TEISA - Area M3, SA, 2000 (Mann) (P830), 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 TEISA - Area M3, SA, 2000 (Mann) (P830), radiometric line data, AWAGS levelled were acquired in 2000 by the SA Government, and consisted of 51052 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））可探测地表附近的伽马射线自然变化，该变化源自钾（K）、铀（U）与钍（Th）的自然放射性衰变。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放射性信号。经处理后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验，以确保GA发布的最终数据符合使用需求。本次数据集为TEISA项目M3区域（南澳大利亚州，SA）的航空放射性测线数据（编号P830，由曼恩（Mann）采集），该数据已于2000年由南澳大利亚州政府获取，且已参照全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey，AWAGS）完成平差处理，总测线长度达51052测线公里，测线间距为400米，飞行离地高度为80米。为抑制数据中的长波长噪声，研究人员采用独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey，AWAGS）航空磁测数据——对本次调查数据的基准水平进行校正。本次调查数据本质上已参照AWAGS完成平差处理。