Integration Of Remote Sensing And Magnetic Methods For Geological Mapping Of Central Zagros Area
Loading...
Date
2011-08
Authors
Mohajerin, Ashkan
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
In this project, Thematic Mapper (TM), Digital Elevation Model (DEM) images and PALSAR Radar images were used to study the geological features of Gardaneh Rokh and Jahan Bin area in Iran. Magnetic Grand Survey data and Aero Magnetic data from these two areas were also used for the purpose of the study. The scanned geological maps and Aero Magnetic maps which were geometrically corrected were used with TM, PALSAR and DEM images to extract geological information. The geological map was used as reference or ground truth data. Several analyses have been done to the images such as colour composite, principal component analysis, ratio, supervised classification, and lineament. In order to evaluate the classification process, accuracy assessment was done to the classified images. The accuracy statistics were the measuring scales of the classification. Besides, contour and drainage patterns analyses were also done to extract elevation, flow direction and flow accumulation to provide further information. Magnetic modelling which was processed from the magnetic data was employed to compensate the geological interpretation. For the classified images, the accuracy for both areas was about 44-74 percent with several outcrops which can be mapped appropriately. The TM and PALSAR images were used for lineament to determine the joints, faults and rivers. The magnetic models for these two areas have misfit of 16.30 and 104.87 which are the degree of suitability between the modelling and the standard profiles. The drainage patterns which can be correlated with elevation contours gave information about the flow direction of the drainage in the areas. Therefore, these few named analyses were flawlessly facilitated in interpreting lithologic and structural geological features which were the matter of interest in this study.
Description
Keywords
Remote sensing and magnetic methods for , geological mapping of central Zagros area