| Popis: |
A study was carried out on the mineral composition and free Iron oxides of the sediments of the Tigris and Euphrates rivers. Two soils representing the sediments of the Tigris (Al-Numaniyah) and the Euphrates (Al-Shamiya) rivers were selected. The sand was separated by a sieve whose openings were (53 microns) with and without oxides into sand separations (53-2000) µm, to prepare them for mineral examinations, the minerals ofsand samples were Light sand minerals wereseparated from heavy minerals and their ratios were determined using the point-counting device, the morphological properties of the minerals were also determined using polarized light microscopy, and the results showed the following: The results showed the appearance of heavy sand minerals in the sediments of the Tigris river, the appearance of dark minerals (Opaque) represented by Iron oxides in ratio (40.9 and 40.1%), Chlorites (5.4 and 8.3%) and Pyroxene (5.8 and 4.7%). Hornblende (5.4 and 6.4%), Biotite (5.1 and 5.3%), Muscovite (5.7 and 7.5%), Tourmaline (2.6 and 2.2%), Zircon (5.9 and 5.4%), Rutile (3.6%) and Garnets (5.4 and 4.7%) and Epidote (4.5 and 6.7%), As for the sediments of the Euphrates river, opaque minerals were detected represented by Iron oxides (43.7 and 42.8%), Chlorites (6.5 and 8.6%), Pyroxene (6.4 and 4.7%), Hornblende (4.6 and 5.3%), and Biotite (5.7 and 4.9). %), Muscovite (6.4 and 7.4%) and Tourmaline (2.7 and 2.4%) Zircon (6.4 and 4.7%), Rutile (3.3 and 2.6%), Garnets (4.6 and 4.9%), Epidote (5.8 and 6.5%). |
