Canning Basin (Charnley,Lennard R,Noonkanbah,Crossland), WA, 1989 (P539), 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 Canning Basin (Charnley,Lennard R,Noonkanbah,Crossland), WA, 1989 (P539), radiometric line data, AWAGS levelled were acquired in 1989 by the WA Government, and consisted of 51022 line-kilometres of data at 1500m line spacing and 150m 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，又称伽马能谱法（gamma-ray spectrometric method）），通过检测地球表面附近的伽马射线自然波动，以反映钾（K）、铀（U）和钍（Th）的天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化流程处理，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，用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，以确保GA发布的最终数据符合使用要求。本次数据集为西澳大利亚州政府于1989年采集的放射性测线数据（编号P539），覆盖西澳大利亚州坎宁盆地（查恩利、伦纳德R、努恩卡巴、克罗斯兰区域），并经全澳航空地球物理调查（AWAGS）完成平差校正。该数据集总测线长度达51022线公里，测线布设间距为1500米，飞行离地高度为150米。为压制数据中的长波长区域背景信号，本次研究引入独立数据集——全澳航空地球物理调查（AWAGS）航空磁测数据，用于校正本次测线数据的基准电平。本次测线数据实质上已基于AWAGS完成基准平差。