QUALITATIVE INTERPRETATION OF THE AIRBORNE RADIOMETRIC DATA OF AL-SALMAN AND SUQ AL-SHYUKH QUADRANGLES USING GIS

Abstract

The total count radiometric data of Al-Salman and Suq Al-Shyukh Quadrangles (the map area) was analyzed and separated to its residual and regional (background) maps. The regional maps showed an increase in radiometric background from northeast towards the southwest, while the residual radiometric anomaly map showed two residual radiometric anomalies distributed in the map area. Anomaly R1, which is located in the western part of the map area, this anomaly coincides mainly coincides withdepression fill sediments, valley fill sediments,Umm-Er Radhuma andDammam Formation. This anomaly is related mostly to the radioactivity ofuranium and potassium element. Anomaly R2, is located in the midst part of the map area.This anomaly coincides mostly with depression fill sediments, valley fill sediment, polygenetic sediments, Zahra and Dammam Formation. This anomaly is related mostly to the radioactivity of potassium element. Anomaly R3,is located in the west part of the map area, which comprises of numerous, narrow, elongated, rounded and isolated anomalies extended in NW-SE and N-S. This anomaly coincides and coincides withflood plain sediments,Dry Marsh and Dibdibba Formation. This anomaly is related mostly to the radioactivity of potassium element. A comparison between total count radiometric map and the geological map of the study area was carried out; it showed a radioactive range of each geologic formation and Quaternary sediments. It was concluded that, in general, the structural setting of the map area, which is characterized by existence of numerous surface and subsurface structures might play an important role in forming the radiometric anomalies of the map area. .