RB3 (Red Block 3)

St. Michael Uranium Mines

In 1952, St. Michael Uranium Mines (Saskatchewan Assessment report 74N07-NW-0089) conducted geological mapping and diamond drilling in their Fox 1-6 group of claims; claims Fox 4 to 6 were located within the RB3 property and along the north side of Heatherington Lake.  A total of 8 diamond drill holes (DDH) were completed, with holes M1 to M5 being drilled on the north shore of Heatherington Lake within the Fox 5 claim, hole M6 was drilled on a small island in Heatherington Lake within Fox 2, hole M7 was drilled on the south shore of Heatherington Lake in Fox 1 and hole M8 was drilled within Fox 6 on the north of the east side of Heatherington Lake.  Of these 8 holes, only hole M1 had significantly elevated radioactivity to warrant assays.  Of the samples assayed from hole M1 two produced high uranium results: sample M-12 assayed 0.78% U3O8 over 1 foot (0.3 m) core length and sample M-14 assayed 1.06% U3O8 over 1 foot (0.3 m) core length.

Milliken Lake Uranium Mines Ltd.

In 1953 Milliken Lake Uranium Mines Ltd. (Saskatchewan Assessment report 74N07-NW-0106) conducted geological and structural geological mapping, and geiger radiometric surveying in their group of claims identified as PAN 1 to PAN 14.  This work revealed only one radioactive showing, which they called Discovery No. 1; this prospect is within the former PAN claim 14 just south of the western shore of Milliken Lake.

In 1955, Scientific Prospecting and Development Engineers (S.P.A.D.E.), on behalf of Milliken Lake Uranium Mines completed a more detailed lithogeochemical survey of outcrops within this group of claims.  Using air photos, S.P.A.D.E. created a systematic, predetermined sampling grid with 400 feet (122 m) rectangles.  This was followed by fieldwork where S.P.A.D.E. collected a suite of rock samples from the predetermined grid points, and also conducted geological, structural and alteration mapping.  The rock samples were then analyzed by X-Ray Diffractometer (XRD) and Spectroscopy to determine the approximate mineral content for quartz, orthoclase, albite, biotite, muscovite, chlorite, amphibole, calcite, dolomite/ankerite and total iron.  They used these results to produce ‘mineral distribution maps’.  From these distribution maps they inferred zones of increased metasomatism; for example from the albite distribution map they suggested that increased albite may reflect zones of sodium metasomatism.  Albitization and sodium metasomatism are spatially and possibly genetically related to the uranium deposit that exists at Gunnar.

Maree Uranium Limited

In 1953 Maree Uranium Limited (Saskatchewan Assessment report 74N07-NW-0084) conducted a large amount of work in the ground now occupied by the RB3 claim block; this work included geological mapping and a detailed geiger radiometric survey along lines spaced at 50 to 75 feet (15 to 23 m) intervals.  The Geiger radiometric surveys lead to the discovery of seventeen radioactive showings that are near the southwest corner of Milliken Lake and on Alf Island which is about 800 m to the north east.  These radioactive zones range from “strongly radioactive cross fractures 100’ [30.5 m] or more in length carrying scattered lenses of pitchblende to small “spot” showings” as described by Moore (1953).  Moore (Ibid) indicates that these features are related to either a “[p]ronounced lineation which runs from the southern end of Milliken Lake westward to a small pond...[or]...are associated with the granite gneiss-mafic contact that runs close to the showings.”  Grab rock samples from a few of the showings include: (i) from showing M-1, samples with 1.50% and 1.24% U3O8, and (ii) from showing M-2, samples with 0.17% and 3.32% U3O8.  There were also several other samples at showings M-1, M-11 and M-17 that contain greater than 0.05% U3O8.

Tobe Mines Ltd.

