GSQ Normanton ppmu 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 0.00083 degrees (approximately 90m) and shows uranium element concentration of the Normanton, Qld, 2008 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2008 by the QLD Government, and consisted of 115883 line-kilometres of data at 400m line spacing and 80m terrain clearance.

放射性测量法（radiometric method），亦称伽马能谱法（gamma-ray spectrometric method），通过探测地球表面附近的伽马射线自然波动，以表征钾（K）、铀（U）及钍（Th）的自然放射性衰变所产生的辐射信号。所采集的数据将通过标准化流程进行处理，以确保记录到的响应仅源自地下岩石的辐射。经处理后得到的数据集可通过解译，揭示地下地质构造特征。经处理的数据将由GA地球物理学家开展质量核验，以确保GA发布的最终数据符合使用要求。
本放射性铀元素网格的栅格单元尺寸为0.00083度（约合90米），展示了2008年昆士兰州（Qld）诺曼顿（Normanton）地区的铀元素浓度，单位为百万分比（parts per million，简称ppm）。用于生成该网格的数据由昆士兰州政府于2008年采集，总测线长度达115883线公里，测线间距为400米，地形离地高度为80米。