GSSA Marree 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.

放射性测量法（radiometric method，亦称伽马射线能谱法）可探测地球表面附近的伽马射线自然波动，该波动源于钾（K）、铀（U）与钍（Th）的自然放射性衰变。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自地下岩石。经处理后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。本放射性钾元素网格（radiometric potassium grid）的单元尺寸为0.00083度（约合87米），呈现的是2012年南澳大利亚州（SA）马里-沃里纳航空磁测与放射性测量调查项目的钾元素浓度，单位为百分比（%）。用于生成该网格的数据由南澳大利亚州政府于2012年采集，总测线数据长达132484测线公里，测线间距为400米，地形离地高度为80米。