GSWA Boorabbin Multiclient 1996 1997 (P1071), 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 GSWA Boorabbin Multiclient 1996 1997 (P1071), radiometric line data, AWAGS levelled were acquired in 1987 by the WA Government, and consisted of 50598 line-kilometres of data at a line spacing between 200m 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.

放射性测量法（或称伽马射线能谱法）通过检测地球表面附近的伽马射线自然变化，对钾（K）、铀（U）及钍（Th）的自然放射性衰变产生的辐射信号进行量化表征。所采集的数据将通过标准化流程进行处理，以确保记录到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，确保GA发布的最终数据符合使用需求。本数据集为西澳大利亚州地质调查局（Geological Survey of Western Australia, GSWA）Boorabbin多客户1996至1997年（P1071）项目的伽马射线能谱剖面数据，经澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）基准校正，由西澳政府于1987年采集完成，总测线长度达50598线公里，测线间距为200米至400米，飞行离地高度为60米。为压制数据中的长波长干扰信号，研究人员采用独立数据集——澳大利亚全国航空地球物理调查（AWAGS）航空磁测数据——来校正本次调查数据的基准面。本次调查数据已基本完成AWAGS基准校正。