Glenormiston, QLD, Sesmic Refraction and Magnetic, 1977 (P447), 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 Glenormiston, QLD, Sesmic Refraction and Magnetic, 1977 (P447), radiometric line data, AWAGS levelled were acquired in 1977 by the QLD Government, and consisted of 5369 line-kilometres of data at 1000m 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，又称伽马能谱法，通过检测地球表面附近的伽马射线自然变化，表征钾（K）、铀（U）及钍（Th）自然放射性衰变产生的辐射信号。所采集的数据将通过标准化流程处理，以确保记录的响应仅源自地下岩石的放射性衰变。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验，以确保GA发布的最终数据符合使用要求。本次编号为P447的昆士兰州（QLD）格洛里莫斯顿1977年地震折射、磁法及放射性测线数据（经澳大利亚全国航空地球物理调查（AWAGS）平差校正），由昆士兰州政府于1977年采集完成，总测线长度达5369测线公里，测线间距为1000米，地形离地高度为100米。为约束数据中的长波长分量，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）航空磁法数据——控制本次调查数据的基准面。本次调查数据最终基本校正至AWAGS基准体系。