Adelaide Geosyncline (Adelaide,Renmark,Barker,Pinnaroo), SA, 1978 (P450), 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 Adelaide Geosyncline (Adelaide,Renmark,Barker,Pinnaroo), SA, 1978 (P450), radiometric line data, AWAGS levelled were acquired in 1978 by the SA Government, and consisted of 25275 line-kilometres of data at a line spacing between 1500m and 3000m, 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.

辐射法，亦称γ射线能谱法（gamma-ray spectrometric method），通过检测地表附近的γ射线自然变化量开展测量，此类射线源自钾（K）、铀（U）及钍（Th）的天然放射性衰变。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来自地下岩石的辐射贡献。经处理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查，以确保GA发布的最终数据符合使用需求。
1978年，南澳大利亚州政府采集了阿德莱德地槽（覆盖阿德莱德、伦马克、巴克、皮纳罗区域）的辐射测线数据，该数据集经澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）平差校正，编号为P450。本次采集的总测线长度达25275线公里，测线间距介于1500米至3000米之间，地形离地高度为150米。为抑制数据中的长波长信号，研究人员采用独立数据集——澳大利亚全国航空地球物理调查（AWAGS）的航空磁测数据——对本次调查数据的基准水平进行校正。本测线数据实质上已完成AWAGS平差处理。