Macdonald (Jolly Peaks) uranium grid geodetic

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium, uranium and thorium. The data are collected on airborne geophysical surveys conducted by Commonwealth, State & NT Governments and the private sector.

放射性测量法（radiometric method）或伽马能谱法（gamma-ray spectrometric method）通过检测地球表面附近的伽马射线，可量化钾、铀、钍自然放射性衰变所产生的伽马射线自然变化。本数据集采集自联邦、各州及北领地政府与私营机构开展的航空地球物理调查。