Mineralogical composition of the analyzed samples as deter-mined through XRD analysis_ Airp stands for rocks around airport (+: dominant; x: present; tr: traces; -: not determined)_
| Sample ID | quartz | kaolinite | calcite | muscovite | hematite | lazurite | gypsum |
|---|---|---|---|---|---|---|---|
| Airp 1 | + | x | x | − | − | − | tr |
| Airp 2 | + | x | tr | tr | − | tr | − |
| Airp 3 | + | x | x | - | - | - | - |
| Airp 5 | + | x | tr | − | − | − | − |
| Airp 7 | + | x | - | - | x | - | - |
| Airp 14 | + | x | x | − | − | − | tr |
| Airp 6 (Ain Khodra 8.1) | + | x | tr | − | − | − | − |
| Gebel Gunna 6 | + | x | - | tr | tr | - | - |
Luminescence measurements data_ (GB: Gebel Gunna, AK: Ain Khodra)_
| Sample No | U(ppm) | Th (Ppm) | K (%) | Rb (Ppm) | Dβ | DY | ED Numbers in brackets in this column indicate number of aliquots measured. The attached errors in all rows were calculated in 1σ probability; for the errors standard errors given in the ED values, these represent the standard errors of the mean value (e.g. 0.33 for 3 aliquots in samples GG6.1). | Age(yrs BC) | Annual Dose,(mGy/yr) Errors 7−12%. |
|---|---|---|---|---|---|---|---|---|---|
| GG6.1 | 0.55 ± 0.077 | 4.97 ± 0.32 | 0.21 ± 0.008 | 10.5 | 0.85 ± 0.1 Half from lower plus half upper 2 mm layer of sand of 0.58 mGy/yr. Includes internal quartz dose. | 0.43 ± 0.04 For GG6.1 final Dy see text, includes cosmic rays dose rate. | 4.83 ± 0.33 (3) | 1800 ± 320 | 1.28 |
| GG6.2 | >> | >> | >> | >> | >> | >> | 5.60 ± 0.45 (5) | 2370 ± 300 | >> |
| GG6.3 | >> | >> | >> | >> | >> | >> | 5.75 ± 0.75 (3) | 2490 ± 450 | >> |
| Average | 2220 ± 300 | ||||||||
| Sand (floor) | 4.0 ± 0.09 | 13.8 ± 1.0 | 2.50 ± 0.1 | 123 | |||||
| AK8.1.1 For AK8.1.1 sample derives from external wall. 6. | 0.89 ± 0.07 | 2.98 ± 0.23 | 0.1175 ± 0.005 | 6 | 0.20 ± 0.007 Thickness of sandy powder 3 mm of 0.08 mGy/yr, betas include internal quartz dose. | 0.85 ± 0.04 | 4.89 ± 0.23 (2) | 2660 ± 230 | 1.05 |
| AK8.1.2 | >> | >> | >> | >> | >> | >> | 4.69 ± 0.35(2) | 2470 ± 300 | >> |
| Average | 2560 ± 250 | ||||||||
| AK8.2.1 | 3.68 ± 0.35(3) | 1500 ± 350 | >> | ||||||
| AK8.2.2 | 3.48 ± 0.23(3) | 1310 ±230 | >> | ||||||
| Average | 1400± 280 AK8.2 derives from adjacent slab of AK8.1; Upper slab’s surface is AK8.2.1 and 8.2.2; Lower slab’s surface is AK8.2.3 and AK8.2.4, not averaged due to large difference. | ||||||||
| AK8.2.3 | 4.34 ± 0.40 (5) | 2130 ± 370 | >> | ||||||
| AK8.2.4 | 3.13 ± 0.25 (7) | 980 ± 240 | >> | ||||||