Buchanan, NT, 2002 - company3 1 (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 - company3 1 (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.

放射性测量法（radiometric method），亦称伽马射线能谱法，通过检测地球表面附近的伽马射线自然变化，量化钾（K）、铀（U）及钍（Th）的自然放射性衰变所产生的信号。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校验，以确保GA发布的最终数据符合使用要求。本次数据集为2002年北领地（Northern Territory, NT）布坎南区域的、经AWAGS校正的放射性测线数据（对应企业3项目1，编号P1023），由北领地政府于2002年采集，总测线长度达175073线公里，测线间距为400米，飞行离地高度为80米。为约束数据中的长波长分量，本次调查采用AWAGS航空磁测数据作为独立数据集，对本次调查数据的基准水平进行校正。本测线数据最终已完成AWAGS基准校正。