GSNSW Exploration NSW Area S Braidwood 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 S, Braidwood, NSW 2001 in units of percent (or %). The data used to produce this grid was acquired in 2001 by the NSW Government, and consisted of 25736 line-kilometres of data at 250m line spacing and 60m terrain clearance.

辐射测量法（亦称伽马射线能谱法，radiometric or gamma-ray spectrometric method）可通过监测地球表面附近的伽马射线自然变化，获取由钾（K）、铀（U）及钍（Th）天然放射性衰变产生的辐射信号。所采集的数据将通过标准流程进行处理，以确保记录的响应信号仅由地下岩石的辐射产生。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使用需求。
本次辐射测量钾元素栅格数据的像元大小为0.00049度（约合50米），展示了新南威尔士州DMR（NSW DMR）区域、Discovery 2000项目、S区域及布瑞德伍德（Braidwood）2001区的钾元素浓度，单位为百分比（%）。本栅格数据所用的原始数据由新南威尔士州政府于2001年采集，数据总长度达25736线公里，测线间距为250米，地形离地高度为60米。