Palinpinon

The Palinpinon geothermal production field lies on the northern flanks of inacative Cuernos de Negros volcano (1,837 m ASL). This volcanic complex is part of the Negros Arc which is a north-south trending chain of Quaternary volcanoes formed as a result of the eastward subduction of the Sulu Sea oceanic crust along the Negros Trench.

The arc comprises the stratocones of Silay, Mandalagan and Canlaon in Negros Occidental and the coalescing volcanic complexes of Guinsayawan and Cuernos de Negros in Negros Oriental. Palinpinon is located about 12 kms west of Dumaguete City.

It is centered in the northeast-trending Okoy river valley where the numerous hot springs and surface thermal manifestations occur. Schlumberger resistivity and Vertical electric sounding delineated a low resistivity anomaly in the Okoy river valley. Exploration drilling within this anomaly led to the discovery and eventual development of Palinipinon geothermal field.

The 112.5 MW Palinpinon-1 steamfield consists of the Puhagan production sector and the Malaunay and Ticala reinjection blocks. Palinpinon-2, producing 80 MW, covers the production and reinjection sectors in Sogongon, Nasuji and Balas-balas.