GSQ Isa Georgetown Block C Qld total count 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. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered terrestrial dose rate grid.This GSQ Isa Georgetown Block C Qld total count grid geodetic has a cell size of 0.00096 degrees (approximately 103m) and shows the terrestrial dose rate of the Isa-Georgetown Block C,QLD, 2000, Prospectivity Plus Initiative. The data used to produce this grid was acquired in 2000 by the QLD Government, and consisted of 45601 line-kilometres of data at a line spacing between 200m and 400m, and 80m terrain clearance.

放射性测量法（radiometric method，亦称伽马能谱法（gamma-ray spectrometric method））可探测地表附近的伽马射线自然变化，该变化源于钾（K）、铀（U）与钍（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，以确保记录的响应仅源于地下岩石的辐射。处理后得到的数据集可通过解译揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量校验，以确保GA发布的最终数据符合使用要求。地面剂量率网格通过滤波后的钾、铀、钍网格的线性组合生成，随后对该网格应用低通滤波器，得到滤波后的地面剂量率网格。本数据集为GSQ昆士兰州（QLD）Isa-Georgetown C区块总计数大地测量网格，其像元大小为0.00096度（约103米），展示了2000年“远景资源增强计划（Prospectivity Plus Initiative）”覆盖的该区块地面剂量率分布。本网格的数据由昆士兰州政府于2000年采集，总测线长度达45601千米，测线间距介于200米至400米之间，地形离地高度为80米。