The Makassar Strait is subject of debate, because uncertainity for determine age and mechanism of formation this strait. Makassar Strait is affected by tectonic activity since Pre-Tertiary Tectonic, a old subduction path, In Java it is correlate with Karangsambung, Ciletuh, and Bayat. Basement of Makassar Strait is the southeastern edge of Sundalan. Convergent interaction from the Australian micro continent is affected the basement. Compressional activity at this time, trending NW-SE resulting Paternosfer Fault and Palu-Koro transform Fault. The fault in this area is controlling the configuration the old basin. The opening of Makassar Strait at Eocene-Recent with 2500m depths in present day resulting two basin of this area. North Makassar Basin and South Makassar Basin is separated by Paternosfer Fault. Nowadays, Makassar Strait is the oil and gas target exploration. The unique geological condition on this area and hydrocarbon proven, especially on the western side of the North Makassar Straits. There is the Mahakam Delta with Kutai Basin, the largest and deepest basin in Indonesia and one of the richest hydrocarbon provinces in Indonesia. The frist deep-water production of oil and gas in Indonesia came from eastern edge of the Kutai Basin, on the western side of the Makassar Straits, at the foot of the Mahakam Delta. Mahakam Delta probably is estimated as source sediment of basin in Makassar Strait.
Author : R. Amanda, Y. B. Panggabean, A. Rahmawanto, A. W. Prasetya