Dumbleyung detailed, WA, 2008 (P1177), 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 Dumbleyung detailed, WA, 2008 (P1177), radiometric line data, AWAGS levelled were acquired in 2008 by the WA Government, and consisted of 75805 line-kilometres of data at a line spacing between 100m 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.

放射测量法（radiometric method，又称伽马能谱测量法gamma-ray spectrometric method）可通过探测地表附近的伽马射线自然变化，反映钾（K）、铀（U）和钍（Th）的天然放射性衰变产生的辐射信号。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自地下岩石的辐射。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，以确保GA发布的最终数据满足应用要求。本数据集为2008年西澳大利亚州（Western Australia, WA）邓利永（Dumbleyung）地区的详细放射测量测线数据（编号P1177），经AWAGS基准平差处理，由西澳大利亚州政府于2008年采集完成，总测线长度达75805线公里，测线间距为100米至400米，飞行离地高度为60米。为抑制数据中的长波长分量，研究人员采用了独立数据集——澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据，对本次调查数据的基准面进行校正。本次测线数据最终基本统一至AWAGS基准体系。