Evaporate minerals were very important raw materials in very different and broad
industries for years. Since gypsum became important raw material especially in
construction industry as plaster, demand to these minerals rises each following
year. The aim of this thesis is to map out these industrial raw materials by using
remote sensing techniques. Ankara Bala region has very rich Gypsum sites and
this region is showed as one of the best gypsum potential sites of Turkey according
to the studies of MTA so that this area is selected for the usage of remotely sensed
data.
For the remote sensing analyses ASTER images which have high spatial and
spectral resolution are used. The analyses are applied using PCI Geomatica
software and ARCGIS software is used for mapping purposes. Band ratio,
decorrelation stretch, principal component analysis and thermal indices are used in
order to map gypsum minerals. For gypsum minerals previously known Crosta
method is modified and by the selection of suitable bands and principle
components, gypsum minerals are tried to map and it is seen that it has a high
success. For TIR indices previously known Quartz index is modified as Sulfate
index and used for gypsum mapping. For relative accuracy all the results are add,
percentages of the results are estimated. According to results / 288 km2 area is
mapped as gypsum with the total of four methods but it is seen that only 8 km2 is
found by every methods. According to these percentages modified Crosta method
and Sulfate Index methods are showed the highest success.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12609621/index.pdf |
| Date | 01 June 2008 |
| Creators | Oztan, Nihat Serkan |
| Contributors | Suzen, Lutfi M. |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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