Canning Basin SW ppm thorium 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 thorium grid has a cell size of 0.00167 degrees (approximately 179m) and shows thorium element concentration of the Canning Basin (Onshore), WA, 2007 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2007 by the WA Government, and consisted of 103206 line-kilometres of data at 800m line spacing and 80m terrain clearance.

放射性测量法，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响应。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源自地下岩石。处理后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的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需求。
本放射性钍数据网格的单元尺寸为0.00167度（约合179米），展示了2007年西澳大利亚州（WA）坎宁盆地（陆上）的钍元素浓度分布，单位为百万分率（ppm）。本数据网格的原始数据由西澳大利亚州政府于2007年采集，总测线长度达103206公里，测线间距为800米，采集时的地形离地高度为80米。