The Horne occurrence probably consists of several claims and showings between Galena and Dave Morgan Creek.
In each year from 1893 to 1898 some mention is made of the Horne ledge or Horne group. The Minister of Mines Annual Report for 1898 seems to indicate that there was a claim by that name but it is not certain.
The area was largely inactive until the 1980s when a number of the old workings came into the possession of Jack and Eric Denny, through purchase or staking. Please see Silver Leaf (082KNW204) for a description of the recent history of the area.
There are five major bands of limestone in the area which are known locally as the Black Warrior, Silver Leaf, Ellsmere Ledge, Horne Ledge and Surprise limestone. The Black Warrior was mapped by the Geological Survey of Canada as the Badshot Formation. It is now thought that all these bands are part of the Lower Cambrian Badshot Formation, repeated by folding. These bands are interlayered with schist and phyllites of the Cambrian to Devonian Index Formation, Lardeau Group.
While the location of the historic Horne showing is not accurately known, it may be assumed that it occurs on the Horne Ledge, a name that local prospectors have given to one of five limestone bands that can be traced for several kilometres, mainly between Galena and Dave Morgan Creek.
In 1983, the location of a Horne Ledge zone is presented in Assessment Report 11979 and expanded on in 1993 in Assessment Report 22917. This location is accepted as the best fit for the Horne. The heavy oxidation of the zone, mentioned in the earliest reports, is corroborated in these later reports.
In 1993, Assessment Report 22917, reports that the Horne Ledge group included Crown grants Rob Roy (Lot 4288), Highland Chief (Lot 4290), Centre Star (Lot 4239) and Morgan (Lot 1301). This report further states that according to prospector Eric Denny, there are at least five mineralized zones along the Horne ledge.
The character of the mineralization is reported to be almost impossible to determine due the heavy oxidation and leaching of the mineralized zone. Only at certain localities did the samples show visible mineralization. These samples were taken at existing workings where they were able to intersect the mineralization below the oxidized cap. Where observed, the mineralization appeared as massive galena with sphalerite and minor pyrite, pyrrhotite and trace amounts of chalcopyrite.
A sample from an old opencut on the Morgan claim yielded 10.8 per cent lead, 0.05 per cent zinc, 77.49 grams per tonne silver and 0.07 grams per tonne gold (Assessment Report 11979, page 24).
During 2006 through 2009, Mineral Mountain Resources Ltd. completed programs of prospecting, geochemical (soil, silt, talus fines and rock) sampling and an airborne geophysical survey on the area as the Kootenay Arc property.
