Walsh, Red River, Qld, 1992/93 (P600), 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 Walsh, Red River, Qld, 1992/93 (P600), radiometric line data, AWAGS levelled were acquired in 1992 by the QLD Government, and consisted of 54145 line-kilometres of data at 400m line spacing and 100m 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，或称γ射线能谱法（gamma-ray spectrometric method））通过检测地球表层附近的γ射线自然涨落，以反映钾（K）、铀（U）与钍（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进行处理，以确保记录的响应仅来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。
本次发布的测线数据为1992年由昆士兰州（Queensland, QLD）政府采集的1992/1993年度（编号P600）昆士兰州雷德河沃尔什地区放射性测量测线数据，该数据已完成AWAGS基准校正，总测线长度达54145线公里，测线间距为400米，飞行离地高度为100米。为抑制数据中的长波长成分，研究团队采用独立数据集——全澳航空地球物理测量（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据——对本次测线数据的基准水平进行校正。本测线数据已基本完成AWAGS基准校正。