The Horn prospect (previouly known as the SF) is situated on the Klastline Plateau 2.5 kilometres west of Nuttlude Lake.
This prospect occurs in an area regionally mapped as Unit lJavb (Open File 1997-3) of the Lower Jurassic Hazelton Group. This unit consists of andesitic volcanic breccias and conglomerates. These are described as grey-green and maroon, feldspar hornblende-porphyritic andesitic to dacitic debris flows and lahars; minor flows; with intervals of green and maroon epiclastic conglomerate and medium to coarse-grained crystal lithic wacke with angular, red mudstone fragments.
The Horn property was staked initially as the SF claims in 1964 when prospectors for Conwest Exploration Co. Ltd. located a number of galena-sphalerite plus/minus native silver veins in the Dedeia Creek area. Conwest followed up in 1965 by excavating 871 metres of trenches and drilling 326 metres in 3 diamond-drill holes. This work located a number of barite-rich shear and fracture zones within a red volcanic conglomerate. In 1979, the Horn and Silver claims were staked for D.A. McLeod who sold it to ERL Resources Ltd (who subsequently changed their name to Tenajon Silver Corp). In 1980, ERL prospected and collected 181 soil samples. In 1981, Tenajon drilled 712 metres in 7 diamond-drill holes. A number of silver-bearing veins were discovered during this program. In 1989, the Horn property was optioned from Tenajon Resource Corp. by Ascot Resources Ltd. and Dryden Resource Corporation. Exploration work in 1989 consisted of examination of known showings, minimal stream silt sampling (7), contour soil sampling (96), rock sampling (24), prospecting and mapping. Detailed mapping and a further 119 rock samples and 69 soil samples were taken in 1990 for Ascot and Dryden.
Property rocks are described as a massive sequence of pebble and boulder conglomerate. This conglomerate has been subdivided into three units; the lower "red", the middle "green" and the upper "brown". This sequence dips to the west at about 50 degrees. These rocks are cut by four felsite sills, the largest almost 30 metres thick, dipping steeply north into the hillside. Recent regional mapping has assigned these felsites an Early Jurassic age. The mineralized area is cut by three large faults, two of which trend northeast and the third northwest.
The mineralization is contained in stockworks and veins of barite occurring primarily in red conglomerate along shear zones, fractures and near contacts with the felsite. Sulphides, including galena, sphalerite, chalcopyrite and tetrahedrite occur but are not abundant. Flakes of native silver have been found. The red conglomerates have been traced in an east direction for 4000 metres but the silver bearing zones are confined to a 650 metre section near the western end of the unit.
Several zones with significant silver mineralization were outlined on surface in 1965 with the best measuring 45 metres long by 4.2 metres wide and averaging 378.52 grams per tonne silver. In 1965, drilling results proved less interesting with the best section containing 49.0 grams per tonne silver over 26.8 metres. However, several short intervals from 0.5 to 1.5 metres contained from 103.0 to 343.0 grams per tonne silver. (All above 1965 results were reported in 1980 Assessment Reportr 8747.) Gold values from 1981 drill core were as high as 23.0 grams per tonne over one metre but were generally of subeconomic grade (Assessment Report 9469).
