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Remote Sensing and Gravity interpretation ofNW Borneo: Integrated Basin Analysis on a GIS platform

Hakimi, Harris Saifi (2008) Remote Sensing and Gravity interpretation ofNW Borneo: Integrated Basin Analysis on a GIS platform. Masters thesis, Universiti Teknologi Petronas.

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Abstract

Geographic Infonnation System (GIS) and remote sensing were applied and used to study the geological evolution of the sedimentary basin of NW Borneo. For this study, Landsat, SRTM, bathymetry and satellite derived gravity data were integrated, manipulated and visualized in a GIS platfonn by using the capabilities of the GIS software. The onshore region was studied by perfonning lineament interpretation using Landsat images and SRTM data, whereas in the offshore region bathymetry and gravity data were used to study the lithosphere of the region by gravity modelling. Lineament interpretation was done by using maps that were generated from the SRTM data (e.g. hillshade and contour maps) viewed concurrently with the Landsat images. Using the GIS tools, gravity and bathymetry data of offshore NW Borneo were extracted to study the lithosphere of this region. The area studied crosses the Dangerous Grounds, Sabah Trough and the Sabah Basin. The lineament trend was interpreted to be evolving !Tom W-E in southwestern Sarawak to NE-SW in the central region onto Sabah, and finally ending in anE-W trend at the northern tip of Sabah. This dynamic change in orientation, coupled with cross-cutting NW-SE lineaments, support the evidence ofmultiphase tectonic evolution that might result in the series of episodes of subduction and collisions during the geological history ofNW Borneo. For gravity interpretation, the principles of Airy isostasy were used together with the current tectonic model of NW Borneo to model the crust structure to agree. The resulting interpretation shows that the offshore region of NW Borneo is underlain by attenuated crust where the crust is thinnest beneath the Sabah Through. This thinned crust is buried underneath prograding sediments of the Sabah margin overlying accreationary prism fonned during subduction. The thin subducting crust is the remnant of the extended and attenuated continental rragment of Dangerous Grounds.

Item Type: Thesis (Masters)
Academic Subject : Academic Department - Petroleum Geosciences - Petroleum Engineering - Reservoir Engineering - Reservoir fluid properties
Subject: Q Science > QE Geology
Divisions: Geoscience and Petroleum Engineering
Depositing User: Users 2053 not found.
Date Deposited: 09 Oct 2013 11:07
Last Modified: 25 Jan 2017 09:45
URI: http://utpedia.utp.edu.my/id/eprint/8547

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