GSWA Carnarvon Basin South 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 88m) and shows potassium element concentration of the Carnarvon Basin South, WA, 2011 in units of percent (or %). The data used to produce this grid was acquired in 2012 by the WA Government, and consisted of 124028 line-kilometres of data at 400m line spacing and 60m terrain clearance.

放射性测量法（又称伽马能谱法，radiometric or gamma-ray spectrometric method）通过检测地球表面附近的伽马射线自然变化，反映钾（K）、铀（U）与钍（Th）的天然放射性衰变产生的辐射信号。采集所得的数据将通过标准流程进行处理，以确保记录的信号仅由地下岩石产生。处理结果可生成数据集，通过解译该数据集能够揭示地下地质构造。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。本次的放射性钾元素网格数据单元尺寸为0.00083度（约合88米），展示了2011年西澳大利亚州南卡那封盆地（Carnarvon Basin South, WA）的钾元素浓度分布，单位为百分比（%）。用于生成该网格的数据由西澳大利亚州政府于2012年采集，总数据量达124028线公里，采用400米线间距与60米飞行离地高度采集。