Fjordland Exploration

NexGen Energy Significantly Extends Mineralization in the A2 and A3 Shears to the Northeast

VANCOUVER, Feb. 23, 2017 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX:NXE, OTCQX:NXGEF) is pleased to report the first results from the 35,000 m winter 2017 drilling program at our 100% owned, Rook I property, Athabasca Basin, Saskatchewan.

Several drill holes have intersected significant mineralization in previously untested areas located outside the maiden A2 and A3 resource grade shells of the Arrow Deposit to the northeast, including some of the most intense mineralization encountered in the A3 shear to date. 

Highlights:

A2 Shear Northeast Extension

  • Drill hole AR-17-119c1 has extended mineralization 120 m to the northeast of the maiden A2 resource grade shell intersecting 21.5 m of total composite mineralization including 1.15 m of total off-scale radioactivity (>10,000 to 53,000 cps) within a 95.0 m section (485.0 to 580.0 m).
  • Scissor hole AR-17-116c2 drilled 35 m northeast from the edge of the maiden A2 grade shell intersected 47.0 m of total composite mineralization including 3.05 m of total off-scale radioactivity (>10,000 to >61,000 cps) within a 111.0 m section (642.0 to 753.0 m).

A3 Shear Northeast Extension

  • Scissor hole AR-17-116c1 was drilled up-dip and northeast in a previously untested area approximately 45 m to the northeast boundary of the maiden A3 resource grade shell intersecting 64.0 m of total composite mineralization including 6.5 m of total off-scale radioactivity (>10,000 to >61,000 cps) within an 84.5 m section (425.5 to 510.0 m).
  • Scissor hole AR-17-114c2 intersected 54.0 m of total composite mineralization including 6.55 m of total off-scale radioactivity (>10,000 to >61,000 cps) within a 139.0 m section (437.5 to 576.5 m).
  • Scissor hole AR-17-118c1 intersected 55.0 m of total composite mineralization including 6.55 m of total composite off-scale radioactivity (>10,000 to >61,000 cps) within a 104.0 m section (571.5 to 675.5 m).

A2 High Grade Domain

  • Scissor hole AR-17-117c1 (25 m southwest and up-dip from AR-15-44b) intersected 72.0 m of total composite mineralization including 11.05 m of total composite off-scale radioactivity (>10,000 to >61,000 cps) within a 151.5 m section (461.0 to 612.5 m).
  • Scissor hole AR-17-114c2 (115 m northeast and down-dip from AR-15-44b) intersected 41.0 m of total composite mineralization including 7.35 m of total composite off-scale radioactivity (>10,000 to >61,000 cps) within a 109.0 m section (626.0 to 735.0 m).
  • Scissor hole AR-17-114c1 (87 m northeast and down-dip from AR-15-44b) intersected 77.0 m of total composite mineralization including 5.7 m of total composite off-scale radioactivity (>10,000 to >61,000 cps) within a 105.5 m section (607.5 to 713.0 m).

Arrow, Activities & Financial

  • The 2017 winter program comprising a minimum of 35,000 m of drilling with seven drill rigs is underway.
  • An updated NI 43-101 resource estimate on the Arrow Deposit is scheduled for the first half of 2017.
  • The Company has cash on hand of approximately $70 million.

The A2 and A3 long sections as well as a map showing drill hole locations are shown in Figures 1 to 3. Table 1 is a summary of the mineralized intervals.

Garrett Ainsworth, Vice-President, Exploration and Development, commented: "The objectives of the 2017 winter drill program are weighted towards expanding the area of mineralization at Arrow and subsequent infilling of the deposit. The first batch of results from the 2017 program have materially expanded the A2 and A3 shears to the northeast demonstrating continuity of these broad mineralized shears and include high grade sub-intervals. High grade sub-intervals in the A2 led us to discover the high grade A2 sub-zone. The northeast extension of the A2, the up-dip northeast extension of the A3 shear, and the southwest gap between Arrow and the 180 m southwest area are all high priorities given their growth profiles."   

Leigh Curyer, Chief Executive Officer, commented: "These initial 2017 results suggest the ultimate extent of Arrow is still in the early stages of definition. It's quite remarkable considering the maiden Inferred mineral resource estimate published in March 2016 ranks Arrow as the largest undeveloped uranium deposit in Canada. The updated resource estimate incorporating 2016 drilling at Arrow is on schedule for release in the coming months. The 2017 program will continue to aggressively test the boundaries of the known area of mineralization which, to date, have continually extended the boundaries of Arrow."

