Angilak Property, Nunavut
With an NI 43-101 Inferred Mineral Resource Estimate of 2,831,000 tonnes grading 0.69% U3O8 (15.2 lbs U3O8/tonne), totalling 43.3 million lbs U3O8 at a 0.2% U3O8 cut-off grade, the Lac 50 Trend Deposit is Canada's highest grade uranium deposit outside of the Athabasca Basin. Kivalliq's flagship project, the 340,268 acre Angilak Property in Nunavut, hosts the high-grade Lac 50 Trend deposit. In addition to the Lac 50 Trend deposit, the Angilak Property hosts several high priority zones including the Hot, Pulse, Nine Iron, Blaze, Flare and Southwest that were advanced through a combination of Kivalliq's exploration efforts in 2012.
In 2012 Kivalliq completed a highly successful, $20 million exploration program at Angilak. The exploration season commenced in March 2012 with the mobilization of crews and equipment to the existing Nutaaq camp and was completed by October 2012.
The 2011 drill program totaled 23,849 metres in 153 diamond drill holes and an additional 6,411 metres in 88 exploratory holes using a reverse circulation (RC) drill rig. Of the 88 RC holes drilled this year, 45 holes generated anomalous radioactivity greater than 500 cps. Diamond drilling largely focused on resource expansion east and west of the high grade Lac Cinquante deposit and exploratory drilling at the Blaze Zone. The Kivalliq team considers both the Western Extension and Eastern Extension zones to be part of the same northwest-southeast trending geological structure which hosts the high grade Lac Cinquante uranium resource.
The Company also undertook an aggressive targeting campaign this season, with results and interpretation pending from: 5,470 line kilometres of DIGHEM airborne magnetic, electromagnetic and radiometric surveying; 1,640 line kilometres of ground magnetic, VLF electromagnetic and gravity surveys; and a prospecting program which entailed the collection of 273 rock grab samples and 342 soil geochemical samples.
Please click on the specific links below to read comprehensive zone descriptions
Lac 50 Trend
The updated Mineral Resource estimate for the Lac 50 Trend was prepared under the direction of Robert Sim, P.Geo. of SIM Geological Inc. Resource models were generated using drill core sample assay results and interpretation of a geological model relating to spatial distribution of uranium deposits within the Lac 50 Trend, i.e. Lac Cinquante (Main, Eastern and Western Extension Zones), J4 and Ray deposits. All assay and geological information was derived from work conducted by Kivalliq as part of exploration programs between 2009 and 2012 and available at December 31, 2012. At a base case cut-off grade of 0.2% U3O8, an Inferred Mineral Resource is estimated at 2,831,000 tonnes grading 0.69% U3O8, containing 43.3 million lbs. U3O8. For evaluation purposes, three additional metals: silver (Ag g/t), molybdenum (Mo %) and copper (Cu %) have also been estimated within the resource model.
The increase in the Inferred Mineral Resource from the previous 2012 estimate is primarily attributed to the addition of the newly-discovered J4 and Ray deposits, situated near surface and 1.8 kilometres along strike from the eastern margin of the Lac Cinquante Eastern Extension zone. The sensitivity of mineral resources contained within the Lac 50 Trend is presented at a series of U3O8 cut-off thresholds for comparison purposes in Table 2 and the base case cut-off grade of 0.2% U3O8 is highlighted. Kivalliq believes that the base case used is conservative but appropriate at this stage of the project’s development.
Updated Inferred Mineral Resources Estimate for Lac 50 Trend (0.2% U3O8 cut-off)
The Resource Model
Kivalliq has drilled 449 core holes totalling 75,782 metres on the Angilak Property over the past four years: Sixteen were completed in 2009, 107 holes in 2010, 153 holes in 2011, and 173 during the 2012 field season. Of these, 335 NQ-size holes totalling 59,716 metres were dedicated to delineating the Lac 50 (Main, East and Western Extension Zones), J4 and Ray deposits, which have been used in the generation of the mineral resource estimate.
