Albany-Fraser (Zanthus), WA, 1981 (P461), 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 Albany-Fraser (Zanthus), WA, 1981 (P461), radiometric line data, AWAGS levelled were acquired in 1981 by the WA Government, and consisted of 13624 line-kilometres of data at 1500m line spacing 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.

放射测量法（又称伽马射线能谱法）通过检测地球表面附近的伽马射线自然变化，来反映钾（K）、铀（U）和钍（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流程进行处理，以确保记录的响应仅源于地下岩石。经处理得到的数据集可通过解译，揭示地下地质构造。经处理的数据会由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要求。

1981年，西澳大利亚州（WA）政府采集了编号为P461的奥尔巴尼-弗雷泽（赞瑟斯）地区放射测量测线数据，该数据已完成澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）基准校正。本次采集的数据总测线长度达13624测线公里，测线间距为1500米，地形离地高度为150米。为抑制数据中的长波长信号，研究人员采用澳大利亚全国航空地球物理调查（AWAGS）的航空磁测数据作为独立数据集，对本次测线数据的基准水平进行校正。本次测线数据实质上已完成AWAGS基准校正。