Flinders Ranges ppm 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 0.00042 degrees (approximately 43m) and shows uranium element concentration of the Flinders Ranges, SA, 1998 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1999 by the SA Government, and consisted of 127752 line-kilometres of data at a line spacing between 200m and 400m, and 60m terrain clearance.

放射性测量法（radiometric method），又称伽马能谱法（gamma-ray spectrometric method），可检测地表附近伽马射线的自然变化，该变化源于钾（K）、铀（U）和钍（Th）的天然放射性衰变。所采集的数据将通过标准流程进行处理，以确保记录到的伽马射线响应仅由地下岩石产生。经处理得到的数据集可通过解译，揭示地下地质构造。经处理的数据会由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。
该放射性铀测量格网的单元尺寸为0.00042度（约合43米），展示了1998年南澳州（SA）弗林德斯岭（Flinders Ranges）区域的铀元素浓度，单位为百万分率（parts per million，简称ppm）。本格网所用数据由南澳州政府（SA Government）于1999年采集，总测线里程达127752测线公里，测线间距为200米至400米，作业离地航高为60米。