CONTRIBUTIONS TO THE GEOLOGY AND MINERALOGY OF WADI RAS ABDA AREA,NORTH EASTERN DESERT, EGYPT | ||
| Nuclear Sciences Scientific Journal | ||
| Article 4, Volume 4, Issue 1, 2015, Pages 47-59 PDF (4.93 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/nssj.2015.30837 | ||
| Authors | ||
| AHMED F. EL HADARY; ASHRAF E. SOLIMAN; ALI A. OMRAN | ||
| Nuclear Materials Authority,Cairo, Egypt | ||
| Abstract | ||
| Wadi Ras Abda has length of about 10 km and width reaching to 50 m, and represents the main part of the drainage pattern of the studied area that bears the same name. The drainage patterns of the studied area are generally dendritic and angular patterns to indicate that, the area has been structurally controlled. The dendritic drainage patterns are predominating at the northern parts where fractures, joints, and faults are affected. The angular pattern type occurs often at the southern parts owing sharp intersections of main stream and its tributaries. Wadi Ras Abda area is dominated by basement rocks encompassing older granitoids, younger gabbros and younger granites as well as several types of post granitic dikes. The studied area is affected by two right-lateral strike-slip faults of NE and NW trends and is influenced by a large graben with 3.2 km wide and extends for 10.4 km in the NW-SE direction. The graben was formed through the interaction of the NWoriented right-lateral-slip faults of conjugated dip directions due NE and SW. Mineralogical investigation of three shear zone samples and seven stream sediments samples revealed the presence of several important heavy minerals. These minerals include magnetite, hematite, ilminite, garnet, zircon, sphene (titanite), columbite, samarskite, chromite and platinum. | ||
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