Olary Infill, SA, 1989 (P555), radiometric line data

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 (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Olary Infill, SA, 1989 (P555), radiometric line data were acquired in 1989 by the SA Government, and consisted of 4460 line-kilometres of data at 1500m line spacing and 150m terrain clearance.

放射性测量法（radiometric，亦称伽马能谱法）通过探测地球表面附近的伽马射线自然变化，表征钾（K）、铀（U）与钍（Th）的自然放射性衰变所产生的辐射响应。所采集的数据将通过标准流程进行处理，以确保记录的辐射响应仅源自地下岩石。经处理后得到的数据集可通过解译揭示地下地质构造特征。经处理的数据将由GA地球物理学家开展质量核验，以确保GA发布的最终数据符合使用要求。1989年南澳州奥拉里填充区（Olary Infill, SA, 1989，编号P555）的放射性测量测线数据由南澳州政府于1989年采集完成，测线总长度达4460测线公里，测线间距为1500米，航测离地高度为150米。