Simpson Extensions - Jervois, NT, 2004 (P1061), 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 Simpson Extensions - Jervois, NT, 2004 (P1061), radiometric line data, AWAGS levelled were acquired in 2004 by the NT Government, and consisted of 34000 line-kilometres of data at a line spacing between 200m and 400m, and 60m 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），亦称伽马射线能谱法（gamma-ray spectrometric method），可探测地表附近的伽马射线自然变异，该变异源于钾（K）、铀（U）及钍（Th）的天然放射性衰变。所采集的数据将通过标准流程处理，以确保记录的响应仅源自地下岩石的放射性辐射。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工作，以确保GA发布的最终数据符合使用要求。本数据集为2004年北领地（Northern Territory, NT）政府采集的「辛普森延伸区——北领地杰沃伊斯，2004（P1061）」放射性测量测线数据，经澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）校正平差，总测线长度达34000线公里，测线间距介于200米至400米之间，飞行离地高度为60米。为约束数据中的长波长信号，本次调查采用独立数据集——澳大利亚全国航空地球物理调查（AWAGS）航空磁测数据，对本次测线数据的基准水平进行校正控制。本调查数据已基本校正至AWAGS基准体系。