- SMDI #
- 1021
- Current Showing Name
- Ruby Lake Pb-Zn Occurrence, "A" Lake Cu Occurrence
- Historical Showing Names
- Ruby Lake Pb-Zn Occurrence, "A" Lake Cu Occurrence
- Company Name
- Project Name
- UTM Easting (NAD83 Z13)
- 508820.6700
- UTM Northing (NAD83 Z13)
- 6303449.6100
- NTS Sheet
- 074A15
- TRM (Township-Range-Meridian)
- 91-18-2
- Primary Commodities
- Copper
- Associated Commodities
- Arsenic, Lead, Molybdenum, Zinc
- Discovery Type
- Outcrop Grab
- Status
- Mineral Location
- Geological Details
- The A Lake Occurrence is located slightly east of the south end of "A"Lake. The Ruby Lake Occurrence is located west of Ruby Lake - a northwest trending lake which is 4.5 miles (7.2 km) east of the Kaz Showing or SMDI 1017.
The area of the Ruby Lake Showing is underlain by a northeast-trending sequence of quartzitic metasediments, consisting of an assemblage of biotite schist, quartz-feldspar gneiss, biotite gneiss, quartzite, argillaceous black quartzite and calc-silicate gneiss of the Needle Falls Shear Zone, Wollaston Group. The assemblage to the west of Ruby Lake is extensively sheared.
The showing consists of numerous small occurrences of pyrite-pyrrhotite- graphite and pyrite-arsenopyrite mineralization along the Wathaman River. Trace amounts of molybdenite were noted associated with pyrite in quartzite boulders, frost heaves and on outcrops in three locations.
Disseminated pyrite and pyrrhotite were noted in 1970. Two outcrops containing up to 20% arsenopyrite in quartzitic metasediments were also noted. Assays of samples returned only 0.01% Pb and 0.02% Zn.
The "A" Lake Occurrence or Prospect consists of an exploration-delineated series of EM conductive zones with coincident magnetic anomalies over a strike length of 1.42 miles (2.29 km). The showing consists of pyrite-pyrrhotite fracture filling style mineralization in highly sheared pelite (biotite schist) and folded quartzitic biotite gneiss and argillaceous quartzite. Only trace amounts of chalcopyrite were observed on outcrop and in three drill holes which Great Plains completed on the mineralized horizon.
Scott concluded that the rocks which host this showing are part of the same mineralized horizon which hosts the Zap Claims Showing or SMDI 1020.
The Ruby Lake Occurrence, as outlined by ground geophysics and 8 x-ray holes completed by Great Plains Development Company, consists of minor pyrite and pyrrhotite fracture fill and disseminated types of mineralization within a series of interbedded fine-grained grey quartzites and graphitic pelites (biotite gneiss). Drill hole no. 3 intersected up to 1% fracture fill pyrite in biotite gneiss. Drill hole no. 5 returned 0.08% Cu and 0.05% Cu over 2.0' and 2.5 ' intervals in quartzite and argillite. Drill hole no. 6 returned 0.02% Pb, 0.01% Zn over 2.5 ft in quartzite and argillite.
- Geological Domain
- Wollaston
- Host Rocks
- Host Minerals
- Arsenopyrite, Molybdenite
- Indicators
- Exploration History
- 9/14/1988 In 1968, E.Partridge noted numerous small occurrences of pyrite-pyrrhotite-graphite and pyrite-arsenopyrite mineralization along the Wathaman river, between the south end of Ruby Lake, and the northern end of Zap Lake (AF 64E05-0010).
In 1969, eight Winkie drill holes totalling 927 ft (282.5 m) were put down on airborne EM conductors on the west shore of Ruby Lake by Great Plains Development Co. of Canada Ltd. They covered the area with an airborne radiometric survey later the same year.
In 1970, ground radiometric and geochemical sampling surveys were conducted betweeen Ruby and Zap Lakes by Great Plains. Only minor disseminated pyrite-pyrrhotite mineralization was noted.
On 31 March 1993, Noranda Exploration Company Limited (NPL) staked the showing as S-105850. The claim lapsed on 1 September 1995.
- Production History
- Reserves and/or Resources