PROCEEDINGS JCM MAKASSAR 2011
The 36th HAGI and 40th IAGI Annual Convention and Exhibition
Makassar, 26 – 29 September 2011
Trace of the Translated Subduction in Central Java and its Role on the Paleogene Basins and Petroleum System Development
Cipi Armandita1, Awang Harun Satyana1, M. Ma’ruf Mukti2, Indra Yuliandri 3
2 Geoteknologi LIPI
3 Pertamina EP
Pamanukan Cilacap Fault Zone (PCFZ), which oriented in NW-SE (Sumatran Trend) has been interpreted to become barrier between Neogene deep water basins in western and central Java, BogorBasin and NorthSerayuBasin, respectively. PCFZ also controlled the development of the intra-arc transtensional deep water basin, and the distribution of the volcanoclastic Halang Formation. The PCFZ has been interpreted to have translated the eastern extension of SW-NE pre-Tertiary subduction zone ±200 km to the southeast. These tectonics models suggest that the prolific hydrocarbon zone associated with Sundaland, originally developed to the east of the Northwest Java Basin (NWJB) has been translated to the southeast along the PCFZ. The PCFZ is interpreted as a regional fault which controlled the N-S transtensional pull-apart Paleogene basins in NWJB. The PCFZ is likely to be part of the dextral Malacca strike-slip fault which controlled the development of the Paleogene basins in Sumatra. This regional tectonic reconstruction can be a possible alternative model to explain the distribution of numerous hydrocarbon seep in the Neogene deep water North Serayu and Banyumas basins with enigmatic origin in petroleum system, differed with the adjacent BogorBasin to the west which shows no hydrocarbon seeps.