SA Exploration Initiative - Area C1, SA, 1993 (P702), 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 C1, SA, 1993 (P702), radiometric line data, AWAGS levelled were acquired in 1993 by the SA Government, and consisted of 44091 line-kilometres of data at 400m line spacing 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.

放射性测量法（radiometric method），亦称伽马能谱法（gamma-ray spectrometric method），可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。所采集的数据将通过标准流程进行处理，以确保记录的响应仅源于地下岩石的辐射。经处理得到的数据集可通过解译，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，以确保GA发布的最终数据符合使用需求。本次数据集为1993年由南澳大利亚州政府采集的南澳大利亚勘探计划（SA Exploration Initiative）C1区域（编号P702）伽马能谱测线数据，经澳大利亚全域航空地球物理测量（Australia-wide Airborne Geophysical Survey, AWAGS）平差处理。该数据集总测线长度达44091线公里，测线间距为400米，飞行离地高度为80米。为约束数据中的长波长分量，研究人员采用独立数据集——澳大利亚全域航空地球物理测量（AWAGS）航空磁测数据，对本次测量数据的基准面进行校正控制。本次测量数据实质上已完成AWAGS基准平差。