
Don Valley - 3D View of Section Locations
The NOD claims cover approximately 7 kilometres of the Active Member on the apparent northeast limb of a synclinal trough. Prior to the 2006 drilling, the favourable strata were projected to occur at a shallow depth in the valley bottom and to represent an attractive untested target. Drill hole DON-004 intersected 39 metres of the Active Member grading 3.64% zinc and 0.99% lead consisting of an upper and lower zone of higher grade mineralization. Subsequent drill holes indicated that there are numerous fault offsets to the Active Member and that detailed drilling is warranted to define the near-surface distribution and grade of the Active Member.
Of particular interest is higher grade intercepts in DON-042 and DON-044 that suggest an improvement in grade with depth, as illustrated in the Don deposit cross-section. Similarly, the higher grades in holes DON-046 and DON-037 in the Don East and HC West deposits respectively, suggest a transitioning with depth to higher grades.
Don Deposit - Vertical Longitudinal Section (2007)
Don Deposit Cross Section 1 (2007)
Don Deposit Cross Section 2 (2007)
The initial drilling in the 2007 program explored the continuity of this higher grade mineralization. Continuity of such mineralization would imply a core zone with possible regional extent (see 2007 news releases).
The following there sections provide a graphical representation of the information provided in the August 15, 2011 news release that discusses the new target for high grade mineralization in the deeper part of the Don deposit and possible linkage to similar high grade mineralization in the Don East deposit. The Don Connector target has the potential for large tonnages of high grade mineralization. The indicated thickness of the mineralization and the shallow dip of the mineralization provide an attractive opportunity for application of bulk low cost underground mining. A total of 14 drill holes was completed in the Don Connector target in winter 2011/2012. Numerous of these drill holes intersected thick mineralization confirming the probability that Don and Don East deposits connect at depth.
Don Deposit Cross Section Extension At Depth
Don Deposit Oblique Section of Don East Target
Plan Section of Don Connector Target