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Airborne gamma-ray spectrometry can be used as a remote sensing technique to measure the radioelement distribution in the sedimentary sequence that crops out in the Ellsworth Mountains. By means of a highly sensitive detector system it is possible to obtain an almost instantaneous chemical analysis for equivalent uranium, thorium, and potassium that is updated in flight each second. Data provided by this technique, together with visual information recorded during flights, can serve as a reliable basis for stratigraphic correlation and can furnish additional information on diagenetic and sedimentological factors. The radiometric signature of each of the outcropping sedimentary units was determined, and this signature was found to vary within clearly defined limits. The study revealed no significant radiometric anomalies in the Ellsworth Mountains, and this implies that the low-grade metamorphism that is widespread in the area was not sufficient to cause substantial alteration of the original radioelement distribution in the sedimentary rocks.

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