Rook I

NexGen is a well-funded exploration and development company with a portfolio of high-impact projects across the Athabasca Basin. Its portfolio is centered in the large-scale southwestern Athabasca Basin where NexGen holds over 259,000 hectares of land. NexGen's southwestern properties host the high-grade Arrow deposit (made February 21, 2014), the South Arrow discovery (made July, 2017) the Harpoon discovery (made August, 2016), the Bow discovery (made March, 2015) and the Cannon area (discovered April, 2016) all located on the Company's 100% owned Rook I property.

NexGen is led by a team of experienced uranium industry professionals with expertise in exploration, corporate finance and mine development.

Arrow Deposit, Rook I: 

The 100%-owned Rook I project hosts the land based Arrow deposit which has an Indicated mineral resource estimate of 179.5Mlbs U3O8 contained within 1.18Mt grading 6.88% U3O8 including a high-grade core of 164.9Mlbs U3O8 contained within 0.40Mt grading 18.84% U3O8 and an Inferred mineral resource estimate of 122.1Mlbs U3O8 contained within 4.25Mt grading 1.30% U3O8 (see the Company's technical disclosure statement: http://www.nexgenenergy.ca/corporate/corporate-governance/). The deposit was based on only 200 drill holes and the Arrow deposit has a defined area of mineralization of 895 m x 308 m, depth starting at 110 m down to 980 m and remains open in most directions and at depth.

South Arrow Discovery, Rook I

South Arrow was discovered in July 2017, and is located 400 m South of the Arrow Deposit. High grade uranium mineralization occurs as accumulations of semi-massive to massive pitchblende similar to that seen in the High Grade Domains of the Arrow Deposit. Aggressive step out drilling has intersected significant off-scale radioactivity in multiple holes, and has extended the strike length and vertical extent of high grade mineralization to 290 m and 185 m, respectively. 

Harpoon Discovery, Rook I: 

The Rook I project hosts the recentlis land based and is defined by strong visible uranium and dense accumulations of massive to semi-massive pitchblende mineralization. Combined with Arrow, uranium occurrences along trend have now been identified over a mineralized strike length of 5.6 km all within the Rook I project.

The Harpoon Discovery is located on a Rook I internal mineral disposition (northeast of green dashed line in Figure 1) which is subject to a 2% net smelter return royalty (the “NSR”) of which 1% can be repurchased by the Company for $1 million which is held by Advanced Royalty Corp. In addition, Harpoon is subject to a 10% production carried interest held by Rio Tinto Uranium Corporation (“Rio Tinto”) which provides Rio Tinto with a right to 10% of potential future production provided Rio Tinto pays NexGen their 10% pro rata portion of the collective expenditure from June 20, 2005.

Bow Discovery, Rook I

Rook I also hosts the Bow discovery which is located 3.7 km northeast of Arrow. Bow is a prospective target which has planned near-term drilling to be conducted on it. Holes at Bow will target step-outs from known mineralization as well as coincident VTEM and radon in lake water anomalies, and structural traps interpreted from previous drilling and geophysical surveys.

Athabasca Basin

IsoEnergy Ltd.

NexGen holds a 64% interest in IsoEnergy Ltd. (www.isoenergy.ca) which holds a highly prospective portfolio of Eastern Athabasca Basin properties that include Thorburn Lake (7 km from Cigar Lake) and the Radio Project (adjacent to Roughrider deposit).