                                                                   Table 1: Arrow Deposit Drill Hole Data

     
Drill Hole Athabasca Group - Basement
Unconformity Depth (m)
Handheld Scintillometer Results (RS-120)
Hole ID Azimuth Dip Total Depth (m) From (m) To (m) Width (m) CPS Range
AR-17-114c1 327 -70 849.50 130.00 436.00 452.00 16.00 <500 -  11500
          454.50 456.00 1.50 <500 -  7000
          472.00 474.50 2.50 <500 -  12000
          482.00 489.00 7.00 <500 -  3500
          493.00 494.00 1.00 <500 -  960
          502.50 509.50 7.00 <500 -  52000
          514.00 517.50 3.50 <500 -  >61000
          532.50 533.00 0.50 <500 -  510
          607.50 608.50 1.00 <500 -  1900
          612.00 617.00 5.00 <500 -  3300
          623.50 640.00 16.50 <500 -  >61000
          645.50 678.00 32.50 <500 -  54000
          683.00 689.50 6.50 <500 -  5100
          692.00 695.50 3.50 <500 -  3700
          698.50 699.00 0.50 <500 -  14000
          701.50 713.00 11.50 <500 -  9900
          735.00 738.00 3.00 <500 -  530
AR-17-114c2 327 -70 823.50 130.00 437.50 438.00 0.50 <500 -  870
          441.00 443.00 2.00 <500 -  530
          453.00 456.50 3.50 <500 -  12000
          465.00 465.50 0.50 <500 -  13700
          471.50 472.00 0.50 <500 -  24000
          480.50 481.00 0.50 <500 -  1800
          485.50 486.50 1.00 <500 -  18000
          494.00 507.00 13.00 <500 -  33000
          510.00 517.50 7.50 <500 -  5500
          524.00 524.50 0.50 <500 -  2600
          529.00 531.00 2.00 <500 -  >61000
          534.50 535.50 1.00 <500 -  11000
          539.50 557.50 18.00 <500 -  >61000
          561.00 563.00 2.00 <500 -  760
          569.50 570.50 1.00 <500 -  1100
          576.00 576.50 0.50 <500 -  570
          626.00 628.50 2.50 <500 -  1200
          639.00 639.50 0.50 <500 -  560
          644.50 646.50 2.00 <500 -  4000
          679.00 680.00 1.00 <500 -  2800
          684.00 717.50 33.50 <500 -  >61000
          733.50 735.00 1.50 <500 -  7600
AR-17-115c1 327 -70 714.50 118.40 451.50 452.00 0.50 <500 -  1200
          459.00 460.00 1.00 <500 -  2200
          479.00 486.50 7.50 <500 -  6500
          524.50 525.00 0.50 <500 -  2600
          533.50 534.00 0.50 <500 -  1200
          536.50 537.50 1.00 <500 -  5700
          560.00 560.50 0.50 <500 -  510
          603.00 613.00 10.00 <500 -  40000
          615.50 619.00 3.50 <500 -  2700
          660.00 663.50 3.50 <500 -  2700
          674.50 675.00 0.50 <500 -  800
AR-17-115c2 327 -70 786.50 118.40 458.50 459.00 0.50 <500 -  1750
          465.00 465.50 0.50 <500 -  1820
          468.50 469.00 0.50 <500 -  1400
          495.00 496.00 1.00 <500 -  11000
          501.00 501.50 0.50 <500 -  13000
          517.00 520.00 3.00 <500 -  3500
          534.00 534.50 0.50 <500 -  760
          541.50 542.00 0.50 500 -  13000
          550.50 551.00 0.50 <500 -  18000
          572.50 573.00 0.50 <500 -  700
          580.50 582.50 2.00 <500 -  1670
          601.50 602.50 1.00 <500 -  800
          608.00 609.50 1.50 <500 -  5200
          613.50 621.50 8.00 <500 -  56000
          624.00 628.00 4.00 <500 -  22500
          632.50 633.00 0.50 <500 -  710
          635.50 640.00 4.50 <500 -  8200
          644.00 644.50 0.50 <500 -  4300
          649.50 655.50 6.00 <500 -  12500
          672.50 673.00 0.50 <500 -  740
          675.50 676.50 1.00 <500 -  5200
          698.50 700.50 2.00 <500 -  2200
AR-17-116c1 327 -70 879.50 132.00 425.50 429.00 3.50 <500 -  17000
          431.50 442.00 10.50 <500 -  15000
          449.00 461.00 12.00 <500 -  19000
          465.50 466.00 0.50 700 -  17000
          469.00 494.00 25.00 <500 -  >61000
          497.50 510.00 12.50 <500 -  24000
          605.00 607.50 2.50 <500 -  50000
          625.00 625.50 0.50 <500 -  1100