The resource models are constrained within 3-dimensional domains representing the mineralized portion of the host mafic tuff and shear zones. Drill hole samples are composited to the full width of the zone and true thicknesses are determined for each drill hole intercept. At Lac 50, blocks in the model measure 5x5x5 metres in size whereas at J4 and Ray, blocks in the model are 5x3x3 metres. Only the portion of those model blocks within the mineralized domain is included in the final resource estimate. The method used for the estimation of U3O8 grade is ordinary kriging using length-weighted composited drill hole intervals. Estimates for Ag, Mo and Cu utilize the inverse distance weighting (ID2) interpolation method. Resource tonnages are calculated using a bulk density database containing 1,579 samples that were collected during the 2010, 2011 and 2012 drilling programs. Samples were composited to the full width of the mineralized domain and bulk densities at Lac 50 range from 2.35 t/m3 to 3.77 t/m3 with a mean of 2.85 t/m3. Bulk densities at J4 and Ray range from 2.52 t/m3 to 3.52 t/m3 with a mean of 2.84 t/m3. Estimates of bulk density were made using the inverse distance weighting (ID2) interpolation method. All mineral resources are classified in the inferred category. Model blocks are included in the inferred category if they form relatively continuous zones of mineralization within a maximum distance of 50 metres from a drill hole intercept.
Lac 50 is a basement hosted, vein-hydrothermal type, unconformity associated uranium deposit. The emplacement of uranium is structurally controlled, often associated with a graphite-chlorite tuffaceous metasediment interlayered in Archean metavolcanics. Mineralization consists of disseminated and patchy pitchblende with sulphides within fracture controlled, brecciated, hematite-quartz-carbonate veins that can occur in either the host shear or tuff unit. The deposit is comprised of three distinct mineralized sections occurring over 3.8 kilometres of strike length and interpreted to be off-set by faults. The central “Main” Lac Cinquante zone is the largest, measuring 1.4 kilometres in drilled length, striking at an azimuth of 115 degrees and dips to the SSW at roughly -65 degrees. The “Western Extension” is a 120 metre left-lateral displacement of the Main zone. The Western Extension has a drilled strike length of approximately 550 metre, is oriented at 125 degrees azimuth and dips to the SSW at -70 degrees. The “Eastern Extension” is interpreted as a 250 metre left-lateral displacement of the Main zone with a strike of 122 degrees azimuth, a -78 degree SSW dip and an overall drilled strike length of approximately 550 metre. The true thickness of the mineralized domain varies from 5 centimetres to a maximum of 13.5 metres with an average thickness of 2.2 metres.
Drilling in 2011 significantly increased the known strike of the Western Extension to 550m, encompassing anomalous hole 10 LC- 013 drilled in 2010 (See June 24, 2010 news release). Based on recent drilling, the zone of radioactivity that comprises the Western Extension starts 450m to the west and along strike of the Lac 50 main zone, occupying the entirety of the conductive trend identified by 2010-2011 ground VLF-EM surveys.
2012 drilling at the Western Extension tested below the current Lac 50 resource area. Thirteen diamond drill holes from seven sites intersected the host shear zone using 100m hole spacing. Of these, seven intersected anomalous uranium, outlining southwest plunging mineralization, including the deepest uranium intercept on the property to date at 365m (hole 12-LC-007: 0.33% U₃O₈ over 3.1m). This work confirmed this radioactive shear zone up to 2.7m estimated true width, and dipping roughly 65 degrees to the southwest.
The discovery of the Eastern Extension Zone was initially made by testing a northwest trending linear VLF EM conductor similar to Lac 50, using six reverse circulation (RC) holes drilled from three set-ups. Two diamond drills were then deployed to delineate the Eastern Extension, with 6,143m in 44 holes drilled from 13 set-ups spaced on 50m drill sections.
The Eastern Extension has a drilled strike length of 550m and starts approximately 400m to the east, and along strike, of the Lac 50 Main Zone resource area. Mineralization is very similar to that found at Lac 50, primarily hosted in the same hematite-carbonate-chlorite-graphite altered tuff unit. Uranium is associated with quartz-carbonate veining, breccia and sulphides within the sheared host rock.
All holes in 2011 were drilled to the northeast with azimuths bearing 26 degrees, at inclinations between minus 45 and 90 degrees. 37 of 44 holes intersected uranium mineralization between 34 and 257m vertical depth. Both RC and diamond drilling have confirmed the continuation of the Lac 50 structure eastward with uranium mineralization occurring in a zone dipping roughly 72 degrees to the southwest.
Drilling in 2012 tested the gap between the Eastern Extension and the Lac 50 Main Zone. Four holes were drilled from two sites spaced 50m apart. Of these, one hole (12-LC-001) intersected a radioactive, brecciated tuff at 82m vertical depth, having a peak of 7000 counts per second (cps) over 0.4m. This hole extends known mineralization at the Eastern Extension by 50m westward.
