SA Exploration Initiative, Area E3, 1994 (P721), radiometric line data, AWAGS levelled

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 SA Exploration Initiative, Area E3, 1994 (P721), radiometric line data, AWAGS levelled were acquired in 1994 by the SA Government, and consisted of 23209 line-kilometres of data at a line spacing between 200m and 400m, and 80m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

放射性（伽马能谱）测量法（radiometric, or gamma-ray spectrometric method）通过探测地球表面附近的伽马射线自然变化，反映钾（K）、铀（U）与钍（Th）的自然放射性衰变所产生的辐射信号。采集所得数据将通过标准化流程处理，确保记录的辐射响应仅源于地下岩石。该方法生成的数据集可用于解译，以揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量核查，确保GA发布的最终数据满足实际使用需求。
本次数据集为1994年南澳勘探计划E3区域（编号P721）的放射性测量航线数据，经澳大利亚全域航空地球物理调查（Australia-wide Airborne Geophysical Survey，简称AWAGS）基准校正，由南澳政府于1994年采集完成，总测线里程达23209公里，测线间距介于200米至400米，飞行离地高度为80米。为约束数据中的长波长分量，本次研究采用独立数据集——澳大利亚全域航空地球物理调查（AWAGS）航空磁测数据，作为本次测量数据的基准水平控制依据。本次测量数据已基本完成AWAGS基准校正。