          636.00 637.50 1.50 <500 -  750
          659.00 661.00 2.00 <500 -  1100
          705.50 707.00 1.50 <500 -  700
          796.50 799.00 2.50 <500 -  950
          802.00 805.50 3.50 <500 -  1450
AR-17-116c2 327 -70 897.50 132.00 440.00 440.50 0.50 <500 -  2200
          444.00 445.50 1.50 <500 -  5300
          457.00 459.00 2.00 <500 -  6900
          485.00 485.50 0.50 <500 -  510
          489.00 493.00 4.00 <500 -  35000
          497.50 499.00 1.50 1200 -  53000
          518.00 519.00 1.00 <500 -  49000
          522.00 526.00 4.00 <500 -  6600
          532.00 532.50 0.50 <500 -  530
          537.50 540.00 2.50 <500 -  5800
          547.50 549.00 1.50 <500 -  1280
          566.50 568.50 2.00 <500 -  1700
          571.50 572.00 0.50 <500 -  1150
          578.50 580.00 1.50 <500 -  570
          642.00 645.50 3.50 <500 -  760
          663.50 670.00 6.50 <500 -  6900
          673.50 675.00 1.50 <500 -  2300
          678.50 682.50 4.00 <500 -  1700
          685.00 685.50 0.50 <500 -  860
          693.50 710.50 17.00 <500 -  >61000
          720.50 732.00 11.50 <500 -  41000
          734.50 735.50 1.00 <500 -  3700
          747.00 747.50 0.50 <500 -  870
          752.00 753.00 1.00 <500 -  2100
          860.50 861.00 0.50 <500 -  740
AR-17-117c1 327 -70 621.50 124.20 395.00 395.50 0.50 <500 -  530
          400.00 400.50 0.50 <500 -  1500
          407.50 409.00 1.50 <500 -  670
          418.00 418.50 0.50 <500 -  900
          427.00 427.50 0.50 <500 -  2100
          430.00 431.00 1.00 <500 -  600
          434.00 443.00 9.00 <500 -  1410
          446.50 447.50 1.00 <500 -  880
          451.00 454.00 3.00 <500 -  3000
          461.00 462.00 1.00 <500 -  1150
          467.50 478.00 10.50 <500 -  3400
          480.50 484.00 3.50 <500 -  2600
          490.00 496.00 6.00 <500 -  2100
          498.50 499.00 0.50 <500 -  680
          501.50 504.00 2.50 <500 -  700
          519.50 526.00 6.50 <500 -  2000
          529.00 529.50 0.50 <500 -  550
          533.50 561.50 28.00 <500 -  >61000
          564.00 568.50 4.50 <500 -  28000
          589.00 590.50 1.50 <500 -  1200
          605.50 612.50 7.00 <500 -  8100
AR-17-118c1 327 -70 873.00 129.90 463.50 464.00 0.50 <500 -  1100
          468.00 474.00 6.00 <500 -  1690
          537.00 543.50 6.50 <500 -  27000
          571.50 577.00 5.50 <500 -  19000
          585.50 586.00 0.50 <500 -  960
          600.00 600.50 0.50 <500 -  530
          603.50 604.00 0.50 <500 -  570
          607.00 612.50 5.50 <500 -  >61000
          616.50 617.00 0.50 800 -  26000
          619.50 622.50 3.00 <500 -  52000
          628.00 650.50 22.50 <500 -  >61000
          654.50 670.50 16.00 <500 -  9100
          675.00 675.50 0.50 <500 -  510
          695.00 697.00 2.00 <500 -  900
          700.00 713.50 13.50 <500 -  4000
          716.00 716.50 0.50 <500 -  650
          745.00 745.50 0.50 <500 -  620
          758.50 759.00 0.50 <500 -  1000
          838.50 840.00 1.50 <500 -  17000
AR-17-119c1 147 -67 825.50 119.50 354.00 357.00 3.00 <500 -  1700
  .       419.50 436.00 16.50 <500 -  9000
          456.00 456.50 0.50 <500 -  850
          462.50 471.50 9.00 <500 -  4300
          487.50 489.00 1.50 <500 -  3200
          504.00 506.00 2.00 <500 -  >61000
          509.50 510.00 0.50 <500 -  7800
          514.00 514.50 0.50 600 -  2900
          529.00 529.50 0.50 <500 -  540
          536.00 536.50 0.50 <500 -  900
          543.50 556.50 13.00 <500 -  48000
          559.00 560.50 1.50 <500 -  1250
          580.50 581.00 0.50 660 -  1600
          591.00 591.50 0.50 <500 -  510
          596.00 596.50 0.50 <500 -  540
          605.50 608.50 3.00 <500 -  2100
          613.00 613.50 0.50 <500 -  620
          617.00 621.00 4.00 <500 -  1050
          679.00 687.50 8.50 <500 -  35000