Zones of Lac 50 Trend
The J4 Zone is a one km long EM conductor located roughly 2.3km east of the Lac 50 Trend Deposit and about 300m north of the Ray Zone. Drilling in 2012 to date has tested 800m of this EM trend from 18 sites using 50-100m drill spacing. Anomalous radioactivity was encountered in 39 out of 46 core holes and initial high grade assay results for the first three holes were reported August 27, 2012. Delineation drilling along strike at J4 will continue until the end of the 2012 program.
J4 uranium mineralization is hosted by one or two sub-parallel mineralized horizons, 10 to 45m apart, referred to as the J4 Upper Zone and the J4 Lower Zone. The J4 has been intersected at depths between 35 and 371 vertical metres. Radioactivity occurs in quartz-carbonate veins hosted by sheared sulphidic, graphitic tuff within a larger sequence of basalt. Radioactive readings between 170 and a peak of 60,200 cps were measured over drill core lengths between 0.3 to 6.1m. Significant copper, molybdenum and silver values are also associated with uranium mineralization.
The Ray Zone is a subtle southeast trending EM conductor situated 2km along strike and southeast of the Lac Cinquante’s Eastern Extension and 300m south of the J4 Zone. Mineralization consists of a narrow sulphidic graphitic tuff horizon, similar to the same unit hosting mineralization at the Lac 50 Trend deposit.
Anomalous uranium mineralization was intersected in eight of nine holes from three drill sites along 310m of strike length, between vertical depths of 41m and 146m. Mineralization was encountered over 0.3 to 1.7m true width, with highlights being 0.51% U₃O₈, 96.0 g/t Ag and 0.75% Mo over 0.4m and 0.35% U₃O₈, 15.3 g/t Ag and 0.35% Mo over 1.6m. For 2012 assay results see news release August 27, 2012. Additional drilling at the Ray Zone in 2012 is warranted.
The Blaze Zone has been drilled across a strike length of 100m, with significant mineralization intersected between 30 and 126 metres depth below surface. A total of 2,694m in 19 drill holes drilled in 2011 have investigated mineralization at Blaze. Fifteen holes were drilled at azimuth 35 degrees from five locations at 25m drill section intervals. However, core logging suggests initial setups may have drilled subparallel to some of the mineralized trends and therefore, two additional setups were drilled oblique and perpendicular to earlier holes in order to determine structural controls and estimate true widths of mineralization.
Most notable is hole 11-BZ-016, which intersected 0.63% U₃O₈, 1.31% Cu, 74.3 g/t Ag and 0.35% Mo over 5.6m. This hole crosscuts hole 11-BZ- 010 assaying 1.01% U₃O₈ over 25.4m (See news release from June 20, 2011), and suggests the true width of this intercept to be roughly 4m. In addition, hole 11-BZ-017 intersected 0.45% U₃O₈, 0.30% Cu, 73.3 g/t Ag and 0.31% Mo over 8.36m; and hole 11-BZ-019 returned 0.60% U₃O₈ over. The relationship of these holes to other high grade intercepts are unknown at this time.
The Spark zone is located approximately 500 metres west of the high-grade Blaze zone. Six of seven RC and a single diamond drill hole intersected anomalous radioactivity at variable depths down to 65 metres vertically.
Mineralization is hosted in altered basalt on the upper contact of a narrow laminated tuff unit. 11-BZ3-001 was drilled to follow up on anomalous radioactivity indicated by 4 out of 8 RC test holes targeting the center of the BZ3 anomaly.
Pulse is a three km long EM conductor located roughly 700m north of the Lac 50 Trend Deposit. 27 holes drilled in 2012 tested 1.3km of this three km long EM trend. Intermittent uranium mineralization, that includes significant copper, molybdenum and silver values, is hosted in narrow carbonate-quartz-hematite veins in steeply dipping sheared basalt or sulphidic tuff. Drilling was from nine sites with varying spacing along strike and to a maximum depth of 170m. Anomalous uranium was encountered in 14 of 27 core holes, with most notable results being 0.39% U₃O₈ and 1.16% Cu over 0.7m and 0.14% U₃O₈, 6.24% Cu, 47.8 g/t over 1.3 m. For 2012 assay results see news releases July 25 and August 27, 2012.
The full three km strike length of the Pulse EM conductor has not been tested and further drilling is warranted, especially to the southeast where it trends into the Ray and J4 Zones.
The is a 4.5km long, southeast striking area locally scoured by glacial outwash, hosting sheared and faulted volcanics, with vein controlled mineralization.
