head
Yellowknife Gold Project
Ormsby and Nicholas Zones

The Ormsby Zone is located southwest of the Nicholas Lake Zone and is close to the Bruce Zone and the historic Discovery Mine.  The Ormsby Zone was first discovered in 1944 and acquired by Ormsby Mines.  In the 1950’s the property was acquired by Discovery Mines Ltd. which conducted exploration work.  Discovery Mines Ltd. operated the nearby Discovery Mine producing over 1 million ounces of Gold.  The property consists of 14 mineral leases covering an area of 6,333 hectares. 

Development on the property consists of 140,000 metres of surface and underground diamond drilling and 959 metres of underground decline.  Approximately 6,800 tonnes of gold mineralization from two sub-drifts within the deposit are stockpiled on surface.

The Nicholas Lake property was first staked in 1941 by Cominco Ltd. Trenching exposed gold-bearing quartz veins hosted by a small granodiorite intrusion. In 1994, 820 m of underground decline development was driven into the Nicholas deposit.  Diamond drill holes into the deposit total 26,000 metres.

 

Tyhee Yeloowknife Gold Project  Ormsby Nicholas

 

Geology

The Ormsby Deposit is exposed on surface, in the Ormsby decline, in sub-drifts, in crosscuts and in drill core. The presence of gold mineralization can be recognized by the coincidence of sulphides and silicification in weakly foliated but strongly lineated hydrothermally brecciated metavolcanic amphibolite. Pyrrhotite is dominant and occurs with lesser pyrite in variable proportions as disseminations, veinlets, semi-continuous streaks and irregular clots in amphibolite and as a minor constituent of quartz veinlets. Minor subhedral to euhedral arsenopyrite occurs as disseminations, blebs and streaks in amphibolite breccia proximal to quartz veins, in narrow quartz veins and in quartz blebs. Chalcopyrite, sphalerite and galena have been observed but are rare.  Quartz is an important but minor component by volume of the mineralized zones. Silicification is post to late-tectonic and occurs as discrete, discontinuous light to dark gray quartz veins, pods, or disseminations that cut foliated and brecciated amphibolite. Visible gold occurs as isolated grains in quartz veinlets, and proximal to sulphide clots in quartz veinlets. Gold grains are also disseminated with sulphides in amphibolite breccia.

 

Ormsby Drill PlanOrmsby Drill Section

Ormsby 3d Resource

 

Tyhee Gold Corp. All rights reserved.
Last updated November 12, 2011