Medusa Banks Port Keats uranium 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 uranium grid has a cell size of 0.001 degrees (approximately 109m) and shows uranium element concentration of the Medusa Banks, Port Keats, WA, 1994 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1994 by the WA Government, and consisted of 68378 line-kilometres of data at 500m line spacing and 100m terrain clearance.

放射性测量法（radiometric method），又称伽马能谱法（gamma-ray spectrometric method），通过检测地球地表附近的伽马射线自然变化量，来反映钾（K）、铀（U）和钍（Th）的天然放射性衰变产生的辐射信号。所采集的数据将采用标准化流程进行处理，确保记录的响应信号仅来自地下岩石的辐射贡献。经处理得到的数据集可通过解译揭示地下地质构造。GA的地球物理学家将对处理后的数据开展质量核验，确保GA发布的最终数据满足使用要求。

本放射性铀元素格网的单元格尺寸为0.001度（约109米），展示了1994年西澳大利亚州（WA）凯茨港美杜莎浅滩区域的铀元素浓度，单位为百万分比（ppm）。本格网所用数据由西澳大利亚州政府于1994年采集，包含68378线公里的探测数据，测线间距为500米，作业离地高度为100米。