Proccea has also committed to another US$2.1mln to take its final stake to 50%.
The Turkish firm is building the gold mine at Kiziletpe for the venture and will soon be start to draw on the US$33mln construction finance facility in place.
Production is expected to start in the second half of 2016.
Kerim Sener, Ariana’s managing director, said construction at Kiziltepe was making excellent progress.
To date, Proccea has spent approximately US$5.9mln on the joint venture since its inception in August 2010.
It has to spend US$8mln on the project to earn-in to 50% of the joint venture.
Ariana shares reased 2% lower to 1.12p.