Mapping Oolitic Iron Ore Deposits in the Ashumaysi Formation, Western Saudi Arabia, Using Different Remote Sensing Techniques Applied to Landsat 7 Enhanced Thematic Mapper Plus Data (ETM+)

مقال فى مجلة

2018

تم النشر فى: https://doi.org/10.1007/s12524-018-0786-y

Mapping the surficial extent of oolitic iron ore deposits hosted in the Oligo–Miocene sedimentary rocks of the Ashumaysi
Formation, western Saudi Arabia, was carried out using Landsat 7 Enhanced Thematic Mapper Plus (ETM?) data. Ore
samples were collected from four various locations in the study area, and were studied in the laboratory using the GER
3700 Spectroradiometer (0.4–2.5 lm) and X-ray diffraction (XRD). Principal component analysis (PCA), minimum noise
fraction (MNF), and minimum distance classification were used and assessed to map mineralization zones in the study area.
Good correspondences were observed between the results obtained from the above mentioned techniques, spectral
reflectance analyses, and XRD. The confusion matrix results revealed that mapping of iron ores using MNF is better and
more accurate than using PCA. Good matching was also observed between the spectral reflectance curves of the collected
samples and the corresponding pixels from Landsat 7 ETM?. The results demonstrated the usefulness of the image
processing and interpretation of Landsat 7 ETM? data for the detection and delineation iron ore deposits in arid and semiarid
areas.

• مجلة/صحيفة: Journal of the Indian Society of Remote Sensing