[4][5][6] The Dékou-Dékou Mountains form an east–west ridge consisting of two plateaus separated by a little hill.

[8] The Lucifer Mountains rise to more than 500 metres (1,600 ft), and form a vast plateau covered in forests which are home to many rare species.

272 species have been identified and include the golden-olive woodpecker, the white bellbird and the blue-backed tanager.

Emmanuel Macron distanced himself from the project in 2019,[11] however the battle has moved to the courts, and is as of February 2021 ongoing.

[12] The debate about whether the project can continue, has attracted garimpeiros, illegal gold miners, to the area.