Parameters:

  • Maximum internal dilution 2.00 m downhole
  • All depths and intervals are meters downhole, true thicknesses are yet to be determined. Resource modelling in conjunction with an updated mineral resource estimate is required before true thicknesses can be estimated.
  • "Anomalous" means >500 cps (counts per second) total count gamma readings by gamma scintillometer type RS-120
  • "Off-scale" means >10,000 cps (counts per second) total count gamma readings by gamma scintillometer type RS-120
  • Where "Min cps" is <500 cps, this refers to local low radiometric zones within the overall radioactive interval

Arrow Deposit Drilling

AR-17-114c1

Hole AR-17-114c1 was a directional hole collared from the surface at an angled orientation (-70°) to the northwest (327° Azimuth). It was a scissor hole designed to test the A2 shear 15 m down-dip of AR-16-96c2 (4.17% U3O8 over 57.5 m in the A2 shear) and the A3 shear 25 m up-dip of AR-14-13 (1.08% U3O8 over 18.25 m, 1.31% U3O8 over 11.85 m and 5.35% U3O8 over 4.5 m in the A3 shear). Directional drilling was initiated at 201 m. The A2 and A3 shears were intersected at inclinations of -67° and -68°, respectively.

The hole intersected moderately bleached Athabasca sandstone between 112.3 m and the unconformity at 130.0 m. Basement lithologies dominantly consisted of semi-pelitic gneiss with intervals of graphitic pelitic gneiss (the A1 through A3 shears) including mylonite.  The hole successfully intersected anomalous to strongly anomalous radioactivity in the A1 through A3 shears in association with stringers, disseminated, foliation-controlled, fracture-controlled, and semi-massive to massive pitchblende mineralization. A total composite mineralization of 119.0 m was intersected over 302 m (436.0 to 738.0 m) including 8.75 m of off-scale radioactivity (>10,000 to >61,000 cps). In the A1 shear, 3.0 m of composite mineralization was intersected. In the A2 shear, 77.0 m of composite mineralization was intersected including 5.7 m of off-scale radioactivity. In the A3 shear, 39.0 m of composite mineralization was intersected including 3.05 m of off-scale radioactivity. The hole was terminated at a depth of 849.5 m.

AR-17-114c2

Hole AR-17-114c2 is a directional hole that departed pilot hole AR-17-114c1 at a depth of 346 m. The hole was designed to test A2 shear 42 m down-dip of AR-16-96c2 (4.17% U3O8 over 57.5 m in the A2 shear) and the A3 shear 10 m up-dip of AR-14-13 (1.08% U3O8 over 18.25 m, 1.31% U3O8 over 11.85 m and 5.35% U3O8 over 4.5 m in the A3 shear). Directional drilling was initiated at 361 m. The A2 shear was intersected at an inclination of -68°.

Basement lithologies were intersected beginning at the top of the hole and consisted largely of semi-pelitic gneiss to granofel and relatively narrow intervals of pelitic gneiss and mylonite (the A2 and A3 shears). Anomalous to strongly anomalous radioactivity was intersected in the A2 and A3 shears in association with stringers, disseminated, fracture-controlled, and semi-massive pitchblende mineralization. A total composite mineralization of 95.0 m including 13.9 m of off-scale radioactivity (>10,000 to >61,000 cps) was intersected within a 297.5 m section (437.5 to 735.0 m). In the A2 shear, 41.0 m of composite mineralization including 7.35 m of off-scale radioactivity was intersected. In the A3 shear, 54.0 m of composite mineralization including 6.55 m of off-scale radioactivity was intersected. The hole was terminated at 823.5 m.

