Cobar P5009 EXT 5 Potassium ground concentration grid

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 0.00039074 degrees (approximately 40m) and shows potassium element concentration of the Cobar Magnetic and Radiometric Survey, 2021 in units of percent (or %). The data used to produce this grid was acquired in 2021 by the NSW Government, and consisted of 53617 line-kilometres of data at 200m line spacing and 60m terrain clearance.

放射性测量法（radiometric method），亦称伽马能谱法（gamma-ray spectrometric method），通过探测地球表面附近的伽马射线自然变化，表征由钾（K）、铀（U）和钍（Th）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进行处理，以确保记录的响应仅源于地下岩石的辐射。经处理得到的数据集可通过解译揭示地下地质构造。经处理的数据将由GA的地球物理学家开展质量核验，以确保GA发布的最终数据符合使用要求。本放射性测量钾元素网格的单元尺寸为0.00039074度（约40米），展示了2021年科巴磁法与放射性测量调查（Cobar Magnetic and Radiometric Survey, 2021）的钾元素浓度，单位为百分比（%）。用于生成该网格的数据由新南威尔士州政府（NSW Government）于2021年采集，总测线长度达53617线公里，测线间距为200米，飞行离地高度为60米。