GSQ Thomson Orogen 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 0.00083 degrees (approximately 87m) and shows uranium element concentration of the Thomson Orogen, Qld, 2011 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2011 by the QLD Government, and consisted of 298198 line-kilometres of data at 400m line spacing and 80m terrain clearance.

放射性测量法（radiometric method，又称伽马射线能谱法（gamma-ray spectrometric method））可测量地球表面附近的伽马射线自然变化，该变化由钾（K）、铀（U）与钍（Th）的天然放射性衰变所引发。所采集的数据将通过标准化流程进行处理，以确保记录的响应信号仅源于地下岩石的放射性衰变。经处理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查，以确保GA发布的最终数据符合实际应用需求。本放射性铀元素格网的单元尺寸为0.00083度（约87米），展示了2011年昆士兰州汤姆森造山带（Thomson Orogen, Qld）的铀元素浓度分布，单位为百万分率（parts per million，简称ppm）。本格网所用数据由昆士兰州政府于2011年采集，总测线长度达298198线公里，测线间距为400米，地形离地高度为80米。