GSQ Hodgkinson Georgetown Block A Qld 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 0.00096 degrees (approximately 104m) and shows uranium element concentration of the Hodgkinson-Georgetown Block A, QLD, 1999, Prospectivity Plus Init. in units of parts per million (or ppm). The data used to produce this grid was acquired in 1999 by the QLD Government, and consisted of 93258 line-kilometres of data at a line spacing between 200m and 400m, and 80m terrain clearance.

放射性测量法（radiometric method），又称伽马能谱法（gamma-ray spectrometric method），可通过检测地球表层附近的伽马射线自然变化量，反演钾（K）、铀（U）与钍（Th）的天然放射性衰变所产生的辐射信号。所采集的原始数据将通过标准流程开展预处理，以确保记录的响应信号仅源于地下岩石的放射性辐射。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地球物理学家进行质量校验，以确保GA发布的最终数据符合使用要求。
本次发布的放射性铀元素网格数据，其像元尺寸（cell size）为0.00096度（约104米），展示了1999年昆士兰州（QLD）霍金森-乔治敦区块A（Hodgkinson-Georgetown Block A）由Prospectivity Plus Init.提供的铀元素浓度数据，单位为百万分率（parts per million，简称ppm）。本网格数据的原始资料由昆士兰州政府（QLD Government）于1999年采集完成，总测线长度达93258线公里，测线间距介于200米至400米之间，地形离地高度为80米。