Mount Peake-Crawford - U equivalent concentration grid (AWAGS)

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 radiometric uranium grid has a cell size of 0.00019 degrees (approximately 20m) and shows uranium element concentration of the NTGS Mount Peake-Crawford Magnetic, Radiometric and Elevation Survey, NT 2019 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2019 by the NT Government, and consisted of 136990 line-kilometres of data at 200m line spacing and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid.

辐射测量法（又称伽马射线能谱法）通过探测地球表面附近的伽马射线自然变化，表征钾（K）、铀（U）与钍（Th）的天然放射性衰变所产生的辐射响应。所采集的数据将通过标准化流程进行处理，以确保记录的响应仅源自地下岩石的放射性衰变。经处理后得到的数据集可被解译，以揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量核查，以确保GA发布的最终数据符合使用要求。本辐射测量铀元素网格的单元尺寸为0.00019度（约20米），展示的是2019年北领地（NT）NTGS芒特皮克-克劳福德磁法、辐射测量与高程测量项目的铀元素浓度，单位为百万分比（ppm）。本网格所用数据由北领地政府于2019年采集，总测线长度达136990线公里，测线间距为200米，飞行离地高度为60米。为约束网格中的长波长信号，项目引入了独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁法数据，用于管控本次测量网格的基准水平。