GEOLOGY AND STREAM SEDIMENTS STUDIES ON WADI SERIMATI, SOUTH EASTERN DESERT, EGYPT

This study is concerned with the geology and stream sediments of Wadi Serimati area at the
extreme southern part of Eastern Desert of Egypt near the Sudan Frontier. Geologically, the basement
complexes cropping out at Wadi Serimati area include metamorphic rocks, magmatic rocks
and Dokhan volcanics. The metamorphic rocks include basic to intermediate metavolcanics,
while magmatic rocks include tonalite-granodiorite, monzogranite, alkali granite and syenite.
Dokhan volcanic includes sequence of intercalated laminated acidic lava flows, amygdaloidal
andesite, volcanic breccias and pyroclastic rocks. The area is drained by several wadies as Wadi
Serimati, Wadi O Sir-Eirab, Wadi Yoider, Wadi Akau, Wadi Shellal and Wadi Kansisrob, most
of these wadis running NE-SW. Mineralogical studies on the stream sediments of Wadi Serimati
reveal that the heavy minerals content ranging from 8.55% to 25.0.9% with an average content
12.64%. The most important heavy minerals in the stream sediments of Wadi Serimati are zircon.
0.0312%; uranothorite, 0.0018%; titanite, 0.0173%; apatite, 0.0084% and rutile, 0.0023%,
while magnetite content ranging from 1.86% to7.68% constitutes an average of 3.46%. The
radiometric measurements of the studied stream sediments show that eU varies from 1 to 6 ppm
with an average 3.22 ppm, while eTh ranges from 4 to 28 ppm with an average of 11.78 ppm.
The average concentration of Ra and K are 2.26ppm and 2.43% respectively.