Forum No.40: Remote Sensing for Geological Mineral Exploration.
Dr. Abdelgadir Abuelgasim
1. Hyper-spectral remote sensing is a new spectroscopy for mapping geological resources by collecting measurements in more than 200 spectral bands with a spectral resolution between 5-10 nms (e.g.400-405nms)
2. The multi-spectral remote sensing involves the collection of few bands 5-10 at a wider range 400-500nms.
3. Imaging spectrometers are particular sensors that that capture the reflected radiation in very narrow, contiguous spectral bands throughout the visible, near-infrared, shortwave infrared and thermal infrared portions of the electromagnetic spectrum.
4. The collection of such continuous narrow band information allows the construction of an effective continuous spectral reflectance of terrestrial surfaces.
5. This is particularly useful for geologic and mineral mapping. It allows the detection of fine features exhibited by particular rock types or geologic features.
6. Absorption and reflection features within the spectral reflectance curve are usually lost when using broad band multi-spectral data, so certain surfaces or objects have particular spectral signature which allows the detection of their location within the image.
7. In Sudan, the potentials offered by remote sensing and hyperspectral remote sensing in particular to aid in geologic and mineral mapping are immense. It is about time that more effort, work and resources be put into tapping into this potential to insure economic and social development.