The trend coincides with a 4.5km long geophysical conductor, analogous to the Lac 50 Main Zone which is located five km to the west of Joule. Historic work includes the discovery of a 12 lbs pitchblende boulder and four short drill holes within the trend. Most of the 2010 work encountered narrow widths (<50cm) of strong uranium mineralization, however mineralization styles and grades show similarities to Lac 50. The trend is also situated just 2.5km west of Kivalliq’s main “Nutaaq Camp” site. Several RC drill holes were completed in the Joule Valley in 2011, but to date no significant mineralization has been encountered below surface.
The Nine Iron Trend was initially recognized during the 2011 prospecting program while investigating historic reports of mineralized showings in the area. Discontinuous high-grade U-Cu-Mo-Ag mineralization was identified in samples taken from multiple veins (1 to 3 cm wide) occurring in outcrop and sub-crop over three kilometres of strike length. Assay results from prospecting include 13 of 25 grab samples exceeding 1% U3O8 and 5 samples with over 15% U3O8 (see news release dated January 12, 2012 - formerly BIF Zone). These results prompted ground geophysical surveying and geological mapping which revealed a southwest-trending magnetic anomaly that coincided with both prospecting results and a 10 kilometre by one kilometre belt of Archean aged metasedimentary rocks. The magnetic trend and host rocks sit on the southeastern flank of the Yathkyed Greenstone Belt and trend westward below an unconformable contact with the Proterozoic age Angikuni Basin.
Of note is a new native silver occurrence discovered approximately 7.5 km east of the Lac 50 Trend uranium deposit. Carbonate and quartz veins in a sheared tuff unit contain significant Ag values ranging from 10 to 301 g/t in 14 of 21 grab samples, with 21,600 g/t in one grab. The veins appear to be barren of uranium, but can contain significant concentrations of Cu, Pb, and Zn. Mineralization and veins are exposed over 65 m strike length, with a width of approximately one metre. To date, only one discontinuous high-grade Ag vein has been identified, but it is situated at the end of a 1 km long VLF-EM conductor which could host additional Ag and polymetallic veins. A single 80 m long inclined drill hole (11-AG-001) tested the western end of the VLF-EM conductor with no significant results.
The Force trend is underlain by gneissic rock and mafic schist situated central to the property. Mineralization is found as very radioactive mudboils and subcrop which likely represent structurally controlled, uranium bearing hematite breccias and veins just below surface. Sample # 14984 returned assay values of 21.40% U3O8, 1.12% Cu and 1980 g/t Ag. Ground VLF-EM surveys in 2011 delineated two moderate conductors in the area. Limited RC drilling in 2011 failed to intersect significant mineralization below surface, though the conductors have not yet been properly tested.
In late summer, prospectors investigated a prominent 2 km by 10 km magnetic geophysical feature just north of the Angilak property boundary. Ten claims were staked over this ovoid signature which could represent a large, high-level subvolcanic intrusion with associated mineralization. Follow-up work resulted in the discovery of disseminated and stockwork base metal mineralization in syenitic boulders and outcrop, now named the “Taluaq” zone. Assay results from 4 grab samples have elevated concentrations of Cu (0.06%-0.69%), Pb (0.14%- 4.95%), Zn (0.04%-3.3%), and Ag (1.2-110 g/t). Although no uranium was encountered, only a fraction of the magnetic anomaly has been investigated and future work will focus on assessing the uranium and REE potential, as well as polymetallic mineralization in the syenitic intrusion.
The VGR trend is located approximately 25km northwest of Lac 50, just inside the Yathykyed sub-basin. Previous operators performed geological, geophysical, and geochemical work between 1977 and 1981, but did not drill test this target. The trend hosts a three to seven m wide, steeply-dipping carbonate/hematite vein and fracture system hosting radioactivity and sulphide mineralization in trachytic volcanic flows and arkosic sandstone. Radioactive boulders and carbonate vein material can be traced for over 4000m, making the VGR trend an excellent target for unconformity-type and/or vein-hosted mineralization. Sample # 14766 returned assay values of 3.64% U3O8 and 2040 g/t Ag. This zone warrants testing with a diamond drill rig.
