Gold mineralization at Ketza River occurs in manto replacement deposits along permissive horizons within Lower Cambrian limestone in the Cache Creek valley. Auriferous massive sulphide deposits of pyrrhotite, pyrite and arsenopyrite have been oxidized and the gold values enriched within structural zones or panels where normal faulting cross cuts the stratigraphy. In general, the mantos have tube - like geometry and consequently close - spaced drilling is required to establish reserves. The important manto deposits occur on the southern flank of the Ketza Uplift (Figure 3).
VG focused on manto exploration during 1994 - 96. Drilling on manto targets has totalled 7,477 metres in 86 holes. This drilling has resulted in the discovery of additional oxide mineralization and also in the reinterpretation of geological controls on the gold mineralization. In addition, the majority of the 476 holes drilled by Canamax between 1984 and 1990, have been relogged as a result of the new geological interpretation. This activity has contributed to a better understanding of the property geology and helped define diamond drill targets. Three limestone beds are now recognized to preferentially host auriferous mantos within the massive Lower Cambrian limestone Unit 1d. Structural deformation has produced repetition of the favourable stratigraphic beds and thickening along fold axes.
The Fork, McGiver, Hinge, Chimney, Hoodoo, and Tarn zones were drill tested with positive results in the 1994 to 1996 programs. Extensions of the Break and Nuzones were also tested and can be correlated with the Fork, McGiver and B-Mag zones. The zones occur as discontinuous bodies within a broad mineralized horizon that hosts the major manto deposits on the property.
Oxide mineralization at the Fork zone has been intersected in 32 drill holes. Oxides are present across widths of 10 to 30 metres and along 170 metres on a northeast - southwest strike trend.
The Chimney zone, discovered in 1994, is a narrow oxide seam containing high grade gold values near surface (2.0 metres grading 36.44 g/t in ddh # 486) which decrease rapidly at depth (2.9 metres grading 7.39 g/t at a depth of 15 metres in ddh #521). The Chimney zone contains a small high grade source of oxide ore which could be partially mined from a surface cut. Other significant oxide intersections in 1995 - 96 include: 7.1 metres grading 15.42 g/t gold (ddh #549) at the McGiver zone; 2.35 metres grading 15.78 g/t (ddh #547) at the B-Mag zone; and 5.3 metres grading 8.43 g/t (ddh #567) at the Hoodoo zone.
An unmined oxide resource block was defined at the Nuzone (Hodgson 1991). This estimate has not been verified.
Sulphide manto deposits occur in a massive discontinuous blanket west of the Peel/Ridge oxide deposits. The sulphide mineralization occurs throughout an area of 400 metres by 400 metres with thicknesses of 10 25 metres. A 1996 test hole (#561) confirmed the ore grades within the Peel West zone (15.8 g/t over 4.5 metres and 9.3 g/t over 4.75 metres). Drill hole #559 intersected 15.0 metres of massive sulphides grading 7.93 g/t (including 9.0 metres grading 11.3 g/t) in a new zone 200 metres north of the Peel West zone within the same stratigraphic horizon.
Ketza River Diamond Drill Assay Results
2009 and 2010 Ketza River Project Drilling Results
2010 Ketza River Diamond Drill Assay Data for Bluff Zone
Ketza River Diamond Drill Assay Data for 2008
Ketza River Diamond Drill Hole Assay Data for Assays received before June 30th, 2008.