In 1966 Tobe Mines (Saskatchewan Assessment report 74N07-NW-0157) conducted prospecting on their property on the Crackingstone Peninsula that now encompasses the southern portion of the current RB3 property.  This prospecting led to three main radioactive occurrences (named by them the X, Y and Z zones) and several minor isolated occurrences.  Of these three major occurrences only the Z zone is located within RB3.  The Z zone is on the northern shore of Heatherington Lake, approximately due north from the small island within the lake.  Trenching was done on this occurrence which involved expanding two out of three trenches from previous explorers, and drilling and blasting three new trenches.  Of these three new trenches, two were excavated along the shoreline of Heatherington Lake and the third is located about 800 feet (244 m) north.

Metalur Ltd.

In 1976, Trigg, Woolett & Associates Ltd conducted work in the RB3 and surrounding area on behalf of Metalur Ltd. (Saskatchewan Assessment report 74N07-NW-0261).  The fieldwork was conducted within then claims CBS 2666, CBS 2669, CBS 2670, CBS 2686, S-88174 and S- 88180.  Of these, only CBS 2670 and CBS 2686 were located partly within the RB3 claim block.  The 1976 work included airborne spectrometer, lake sediment and lake water sampling, geochemical soil sampling (especially along faults), radon in soil gas measurements (especially along faults), ground radiometric prospecting, examinations of old radioactive occurrences and trenching. Most of this work was focused on CBS 2666.

Of the two claims that were located at least partly within the RB3 block (CBS 2670 and 2686) the fieldwork performed resulted in the following;

(a) The airborne spectrometer survey revealed 4 radiometric anomalies in CBS 2670 with one of these likely being due to a waste rock pile and nine radiometric anomalies in CBS 2686 where one is coincidental with a radioactive trench.

(b) One lake sediment sample anomaly of 78 ppm uranium exists in CBS 2670 and three lake sediment sample anomalies between 51 and 71ppm uranium were found in CBS 2686. Any result greater than 50 ppm uranium in lake sediment was considered significant by Ahuja (1976).

(c) There are four radioactive occurrences documented in the appendix of Ahuja (1976) that are within CBS 2670 and CBS 2686; occurrences A25 and A26 are in the former CBS 2670 and occurrences A19 and A20 are in the former CBS 2686.

Saskatchewan Mining Development Corporation

In 1979, Saskatchewan Mining Development Corporation (SMDC) (Saskatchewan Assessment report 74N07-0290) conducted exploration work on their Crackingstone Project which included then claims CBS 2669, CBS 5498, CBS 5544 and M.C. S-97641.  Of these, only CBS 5544 underlies the ground that is now occupied by the RB3 claim block.  The SMDC fieldwork consisted of ground radiometric prospecting, examination of known radioactive occurrences and detailed geological mapping.  With respect to their CBS 5544 claim the fieldwork was focused on prospecting of overburden covered valleys in the vicinity of major easterly trending faults, these being the Heatherington and Zeemel faults.

This field work led to the discovery of two radioactive occurrences, named HL2 and HL8, within the CBS 5544 claim (Figure 2.5-1).  HL2 is located near the north shore of the east tip of Heatherington Lake. Jiricka (1979) described this showing as follows: “ Maximum radioactivity of 5000 cps [counts per second] was noted along an easterly striking fracture in hematitized amphibolite…The trace of the easterly striking Heatherington Fault is located less than 200 metres to the south and HL2 itself lies on the edge of a northeasterly trending overburden filled draw possibly underlain by a northeasterly striking fault" (Bell, 1962).  He also described HL 8: “HL8 is located on a northeasterly striking pegmatite ridge north of Heatherington Lake.  A spot high of 3700 cps and values of 900-1900 cps over 100 metres were recorded in this area.  The highest radioactivity was obtained over fractures in the pegmatite body”.

In the recommendations Jiricka (1979) suggested that further detailed prospecting of CBS 5544 be carried out.  Also, that detailed re-examinations of HL2 and HL8 should be done and stripping of overburden and trenching should be completed if necessary. In 1978 and 1979, Saskatchewan Mining and Development Corporation completed an airborne electromagnetic survey on several claims on the Crackingstone Peninsula.  These lines were flown at 200 m spacing. The geophysical maps which are included in assessment report 74N07-0276 indicate there are a few electromagnetic trends that run through and around Milliken Lake and into the northern portion of RB3.

©2007 Red Rock Energy Inc.

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