The K occurrence is outlined by a coincident copper-molybdenum geochemical anomaly, located 4.5 kilometres north of Middle Lake, and 30 kilometres south of Kleena Kleene. The area is underlain by rock of the Lower Cretaceous Taylor Creek Group which is intruded to the east by Late Cretaceous tonalite and minor quartz diorite; and to the west by Late Cretaceous to Paleocene granodioritic rocks of the Bendor Suite. The Taylor Creek Group is known to consist of intermediate to felsic volcanic flows and tuffs; volcanic breccia and conglomerate; and local intercalations of sandstone, siltstone and shale.
Most of the K area is reported to consist of dacitic, andesitic or basaltic agglomerates and tuffs; minor, very impure quartzite (possibly ash tuff) and greywacke. These are intruded by stocks (possibly joined below the surface) of hornblende quartz monzonite and granodiorite porphyry, and by younger dacitic porphyry dikes. The dikes are up to 30 metres thick; their emplacement was probably fault controlled.
Two major fault systems are present, marked by dikes or by indurated gouge zones up to 6 metres thick. Respectively, they strike 340 and 290 degrees, and dip 70 degrees southwest and 65 degrees north. The area is well fractured and hydrothermally altered, and is marked by a large gossan. The volcanics and intrusives have been affected by strong silicification, sericitization, and pyritic and argillic alteration. The colour of the rocks becomes lighter with the degree of alteration and fracturing.
The main anomaly is about 550 metres across; it is suspected to result from the leaching of copper sulphides (Assessment Report 5498). In indicated an area with coincident anomalous values in copper and molybdenum surrounded by a weak zinc anomaly.
In more detail, zones of a number of secondary minerals have been outlined, including biotite, magnetite, sericite and epidote, as well as a zone of greater than 5 per cent pyrite and/or pyrrhotite in the northeastern half of the anomalous area. A zone of very intense quartz-magnetite-biotite-limonite-pyrite stockwork veining is present adjacent to the main anomaly. The nature of mineralization is not specified, although the presence of chalcopyrite may be assumed from the most anomalous rock sample which assayed 0.1 per cent copper (Assessment Report 5498).
A though copper and molybdenum grades are very low at surface, there is some evidence of leaching; and the observed alteration including broad zones of quartz (silicification and quartz veining), biotite, magnetite and pyrite-pyrrhotite indicate a porphyry target (Assessment Report 23265). Rare traces of chalcopyrite were noted in 1993.
WORK HISTORY
In 1974, Cities Service Minerals Corporation collected a total of 195 samples (151 rocks, 22 soils, 21 talus and 1 stream), as part of the year's work on their K claims (Assessment Report 5498). An 850 metre long IP line was run down the valley bottom in order to penetrate the loose gravel and boulders. Results were inconclusive.
Work in 1973 was referred to in the History section of Assessment Report 5498: "Last year's results indicated an area with coincident anomalous values in copper and molybdenum surrounded by a weak zinc anomaly. Strongly silicified, sericitized and pyritized andesitic and dacitic volcanics and tuffs were reported. Most striking of all was rock sample 35303 located in the center of the anomalous area~that assayed 0.005 per cent molybdenum and 0.1 per cent copper (Assessment Report 5498).
In 1993, Armenex Resources of Canada Inc and Ag Armeno Mines and Minerals Inc conducted a program of preliminary rock sampling, prospecting and mapping over their MID claims in order to verify results of previous work by Cities Services Minerals and to investigate the gold potential. A total of 29 rock samples were collected.