AR-17-115c1

Hole AR-17-115c1 was a directional hole collared from the surface at an angled orientation (-70°) to the northwest (327° Azimuth). It was a scissor hole designed to test the A2 shear 80 m down-dip of AR-16-81c3 (17.19% U3O8 over 23.0 m in the A2 shear). Directional drilling was initiated at 300 m. The A2 shear was intersected at an inclination of -69°.

The hole intersected bleached and hematized Athabasca Group sandstones between 113.0 m and the unconformity at 118.4 m. Basement lithologies primarily consist of semi-pelitic gneiss with minor intervals of graphitic pelitic gneiss (the A2 and A3 shears). The hole successfully intersected anomalous to strongly anomalous radioactivity in the A2 and A3 shears in association with stringers, disseminated, foliation-controlled, and fracture-controlled pitchblende mineralization. A total composite mineralization of 29.0 m including 0.3 m of off-scale radioactivity (>10,000 to 40,000 cps) was intersected within a 223.5 m section (451.5 to 675.0 m). In the A2 shear, 17.5 m of composite mineralization including 0.3 m of off-scale radioactivity was intersected. An additional 11.5 m of composite mineralization was intersected in the A3 shear. The hole was terminated at a depth of 714.5 m.

AR-17-115c2

Hole AR-17-115c2 is a directional hole that departed pilot hole AR-17-115c1 at a depth of 309 m. The hole was designed to test A2 high-grade domains 110 m down-dip and southwest of AR-16-81c3 (17.19% U3O8 over 23.0 m in the A2 shear). Directional drilling was initiated at 324 m. The A2 shear was intersected at an inclination of -71°.

Basement lithologies were intersected beginning at the top of the hole and consisted largely of semi-pelitic gneiss to granofel and relatively narrow intervals of pelitic gneiss and mylonite (the A2 and A3 shears). Anomalous to strongly anomalous radioactivity was intersected in the A2 and A3 shears in association with stringers, disseminated, and fracture-controlled pitchblende mineralization. A total composite mineralization of 39.5 m including 2.65 m of off-scale radioactivity (>10,000 to 51,000 cps) was intersected within a 242.0 m section (458.5 to 700.5 m). In the A2 shear, 32.0 m of composite mineralization including 2.15 m of off-scale radioactivity was intersected. An additional 7.5 m of composite mineralization including 0.5 m of off-scale radioactivity was intersected in the A3 shear. The hole was terminated at 786.5 m.

AR-17-116c1

Hole AR-17-116c1 was a directional hole collared from the surface at an angled orientation (-70°) to the northwest (327° Azimuth). It was designed as a scissor hole to test A2 shear 30 m down-dip and northeast of AR-16-108c4 (0.92% U3O8 over 49.5 m in the A2 shear), and the A3 shear 70 m up-dip and northeast of AR-16-101c2 (0.67% U3O8 over 27.5 m and 2.79% U3O8 over 11.5 m in the A3 shear). Directional drilling was initiated at 201 m. The A2 and A3 shears were intersected at inclinations of -65° and -66° respectively.

The hole intersected bleached and desilicified Athabasca Group sandstones between 123.0 m and the unconformity at 132.0 m. Basement lithologies largely consist of semi-pelitic gneiss with narrow intervals of graphitic pelitic gneiss and mylonite (the A1 through A3 shears). The hole successfully intersected anomalous to strongly anomalous radioactivity in the A2 through A3 shears in association with stringers, disseminated, foliation-controlled, fracture-controlled, and semi-massive pitchblende mineralization. A total composite mineralization of 78.0 m including 6.7 m of off-scale radioactivity (>10,000 to >61,000 cps) was intersected within a 380.0 m section (425.5 to 805.5 m). In the A2 shear, 6.5 m of composite mineralization was intersected including 0.2 m of off-scale radioactivity. In the A3 shear, 64.0 m of composite mineralization was intersected including 6.5 m of off-scale radioactivity. An additional 7.5 m of composite mineralization was intersected in the A1 shear. The hole was terminated at a depth of 879.5 m. 

