The pay-out was triggered after Andolu defined a JORC-compliant resource estimate of 348,150 ounces gold and 2.83mln ounces of silver at the Karaağaç project in Turkey.
Oriole will receive US$25,000 a month for the next 20 months. The first payment has already been perceived.
“We are delighted that Anadolu have progressed the licence to a point where the success-based payment has been triggered and to see a significant uplift in the defined resource,” said chief financial officer Bob Smeeton.
“We have now reached a commercial arrangement with them to receive the payment over a period that suits both parties.”
He added: “This agreement is further evidence of the success of Oriole's self-funding exploration strategy that has been applied throughout our portfolio.”
Oriole transferred the Karaağaç licences to Andolu back in 2015 in return for a commitment by Andolu to spend up to US$1.5mln on exploration and drilling at the project.
AIM-quoted Oriole has been managing the exploration and drilling programmes throughout – at Anadolu's cost – and retains a 1.5% net smelter royalty on any future production.
Shares were unchanged at 0.37p at the opening bell on Monday.