The Kitza prospect covers a wide area of minor copper-lead-zinc mineralization in the Peg, Rous and JW claims, collectively known as the Kitza claims, located on Kitza Creek, 9 kilometres west of its confluence with the Kechika River (Assessment Report 9442, Maps 1 and 2).
The Kitza property is hosted within the Kechika Trough, an extensive belt of Paleozoic platformal sedimentary rocks that is the southerly continuation of the Selwyn Basin in Yukon (Geological Survey of Canada Maps 46-1962, 1712A, 1713A).
The Kitza property is located within the Rabbit Plateau and outcrop is limited, generally confined to incised creek valleys; however, mapping has defined a succession, greater than 1000 metres thick, of mainly fine-grained sedimentary rocks and minor tuffs ranging in age from possibly Upper Proterozoic to Devonian (Assessment Report 9442). The oldest rocks in the succession dominate the northern part of the property and consist of Upper Proterozoic or Cambrian pyritic phyllite, slate and limy siltstone. These are overlain by Lower Cambrian black mudstone, limy mudstone and minor pyritic siltstone, followed by thinly bedded Middle Cambrian limy mudstone, limestone, tuff, chert and siltstone. Above this is the Ordovician to Lower Devonian Road River Group, composed of slaty siltstone, mudstone and calcareous mudstone, cherty mudstone, shale and sandstone. Some of the shale contains Upper Ordovician graptolites. The Silurian-Devonian part of the group is dominantly calcareous, comprising limy mudstone, limestone and calcareous sandstone. The youngest unit present is the Devono-Mississippian Besa River Formation, composed of slaty and cherty mudstone, shale and siltstone.
The oldest, phyllite unit appears to dip steeply to the east or west. The overlying Paleozoic succession is separated by an angular unconformity and bedding within it is rather variable, the general strike being west or northwest with moderate south or southwest dips. Northwest-striking thrust faults have been mapped locally, and probably have exerted some control on topography. This is also true for northeast-striking cross faults, as outcrops of fault breccia or solution breccia are common in valley bottoms.
No SEDEX-type mineralization has been found. Rather, one or more of tetrahedrite, sphalerite, barite, quartz, calcite and rare galena occur in veins in limestone or limy mudstone or siltstone, most commonly in the Middle Cambrian unit and to a lesser extent in the Silurian-Devonian carbonates (Assessment Report 9442). The sphalerite is honey brown. In addition, pale-green fluorite was found in a few veins, and smithsonite is present in the matrix in fault breccias.
Dozens of individual showings have been mapped on the property, over a distance of approximately 8 kilometres and width of 3 kilometres. The occurrence has been positioned approximately in the centre of them. None of the showings are very large and base metal grades are low. The mineralization was interpreted to be due to secondary dewatering of the sediments rather than to regional hydrothermal activity (Assessment Report 9442).
A sample of sphalerite- and malachite-bearing quartz veins in limestone assayed 0.42 per cent zinc and 0.12 per cent barium (Geoscience Map 1998-10 and Bulletin 107, page 88).
In 2011, Colorado Resources collected 44 rock grab samples and 362 soil samples. A grab sample (1285561) yielded 1.230 per cent zinc and the highest copper-in-soil value was 100.5 parts per million (Assessment Report 33291).
