West Pilbara, WA, 1995 (P636), 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 West Pilbara, WA, 1995 (P636), radiometric line data, AWAGS levelled were acquired in 1995 by the WA Government, and consisted of 75096 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（亦称伽马能谱法）通过探测地表附近的伽马射线自然变化，反映钾（K）、铀（U）及钍（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处理流程进行处理，以确保记录的响应仅源于地下岩石。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查，以确保GA发布的最终数据符合使用要求。本数据集为1995年由西澳大利亚州政府采集的西皮尔布拉（西澳，1995年，编号P636）伽马能谱测线数据，经AWAGS校准，总测线长度达75096线千米，测线间距400米，地形离地高度80米。为约束数据中的长波长分量，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——来管控本次调查数据的基准水平。本次调查数据实质上已校准至AWAGS标准。