The uranium projects include the Thatcher Soak project, Bremer Basin project and Alligator Rivers project.
Total cash of A$20m will be paid within 90 days of 22 August, including a non-refundable deposit of A$500,000 ($523,250) received on behalf of the firm.
Uranex has also agreed to provide the investor with a first right of refusal in respect of any sale of any further tenements in Australia owned or acquired by Uranex.
Uranex managing director Matthew Gauci said that the agreement unlocks and realises the significant value in the Australian uranium Projects created by Uranex.
