MRTAS NE Tasmania 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 0.001 degrees (approximately 97m) and shows potassium element concentration of the Mangana-Alberton, NE Tas, 1989 in units of percent (or %). The data used to produce this grid was acquired in 1989 by the TAS Government, and consisted of 2755 line-kilometres of data at 500m line spacing and 243m terrain clearance.放射性测量法（又称伽马能谱测量法）可探测地球表面附近的伽马射线自然变化，此类伽马射线源于钾（K）、铀（U）和钍（Th）的自然放射性衰变。所采集的数据将通过标准流程处理，以确保记录到的响应仅源于地下岩石的放射性衰变。经处理得到的数据集可通过解译揭示地下地质构造。GA地球物理学家将对处理后的数据开展质量校验，以确保GA发布的最终数据符合使用需求。本次放射性钾元素网格数据的格网单元尺寸为0.001度（约合97米），展示了1989年塔斯马尼亚州东北部曼加纳-阿尔伯顿（Mangana-Alberton）区域的钾元素浓度，单位为百分比（%）。用于生成该网格的数据由塔斯马尼亚州政府（TAS Government）于1989年采集，总测线长度达2755测线公里，测线间距为500米，地形离地高度为243米。