GSWA Lake Muir Potassium 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 potassium grid has a cell size of 0.00063 degrees (approximately 63m) and shows potassium element concentration of the South West (Mt Barker and Lake Muir), WA, 2011 in units of percent (or %). The data used to produce this grid was acquired in 2012 by the WA Government, and consisted of 126090 line-kilometres of data at a line spacing between 200m and 300m, and 50m terrain clearance.

放射性测量法（radiometric method，又称伽马射线能谱法（gamma-ray spectrometric method））通过探测地球表面附近的伽马射线自然变化，来表征钾（K）、铀（U）与钍（Th）的天然放射性衰变所引发的辐射响应。所采集的数据将通过标准化流程进行处理，以确保记录到的响应仅源于地下岩石的辐射。经处理后得到的数据集可通过解译，揭示地下的地质构造特征。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要求。本放射性钾元素网格数据的格网单元尺寸为0.00063度（约合63米），展示了2011年西澳大利亚州（WA）西南部（巴克山与缪尔湖区域）的钾元素浓度分布，浓度单位为百分比（%）。用于生成该网格的数据由西澳大利亚州（WA）政府于2012年采集，总测线长度达126090线公里，测线间距介于200米至300米之间，采集时的地形离地高度为50米。