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Mineralogical Studies and Radioactivity of the Top Meter Depth of the Egyptian Black Sand, El-Dibeh, Port Said Governorate, Northern Coast of Egypt |
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PP: 15-27 |
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doi:10.18576/jrna/070203
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Author(s) |
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A. M. El-Shafey,
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Abstract |
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| The study area lies on the Mediterranean Sea coast, about 8 Km east of El-Manzala Lake between longitudes 32˚ 3 41.39" - 32˚ 7 51.46" E and latitudes 31˚ 21 52.92" - 31˚ 19 49.27" N. Mineralogical Investigation was conducted in El-Dibeh, Port Said Governorate beach area to detect economic minerals. Fifty-one samples collected on a grid pattern of 400m parallel to shoreline and 50 m perpendicular to shoreline was made to evaluate an area of 8 km length and 150 m width. Using a definite mineralogical analysis procedure program, the various heavy mineral contents in the different collected samples were calculated. Using both of wet gravity concentration, low and high intensity magnetic separation and the high-tension electrostatic separation techniques, each of the individual six economic minerals, leucoxene and cassiterite can be obtained in a high–grade concentrate with accepted grade and recovery. The resource tonnage for each concerned economic mineral in the different sectional area is calculated for the drilled top meter depth zone to be: (92.640 ilmenite, 58.720 Magnetite, 3.840 garnet, 17.760 Leucoxene, 12.000 zircon, 4.640 rutile, 0.736 monazite and 20.960 Green silicates) a total reserve of thousand tons. The average concentrations of (eU, ppm) and (eTh, ppm) reach up to 1.41 and 4.66 ppm, respectively. In addition, the potassium concentration (K, %), attains an average of 0.60%. Also, the calculated values of absorbed dose were found to be ranged between 6.47 and 32.22 (nGy/h) with an average value 21.54 (nGy/h). This is lower than the world average value of 60 nGy/h. The average value of the total effective dose from all terrestrial gamma radiations is 0.174(mSv/y). |
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