- SMDI #
- 1145
- Current Showing Name
- Ox Lake Allanite Showing (Drill holes 4-OX-1, -3, and -4)
- Historical Showing Names
- Ox Lake Allanite Showing (Drill holes 4-OX-1, -3, and -4)
- Company Name
- Project Name
- UTM Easting (NAD83 Z13)
- 540300.4900
- UTM Northing (NAD83 Z13)
- 6383605.3800
- NTS Sheet
- 074H09
- TRM (Township-Range-Meridian)
- 99-15-2
- Primary Commodities
- Uranium
- Associated Commodities
- Rare Earth Element (Unspecified), Thorium
- Discovery Type
- Drillhole
- Status
- Prospect: Primary Exploration
- Geological Details
- The outcrop and subsequent drill holes which constitute this showing are located on the southwest shore of Ox Lake. The showing is located between 300 and 500 ft (121.9 to 152.4 m) west of the base line at 3+00S.
The area of the showing was first investigated to locate anomalies outlined by an airborne radiometric survey. Radioactive conglomerate beds up to 50 cm thick at the base of the Athabasca as well as anomalously radioactive pegmatite dykes were located. Drill holes were completed to intersect the Athabasca-basement contact, but drill core samples returned assays of only 0.03% ThO2 and nil U3O8.
The showing consists of an occurrence of allanite a hydrous silicate of calcium, aluminum, iron, and cerium (Ca,Ce,Y)(Al,Fe)3(SiO4)3(OH). The allanite occurs in a series of small shear zones which cross-cut a second generation pegmatite dyke within Athabasca Group conglomerates. The allanite mineralization occurs in local concentrations and secondary enrichments (due to weathering) along joints and fractures within the pegmatite. The mineralization has been traced over a strike length of 800 ft (243.8 m).
In 1970, ten holes, which were completed on the mineralized zone, intersected northeast-trending Wollaston Group biotite gneiss which is cut by segregation pegmatites and later dyke-like pegmatites. The following assays were returned:
DRILLHOLE INTERSECTION PCT PCT INTERSECTION
NUMBER FT M U3O8 ThO2 DESCRIPTION
______________________________________________________________________
4-OX-1 136-137 41.5-41.8 0.09 ---- sheared pegmatite
137-140 41.8-42.7 0.01 ---- sheared pegmatite
140-145 42.7-44.2 0.31 0.22 sheared pegmatite
168-170 51.2-51.8 0.09 0.04 sheared pegmatite
176-180 53.6-54.9 0.05 ---- sheared pegmatite
180-185 54.9-56.4 0.10 0.03 sheared pegmatite
502-504 153.0-153.6 0.04 0.04 biotite gneiss
595-597 181.4-182.0 0.10 0.10 biotite gneiss
4-OX-3 137.5-138.5 41.9-42.2 0.07 ---- pegmatite
141.0-142.0 43.0-43.3 0.10 ---- pegmatite
144.0-144.5 43.9-44.0 0.11 ---- pegmatite
4-OX-4 169.5-170.5 51.7-52.0 0.17 0.03 biotite gneiss
189.0-192.0 57.6-58.5 0.04 0.0 pegmatite
213.5-214.0 65.1-65.2 0.08 ---- biotite gneiss
267.0-270.0 81.4-82.3 0.13 ---- pegmatite
- Geological Domain
- Wollaston
- Host Rocks
- Host Minerals
- Indicators
- Exploration History
- 4/3/1989 In 1968, Gulf Minerals Co. conducted an airborne radiometric survey over its Permit No. 4 (AF 74H09-0019). Follow-up prospecting of anomalous areas revealed the radioactive conglomerate beds detailed above. Six drill holes totalling 2689 ft (819.6 m) were drilled to intersect the Athabasca-basement contact. Core samples returned values of only 0.03% ThO2.
In 1969, the area was covered by a combined airborne electromagnetic magnetic, and radiometric survey program. During follow up ground radiometric, magnetic, eletromagnetic and geochemical surveys in anomalous areas the allanite occurrence discussed above was located.
The area was mapped in detail and the showing was diamond drilled in 1970 (AF 74H09-0020). Ten BQ holes totalling 5774 ft (1759.9 m) were completed on the mineralized zone and returned the assays listed above.
No further work in the area was reported.
- Production History
- Reserves and/or Resources