Cobar magnetic and radiometric survey, NSW, 2021 (P5009), Extension 6, radiometric line data

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 Cobar magnetic and radiometric survey, NSW, 2021 (P5009), Extension 6, radiometric line data were acquired in 2021 by the NSW Government, and consisted of line-kilometres of data at 200m line spacing and 60m terrain clearance.

放射性测量法（又称伽马能谱法）通过采集地表附近的伽马射线自然变化数据，以此反映钾（K）、铀（U）及钍（Th）的天然放射性衰变所产生的伽马射线信号。所采集的数据将通过标准化流程进行处理，确保记录的响应信号仅来源于地下岩石的放射性衰变。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发布的最终数据满足既定使用要求。本次2021年新南威尔士州（New South Wales，NSW）科巴（Cobar）磁法与放射性测量项目（编号P5009，扩展6期）的放射性测线数据，由新南威尔士州政府于2021年采集完成，测线间距为200米，作业离地高度为60米，总测线长度以线公里计。