GSNSW Exploration NSW Area J Cobar Nymagee Part1 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 Area J,Cobar-Nymagee, NSW, 1998 in units of percent (or %). The data used to produce this grid was acquired in 1998 by the NSW Government, and consisted of 46744 line-kilometres of data at 250m line spacing and 60m terrain clearance.

辐射测量法（radiometric method），亦称伽马能谱法（gamma-ray spectrometric method），通过检测地表附近的伽马射线自然变化，来反映钾（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化流程进行处理，以确保记录的响应信号仅源自地下岩石的辐射。经处理得到的数据集可通过解译揭示地下地质构造。GA的地球物理学家将对处理后的数据开展质量核查，以确保GA发布的最终数据符合使用要求。
本辐射测量钾元素格网的单元格尺寸为0.00049度（约合50米），展示的是1998年新南威尔士州（NSW）科巴-尼马吉（Cobar-Nymagee）地区NSW DMR（New South Wales Department of Mineral Resources）‘探索2000’（Discovery 2000）勘探项目J区的钾元素浓度，单位为百分比（%）。本格网所用数据由新南威尔士州政府于1998年采集，数据总长度达46744线公里，测线间距为250米，地形离地高度为60米。