GSQ Isa Georgetown Block B Qld percent 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 0.00048 degrees (approximately 52m) and shows potassium element concentration of the Isa-Georgetown Block B, QLD, 2000, Prospectivity Plus Initiative in units of percent (or %). The data used to produce this grid was acquired in 2000 by the QLD Government, and consisted of 42035 line-kilometres of data at a line spacing between 200m and 400m, and 80m terrain clearance.

放射性测量法（radiometric method，或称伽马射线能谱法（gamma-ray spectrometric method））通过探测地表附近的伽马射线自然变化，以反映钾（K）、铀（U）与钍（Th）的天然放射性衰变产生的辐射信号。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由地下岩石的辐射产生。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。
本次发布的放射性钾元素栅格数据（radiometric potassium grid）像元大小为0.00048度（约52米），展示了2000年昆士兰州（QLD）Isa-Georgetown B区块"勘探潜力提升计划（Prospectivity Plus Initiative）"的钾元素浓度分布，单位为百分比（%）。用于生成该栅格的数据由昆士兰州政府于2000年采集，总测线覆盖长度达42035测线千米，测线间距介于200米至400米之间，飞行地形离地高度为80米。