GSSA Warrina 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 0.00083 degrees (approximately 87m) and shows potassium element concentration of the Marree-Warrina Airborne Magnetic & Radiometric Survey, SA, 2012 in units of percent (or %). The data used to produce this grid was acquired in 2012 by the SA Government, and consisted of 132484 line-kilometres of data at 400m line spacing and 80m terrain clearance.

辐射测量法（radiometric method，即伽马射线能谱法（gamma-ray spectrometric method））通过探测地表附近的伽马射线自然变化，定量反映由钾（K）、铀（U）及钍（Th）自然放射性衰变产生的辐射信号。所采集的数据将通过标准流程进行处理，以确保记录的响应仅源于地下岩石的放射性辐射。最终生成的数据集可通过解译揭示地下地质构造。经处理的数据将由澳大利亚地质调查局（Geoscience Australia，GA）的地球物理学家开展质量核查，以确保该局发布的最终数据符合使用要求。
本次发布的辐射测量钾元素栅格数据，空间分辨率为0.00083度（约合87米），展示了2012年南澳大利亚州（SA）马雷-沃里纳航空磁测与辐射测量普查项目的钾元素浓度分布，单位为百分比（%）。本栅格数据所用的原始数据由南澳州政府于2012年采集完成，涵盖总长度达132484线公里的测线数据，测线间距为400米，飞行离地高度为80米。