Publications

Average heat flow values on several Tertiary Basins of Western Indonesia. i.e. tlie North Sumatra Basin, South Sumatra Basin, Northwest Java Basin and the Northeast Java Basin fall in a range of 1.95 +- 0.25 - 2.58 +- 0.21 u Cal/cm2. s. except on the Central Siimatra, Basin where heat flow value is about 3.27 +- 0.93 u Cal/cm2 s. It appears that discrepancies in geological and geophysical cliaracteristics between each region. are also demonstrated by variation in heat flow values as exemplified by the Sumatra and Java basinal areas.In general, less variabilitj. of heat flow is observed in Java Basinal Areas than those observed in Suniatra basinal areas. The lowest variability occurs in tlie South Stiiiiatra Basin, whereas the largest one take places in the Central Sumatra Basin. This variability probably i-etlccts variiition in the aniuiint of extension wliicli has occurred in each basin, which in turn has played an important role in basin hydrocarbon potential.