Tallaringa North - radiometric line data (AWAGS)

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 Tallaringa North - radiometric line data (AWAGS) were acquired in 2017 by the SA Government, and consisted of 98230 line-kilometres of data at 200m line spacing and 60m 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））可测量地表附近探测到的伽马射线自然变化，该变化由钾（K）、铀（U）与钍（Th）的天然放射性衰变所产生。采集所得的数据将通过标准方法进行处理，以确保所记录的响应仅由地下岩石产生。处理后得到的数据集可通过解译以揭示地下地质构造。GA地球物理学家将对处理后的数据进行质量检查，以确保GA发布的最终数据满足使用要求。本次塔拉林加北部放射性测线数据（AWAGS）由南澳大利亚州政府于2017年采集，数据总长98230测线公里，测线间距200米，飞行离地高度60米。为压制数据中的长波长分量，本次项目采用独立数据集——全澳航空地球物理调查（Airborne Geophysical Survey, AWAGS）航空磁测数据，以校准本次测线数据的基准值。本次测线数据本质上已校准至AWAGS基准。