The Yat area is located 15.6km SW of Lac 50 near the northern margin of the Angikuni sub-basin. The trend comprises a 100m long string of sulphide-bearing and radioactive subcrops in conglomerate and sandstone. A grab sample collected in 2007 returned 39g Au, 100 ppm Ag, 1.18% Cu, and 0.24% U3O8 from brecciated quartz –carbonate veined float and trenches. Samples collected in 2010 confirmed and improved on these values, including sample # 14787 with 1.44% U3O8, 1140 g/t Ag, and 12.90 g/t Au. A strong magnetic low underneath the mineralized zone may indicate the presence of a buried alkaline intrusion beneath the clastic cover. An explosive breccia outcrop east of the mineralized trend indicates that alkaline magmas were locally emplaced at shallow levels into wet, unconsolidated sediments, which may have provided a significant driving force for mineralizing hydrothermal fluids in the area. The YAT area saw limited RC drill testing in 2011, but has not yet returned significant radioactivity below surface.
Uranium mineralization was identified along 200m of an EM conductor located roughly 300m southwest of, and parallel to, the Western Extension of Lac 50. Six of 11 holes drilled from four sites intersected anomalous uranium in a zone between 65 to 148m vertical depth, in host geology similar to Lac 50. The most notable assays over a zone 0.3 to 1.2m true width were 0.80% U₃O₈, 0.45% Cu, 32.5 g/t Ag over 1.2m and 0.35% U₃O₈, 0.16% Cu and 13.9 g/t Ag over 0.4m. Radioactive readings between 200 and a peak of 28,350 cps were measured over 0.3 to 2.8m width down hole. For 2012 assay results see news release August 27, 2012.
The Dipole prospect is located 27km SW of Lac 50, in a NE-trending belt of metavolcanic rocks which are interpreted to be equivalent to the sequence that hosts the Lac 50 Trend Deposit. Although the area is mostly covered by swampy till, prospecting in 2011 uncovered several highly mineralized and altered angular boulders on the shore of a small lake. Alteration is characterized by intense hematization and carbonate veining associated with strong hydrothermal brecciation, and is comparable to that observed in Lac Cinquante drill core. Grab samples from the area returned up to 2.24% U3O8, 0.94% Mo, and 116 g/t Ag. The high grades and metallic signature of these samples is comparable to Lac50 mineralization. A VLF-EM survey completed over the area in late 2011 outlined a very strong conductor extending at least 1.7km, which may be associated with a subsurface graphite-sulfide tuff unit. The strength of the conductor and the presence of coincident surface mineralization combine to make the Dipole area a high-priority drill target for the 2013 season.
The Forte area lies three km west of the Blaze, near old trenches in radioactive conglomerate and mafic volcanic rock. However, the area to the north was not well explored and was found to contain mineralized float and bedrock in carbonate veins hosted by tuff and metabasalt. Sample # 14553 returned assay values of 3.07% U3O8, 0.94% Cu and 102 g/t Ag. Ground VLF-EM surveys in 2011 delineated a strong VLF conductor coincident with the contact zone between an Archean granitoid intrusion and metavolcanic rocks. This area has yet to be drill tested.
The PWR area is located 7.3km due north of Lac 50 in mixed gneissic rocks. Two old trenches expose high grade pitchblende-Cu sulphide veins at the contact between mafic and granodioritic gneiss. A zone of highly radioactive veinlets one to five cm in wide host are surrounded by hematite alteration. Magnetics suggest PWR may be related to regional deformation along a structure. Sample # 14593 returned assay values of 14.4% U3O8, 1.29% Mo and 135 g/t Ag. Ground VLF-EM surveys in 2011 delineated a moderate conductor in the area which has not yet been drill tested.
The Lucky Break area is a showing discovered in 2010. The area is situated 11.3km NW of Lac 50. Outcrop exposure is minimal in the immediate area, but several highly radioactive polymetallic sulphide and pitchblende in quartz-carbonate breccia veins were recovered from boulders and subcrop beneath 30-60cm of till cover. Sample # 14978 returned assay values of 4.53% U3O8, 2.62% Cu and 78 g/t Ag. Two moderate to strong conductors identified by 2011 VLF-EM surveys have not yet been drill tested.
The Bog trend is located in sheared and faulted basement gneiss intruded by trachytic dykes and diatremes of the Christopher Island Formation, 14.5km northwest of Lac 50. Previous operators delineated a major regional-scale, SW-trending crustal break, which was not drill tested. Radioactive outcrop, subcrop, and frost heaved boulders are found along a three km of strike length, in an area largely covered by till. Uranium and sulphide mineralization seems to be controlled by shear/fracture structures and alteration related to dykes intruding granodioritic gneiss. Sample # 14830 returned assay values of 1.42% U3O8, 2.12% Cu and 70 g/t Ag.
2010 Prospecting Results
© Copyright 2008 Kivalliq Energy Corp.