Academic journal article Borneo Research Bulletin

The Evolution of the East Java Basin, Indonesia

Academic journal article Borneo Research Bulletin

The Evolution of the East Java Basin, Indonesia

Article excerpt

The East Java Basin has a geological life span of more than 50 Ma, with a diverse structural and stratigraphic development history. The basin originated during the Eocene on continental crust and developed northeast to southwest trending linear paleo-highs at its inception. These antiformal uplifts are cored by contractional structures, but also exhibit minor crestal extension. The parallel and convex paleo-highs are separated at a spatial wavelength of 80-100 km. The well and sediment information is recorded and evaluated herein as subsidence histories. By coupling the convex profiles from geohistory information with low heat flows recorded in well bottomhole temperatures, the evidence points to an origin of lithospheric flexure and buckling of the continental crust. The stratigraphy documented in well and outcrop samples indicates a preponderance of shelfal carbonate deposits with an influx of quartz sandstone during the Miocene. The quartzite source is north of the basin in Borneo associated with an exposed granite massif.

Only Pliocene-Recent sediments (<5 Ma) are sourced from adjacent volcanic eruptions to the south. In contrast to previous studies where rifting is proposed as the mechanism for basin initiation, the evidence uncovered in this research points to crustal buckling of continental crust as the correct mechanism. …

Search by... Author
Show... All Results Primary Sources Peer-reviewed

Oops!

An unknown error has occurred. Please click the button below to reload the page. If the problem persists, please try again in a little while.