GSNSW Exploration NSW Area H Cargelligo Narrandera potassium 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 potassium grid has a cell size of 0.00049 degrees (approximately 50m) and shows potassium element concentration of the NSW DMR, Discovery 2000, Cargelligo/Narrandera, AREA H, 1995 in units of percent (or %). The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 123700 line-kilometres of data at 250m line spacing and 60m terrain clearance.

放射性测量法（radiometric method，又称伽马射线能谱法（gamma-ray spectrometric method））通过探测地球表面附近的伽马射线自然波动，表征钾（K）、铀（U）与钍（Th）的天然放射性衰变所产生的辐射信号。所采集的数据将通过标准流程进行预处理，以确保记录的响应仅源于地下岩石的辐射。经处理得到的数据集可通过解译，揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量检查，以确保GA发布的最终数据符合使用要求。
本次放射性钾元素网格数据的格网单元尺寸为0.00049度（约合50米），展示了1995年新南威尔士州矿产资源局（NSW DMR）"Discovery 2000"项目中Cargelligo/Narrandera区域H区的钾元素浓度分布，单位为百分比（%）。
用于生成该网格的数据由新南威尔士州政府于1995年采集，总数据覆盖长度达123700线公里，测线间距为250米，飞行离地高度为60米。