Tasmanian Tiers Airborne Magnetic, Radiometric and Digital Elevation Survey, TAS, 2021, (P5003), Block 2, radiometric line data

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 Tasmanian Tiers Airborne Magnetic, Radiometric and Digital Elevation Survey, TAS, 2021, (P5003), Block 2, radiometric line data were acquired in 2021 by the TAS Government, and consisted of 32951 line-kilometres of data at 200m line spacing and 80m terrain clearance.

伽马射线能谱法（radiometric method，又称辐射测量法）通过探测地球表面附近的伽马射线自然变化，对钾（K）、铀（U）和钍（Th）的自然放射性衰变产生的信号进行测量。所采集的数据将通过标准流程处理，以确保记录的响应仅来自地下岩石。所得数据集可通过解译揭示地下地质构造。经GA地球物理学家对处理后的数据开展质量检查，确保GA发布的最终数据符合使用要求。本次辐射测量测线数据隶属于2021年塔斯马尼亚梯地航空磁法、辐射测量与数字高程勘测项目（塔斯马尼亚州，编号P5003，区块2），由塔斯马尼亚州政府于2021年采集，数据总长32951测线千米，测线间距200米，地形离地航高80米。