International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B7. Istanbul 2004 
  
  
  
Figure 3. Photograph showing pegmatitic vein (P) 
injected in the younger granites at Gabal Homret 
  
  
  
Figure 4. Photograph showing felsite dyke (F) cut the 
metavolcano-sedimentary rocks, northwest of Gabal 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Ghannam Nusla 
Ser. Site Code Rock Scint. sen 9586] 27h 22Th 
No. type Readings c/s Bq/Kg ppm Bq/Kg ppm 
1 S5 Red granite 160 70.9 +34 5.8 ppm 71.8+11 17.8 ppm 
2 S9 Red granites 250 123.8 +45 10 ppm 55.148 13.6 ppm 
3 S13 Felsite dyke 175 38.9 +15 3.2 ppm 41.8 +8 10.3 ppm 
4 ULI Trachyte dyke 250 211.129 17.2 ppm 120.8+7.2 30 ppm 
S UL2 Trachyte dyke 200 118447 9.6 ppm 116.212 29 ppm 
6 ULA Pegmatite vein 200 120.+37 9.8 ppm 93 +15 23 ppm 
7 ULS Pegmatite vein 230 144.7 +89 12 ppm 145.2 +16 36 ppm 
8 Mnl Manganese vein 200 110.1 +57 9 ppm «DL «DL 
9 Mn2 Manganese vein 120 11.2 13 0.9 ppm «DL «DL 
*DL: Detection limit of the gamma spectrometer S - Trachytic dykes of Hamrat Ghanam area 
Ul = Fesitic dykes of Umm Laseifa area Mn = Manganese veins of Gabal Abu El Tiyur area 
Table 1. Concentration of 
454 
2380 and ??Th in ppm of the study area 
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al., (1999 
the Mio 
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mangane: 
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