AR-17-116c2

Hole AR-17-116c2 was a directional hole that departed pilot hole AR-17-116c1 at a depth of 204 m. The hole was designed to test the A2 shear 86 m down-dip of AR-16-108c3 (1.85% U3O8 over 27.0 m in the A2 shear) and the A3 shear 30 up-dip and northeast of AR-16-101c2 (2.79% U3O8 over 11.5 m and 0.67% U3O8 over 27.5 m in the A3 shear). Directional drilling was initiated at 585.5 m. The A2 and A3 shears were intersected at inclinations of -70° and -69° respectively.

Basement lithologies were intersected beginning at the top of the hole and consisted largely of semi-pelitic gneiss to granofel and relatively narrow intervals of pelitic gneiss and mylonite (the A1 through A4 shears). Anomalous to strongly anomalous radioactivity was intersected in the A1 through A4 shears in association with stringers, disseminated, fracture-controlled, and foliation-controlled pitchblende mineralization. A total composite mineralization of 71.0 m including 4.6 m of off-scale radioactivity (>10,000 to >61,000 cps) was intersected within a 421.0 m section (440.0 to 861.0 m). In the A1 shear, 0.5 m of composite mineralization was intersected. In the A2 shear, 47.0 m of composite mineralization including 3.05 m of off-scale radioactivity was intersected. In the A3 shear, 19.5 m of composite mineralization including 1.55 m of off-scale radioactivity was intersected. An additional 4.0 m of composite mineralization was intersected in the A4 shear. The hole was terminated at 897.5 m.     

AR-17-117c1

Hole AR-17-117c1 was a directional hole collared from the surface at an angled orientation (-70°) to the northwest (327° Azimuth). It was a scissor hole designed to test the A2 shear between holes AR-16-62 (6.35% U3O8 over 124.0 m in the A2 shear) and AR-16-63c2 (15.20% U3O8 over 42.0 m and 12.99% U3O8 over 46.5 m in the A2 shear). Directional drilling was initiated at 261 m. The A2 shear was intersected at an inclination of -70°.

The hole intersected bleached Athabasca Group sandstones between 121.0 m and the unconformity at 124.2 m. Basement lithologies dominantly consist of semi-pelitic gneiss with relatively narrow intervals of graphitic pelitic gneiss and mylonite (the A2 and A3 shears). The hole successfully intersected anomalous to strongly anomalous radioactivity in the A2 and A3 shears in association with stringers, disseminated, foliation-controlled, fracture-controlled, and semi-massive to massive pitchblende mineralization. A total composite mineralization of 89.5 m including 11.05 m of off-scale radioactivity (>10,000 to >61,000 cps) was intersected within a 217.5 m section (395.0 to 612.5 m). In the A2 shear, 72.0 m of composite mineralization including 11.05 m of off-scale radioactivity was intersected. An additional 17.5 m of composite mineralization was intersected in the A3 shear. The hole was terminated at a depth of 621.5 m.

AR-17-118c1

Hole AR-17-118c1 was a directional hole collared from the surface at an angled orientation (-70°) to the northwest (327° Azimuth). It was a scissor hole designed to test the A2 shear 75 m down-dip of AR-15-53c3 (1.38% U3O8 over 24.5 m, 3.37% U3O8 over 8.5 m, and 1.87% U3O8 over 9.5 m in the A2 shear) and the A3 shear 28 m southwest of AR-16-105c1 (2.93% U3O8 over 23.5 m and 2.31% U3O8 over 11.0 m in the A3 shear). Directional drilling was initiated at 201 m. The A2 and A3 shears were both intersected at an inclination of -68°.

The hole intersected bleached Athabasca Group sandstones between 123.0 m and the unconformity at 129.9 m. Basement lithologies dominantly consist of semi-pelitic gneiss with relatively narrow intervals of graphitic pelitic gneiss and mylonite (the A2 through A4 shears). The hole successfully intersected anomalously to strongly anomalous radioactivity in the A2 through A4 shears in association with stringers, disseminated, foliation-controlled, fracture-controlled, and semi-massive to massive pitchblende mineralization. A total composite mineralization of 86.5 m including 7.3 m of off-scale radioactivity (>10,000 to >61,000 cps) was intersected within a 376.5 m section (463.5 to 840.0 m). In the A2 shear, 18.5 m of composite mineralization including 0.2 m of off-scale radioactivity was intersected. In the A3 shear, 55.0 m of composite mineralization including 6.55 m of off-scale radioactivity was intersected. In the A4 shear, 13.0 m of composite mineralization including 0.55 m of of-scale radioactivity was intersected. The hole was terminated at a depth of 873.0 m.

