GSWA Perth Basin North Uranium Grid Geodetic

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 0.00083 degrees (approximately 87m) and shows uranium element concentration of the Perth Basin North, WA, 2011 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2011 by the WA Government, and consisted of 93199 line-kilometres of data at 400m line spacing and 60m terrain clearance.

放射性测量法（radiometric method）又称伽马射线能谱法，其通过探测地球近地表区域的伽马射线自然变异，以反映钾（K）、铀（U）及钍（Th）的天然放射性衰变所产生的辐射信号。所采集的数据将通过标准化流程开展处理，以确保记录的辐射响应仅来源于地下岩石。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地球物理学家进行质量核查，以确保GA发布的最终数据符合使用需求。
本次的放射性铀元素网格数据单元尺寸为0.00083度（约87米），展示了2011年西澳大利亚州（WA）北珀斯盆地的铀元素浓度分布，单位为百万分比（parts per million，ppm）。用于生成该网格的数据由西澳大利亚州政府于2011年采集，数据总测线长度达93199测线公里，测线间距为400米，地形离地高度为60米。