Structurally controlled radioactivity in the Um Bogma Area, Midwestern Sinai, Egypt

الملخص EN

The Um Bogma area represents an essential part of mid-western Sinai, Egypt.

Sedimentary rocks exposed in the area range in age from Paleozoic to Miocene and overlie non-conformably rocks of Precambrian age.

The delineation of radioactive occurrences in the area and the study of their relation to structures were achieved through the use of aero radiometry, aeromag-netometry, geologic field observations, and chemical analyses of some rock samples.

Various techniques, including reduction to the pole (RTP), filtering, vertical derivative, and statistical trend analysis, were applied to the collected aeromagnetic data to interpret major tectonic trends.

Integration of such techniques has yielded a basement tectonic map for the study area that shows a structurally controlled basin (Wadi Abu Natash basin) in the central part of the area bounded by two major sets of faults trending N25°E and N25°W.

Field observations have proved the existence of several radioactive anomalies within the Wadi Abu Natash structural basin mainly controlled by the intersections of these faults.