AR-17-119c1

Hole AR-17-119c1 was a directional hole collared from the surface at an angled orientation (-67°) to the southeast (147° Azimuth). The hole was designed to test the A2 shear 90 m up-dip and northeast of AR-16-108c4 (0.92% U3O8 over 49.5 m in the A2 shear). Directional drilling was initiated at 201 m. The A2 shear was intersected at an inclination of -64°.

The hole intersected bleached Athabasca Group sandstones between 93.0 m and the unconformity at 119.5 m. Basement lithologies dominantly consist of semi-pelitic gneiss with relatively narrow intervals of graphitic pelitic gneiss and mylonite (the A1 through A3 shears). The hole successfully intersected anomalous to strongly anomalous radioactivity in the A1 through A3 shears in association with stringers, disseminated, foliation-controlled, fracture-controlled, and semi-massive to massive pitchblende mineralization. A total composite mineralization of 66.5 m including 1.5 m of off-scale radioactivity (>10,000 to >61,000 cps) was intersected within a 333.5 m section (354.0 to 687.5 m). In the A1 shear, 29.0 m of composite mineralization was intersected. In the A2 shear, 21.5 m of composite mineralization including 1.15 m of off-scale radioactivity was intersected. An additional 16.0 m of composite mineralization including 0.35 m of off-scale radioactivity was intersected in the A3 shear. The hole was terminated at a depth of 825.5 m.

Technical Information

Natural gamma radiation in drill core reported in this news release was measured in counts per second (cps) using a Radiation Solutions Inc. RS-120 gamma-ray scintillometer. The reader is cautioned that total count gamma readings may not be directly or uniformly related to uranium grades of the rock sample measured; they should be used only as a preliminary indication of the presence of radioactive minerals. All intersections are downhole. True thicknesses are yet to be determined. Resource modelling in conjunction with an updated mineral resource estimate is required before true thicknesses can be estimated. 

Split core samples will be taken systematically, and intervals will be submitted to SRC Geoanalytical Laboratories (an SCC ISO/IEC 17025: 2005 Accredited Facility) of Saskatoon for analysis. All samples sent to SRC will be analyzed using ICP-MS for trace elements on partial and total digestions, ICP-OES for major and minor elements on a total digestion, and fusion solution of boron by ICP-OES. Mineralized samples are analyzed for U3O8 by ICP-OES and select samples for gold by fire assay. Assay results will be released when received and after stringent internal QA/QC protocols are passed.

All scientific and technical information in this news release has been prepared by or reviewed and approved by Mr. Garrett Ainsworth, P.Geo., Vice President – Exploration & Development for NexGen. Mr. Ainsworth is a qualified person for the purposes of National Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101"), and has verified the sampling, analytical, and test data underlying the information or opinions contained herein by reviewing original data certificates and monitoring all of the data collection protocols.

For details of the Rook I Project including the quality assurance program and quality control measures applied and key assumptions, parameters and methods used to estimate the mineral resource set forth below please refer to the technical report entitled "Technical Report on the Rook 1 Property, Saskatchewan, Canada" dated effective April 13, 2016 (the "Rook 1 Technical Report") prepared by Mark B. Mathisen and David Ross, each of whom is a "qualified person" under NI 43-101. The Rook I Technical Report is available for review under the Company's profile on SEDAR at www.sedar.com.

About NexGen

NexGen is a British Columbia corporation with a focus on the acquisition, exploration and development of Canadian uranium projects. NexGen has a highly experienced team of uranium industry professionals with a successful track record in the discovery of uranium deposits and in developing projects through discovery to production.

NexGen owns a portfolio of highly prospective uranium exploration assets in the Athabasca Basin, Saskatchewan, Canada, including a 100% interest in Rook I, location of the Arrow Discovery in February 2014 and Bow Discovery in March 2015 and the Harpoon discovery in August 2016. The Arrow Deposit's maiden Inferred mineral resource estimate is 201.9 M lbs U3O8 contained in 3.48 M tonnes grading 2.63% U3O8.

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