Buchanan, NT, 2002 - company2 (P1023), 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 Buchanan, NT, 2002 - company2 (P1023), radiometric line data, AWAGS levelled were acquired in 2002 by the NT Government, and consisted of 175073 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.

放射性能谱（radiometric，又称伽马射线能谱）测量法，通过采集地表附近的伽马射线自然变化数据，以反映由钾（K）、铀（U）及钍（Th）的天然放射性衰变产生的辐射响应。所采集的数据将通过标准化流程进行处理，确保记录到的辐射响应仅来自地下岩石。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。本次数据集由北领地（NT）政府于2002年采集，为北领地巴克汉顿（Buchanan）2002年company2（P1023）放射性能谱测线数据，且已完成澳大利亚全域航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）水准校正，总测线长度达175073线公里，测线间距为400米，作业离地高度为80米。为约束数据中的长波长分量，本研究采用独立数据集——澳大利亚全域航空地球物理调查（AWAGS）航空磁测数据，对本次测量数据的基准面进行校正控制。本次测量数据实质上已基于AWAGS完成水准校正。