Southern Yilgarn (Newdegate), WA, 2004 (P1067), 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 Southern Yilgarn (Newdegate), WA, 2004 (P1067), radiometric line data, AWAGS levelled were acquired in 2004 by the WA Government, and consisted of 99719 line-kilometres of data at 400m line spacing 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.

放射性伽马能谱测量法（radiometric/gamma-ray spectrometric method）通过检测地球表面附近的伽马射线自然变化，量化由钾（K）、铀（U）与钍（Th）的天然放射性衰变所产生的辐射响应。所采集的原始数据将通过标准化流程进行处理，以确保记录的辐射响应仅源于地下岩石的放射性衰变。经处理得到的数据集可用于解译，以揭示地下地质构造。处理后的数据将由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实际应用需求。本次数据集为2004年西澳大利亚州（Western Australia, WA）政府采集的南伊尔加纳（纽德盖特）地区放射性测线数据（编号P1067），已通过澳大利亚全国航空地球物理调查（Airborne Geophysical Survey, AWAGS）完成平差处理，总测线长度达99719线公里，测线间距为400米，飞行离地高度为60米。为约束数据中的长波长分量，本数据集采用独立数据集——澳大利亚全国航空地球物理调查（Airborne Geophysical Survey, 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。本次测线数据已基本平差至AWAGS基准体系。