The Hook-Carter property covers the northeastern end of the highly prospective Derkson, Carter and Patterson Lake structural and conductor trends, host to numerous uranium showings, deposits and recent discoveries. The Patterson Lake Corridor (“PLC”) hosts the Triple R uranium deposit (Fission Uranium Corp.), the Arrow uranium deposit, Harpoon, Bow and South Arrow uranium discoveries (NexGen Energy Ltd.), and the Spitfire, Hornet and Dragon uranium discoveries (a joint venture of Purepoint Uranium Group Inc., Cameco Corp., and Orano Canada Inc. ALX, in partnership with Denison Mines Corp., has the goal at Hook-Carter to explore for high-grade mineralization in this emerging uranium district in the southwestern Athabasca Basin.


  • Hook-Carter features between 250 and 700 metres of Athabasca Group sandstone cover overlying the basement rocks that define the prospective geological trends or corridors
  • Three prospective conductive corridors transect the property, two of which (Patterson Lake, Derkson) host known uranium deposits and uranium occurrences
  • Carter Lake Corridor remains untested
  • Numerous drill-ready targets based on historical and recent exploration
  • Prospective areas lie between widely-spaced historical drill holes up to 4.3 km apart
Click to see 2018 drill core photos


  • Located near the southwestern margin of the Athabasca Basin in northern Saskatchewan approximately 27 km east of Highway 955
  • Proximity to uranium discoveries, deposits, mills and mines, (approx.) 75 km southeast of the past-producing Cluff Lake uranium mine
  • 20 km (approx.) northeast of Fission Uranium’s Triple R (Patterson Lake South) uranium deposit
  • 13 km (approx.) northeast of NexGen’s Arrow deposit and Bow, Harpoon and South Arrow discoveries
  • 8 km (approx.) northeast of Cameco/Orano/Purepoint’s Spitfire, Hornet and Dragon discoveries

Property Description and Ownership

  • Hook-Carter consists of 24,229 hectares in 80 claims located approximately 375 kilometres (233 miles) northwest of La Ronge, SK
  • ALX owns a 20% interest after the November 2016 sale of an 80% interest to Denison Mines Corp. for 7.5 million common shares of Denison
  • Denison, as operator, has agreed to fund ALX’s share of the first $12.0 million in exploration expenditures – geophysical work was carried out in 2017, drilling totalling 6,960 metres in nine holes was completed in 2018 and further drilling is planned in winter of 2019

Recent Exploration

In 2017, Denison announced that its exploration plans included initial ground resistivity and electromagnetic surveying during the winter season.The completion of this geophysics generated several high-priority targets for drilling along the Patterson Lake Corridor.

The winter of 2018 brought on the first round of reconnaissance drilling by Denison.Four holes totaling 3,062 metres were completed.Results from the drilling included elevated radioactivity and zones of strong hydrothermal alteration in sandstone and basement lithologies.

In the spring of 2018, a second drilling program commenced and five holes totaling 3,898 metres were completed on high-priority geophysical targets.Results from the drilling included multiple prospective trends of strong hydrothermal alteration in sandstone and basement lithologies that are associated with graphitic basement structures.These features are consistent with unconformity-related mineralizing systems in Athabasca Basin uranium deposits and provide a strong indication of the continuation of the mineralizing system within the PLC onto the Hook-Carter property.

Prior to 2018, diamond drilling completed across the property totaled only 4,451 metres in eight historical drill holes.Since 2018, an additional 6,960 metres have been drilled and further drilling is being planned in the winter of 2019.

Historical Exploration

Uranium exploration in the vicinity of the Hook-Carter property has been recorded since 1969 by a large number of companies. Several major conductive trends were identified on the Hook-Carter property and neighbouring properties, including the Patterson Lake, Derkson and Carter Corridors. Significant past results on the current Hook-Carter property are as follows:

In 1996, Uranerz Exploration and Mining discovered through boulder sampling that the area north of Derkson Lake up to Carter Lake and along the Williams River was geochemically anomalous with elevated boron (dravite), kaolinite and chlorite.

In 1997, UEM Inc. and Cameco completed Fixed Loop Time-Domain Electromagnetic (FLTEM) and discovered several conductive trends, leading to a follow-up boulder sampling program. In 1998, the same companies completed additional ground EM surveys and a larger airborne GEOTEM survey.

Several Hook-Carter claims were drill tested between 1999 and 2003 by Cameco Corporation with a total of six drill holes. Several holes displayed criteria favourable to unconformity uranium deposits with anomalous clay alteration, quartz dissolution, Athabasca Group and basement structure and/or anomalous geochemical enrichment.

Between 2005 and 2007, ALX's predecessor company, ESO Uranium Corp., carried out airborne EM surveys, ground resistivity and diamond drilling. PIMA (infra-red spectroscopy) analyses performed on drill core from the 2007 drilling were re-evaluated in 2013. This work identified important clay alteration minerals including sudoite (chlorite), dravite, smectite/illite, sericite, and probable carbonate. In addition, anomalous values of pathfinder elements including nickel, copper, silver, tungsten, and mercury were returned from samples of Athabasca sandstone, which along with the dissolution and silicification noted in drill logs provide evidence of hydrothermal alteration.

Alpha Exploration Inc. (a predecessor to ALX) engaged CGG Aviation (Australia) Pty Ltd. of West Perth, Australia to perform a FALCON® airborne gravity gradiometer gravity survey in late 2014, which included magnetic and laser scanning digital elevation components: 987 line-km were flown at 200-metre line spacing covering a grid area of approximately 10 x 14 km. The survey provided important gravity and magnetic data for integration with known geology and drill hole information.

In 2016, ALX completed a Sub-Audio Magnetic Transient Electromagnetic (HeliSAM TEM) geophysical survey conducted by Gap Discovery Geophysics.The survey provided a total of 115 line-km and confirmed the presence of multiple basement conductive units within the Carter Corridor where it crosses the Property.