Hodgkinson-Georgetown Block B, QLD, 1999, Prospectivity Plus Init. (P798), 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 Hodgkinson-Georgetown Block B, QLD, 1999, Prospectivity Plus Init. (P798), radiometric line data, AWAGS levelled were acquired in 1999 by the QLD Government, and consisted of 102900 line-kilometres of data at 200m 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（亦称伽马射线能谱法）通过探测地球表面附近的伽马射线，量化其天然变化——这类变化源于钾（K）、铀（U）与钍（Th）的自然放射性衰变。所采集的数据将通过标准流程进行处理，以确保记录到的响应仅由地下岩石产生。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检查，以确保GA发布的最终数据符合使用要求。本数据集为1999年由昆士兰州（QLD）政府采集的霍金森-乔治敦B区块放射性测线数据，隶属于“远景潜力增强计划（Prospectivity Plus Init.，编号P798）”，且已通过全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）完成平差处理。该数据总测线长度达102900测线公里，测线间距为200米，地形离地高度为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（AWAGS）航空磁测数据——对本次调查数据的基准面进行校正。本次调查数据实质上已基于AWAGS完成平差。