MRTAS North East Tasmania 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 0.00042 degrees (approximately 41m) and shows potassium element concentration of the North-East Tasmania, Tas, 2007 in units of percent (or %). The data used to produce this grid was acquired in 2007 by the TAS Government, and consisted of 51969 line-kilometres of data at 200m line spacing and 60m terrain clearance.

放射测量法，即伽马能谱法（gamma-ray spectrometric method），通过探测地球表面附近因钾（K）、铀（U）与钍（Th）的自然放射性衰变所产生的伽马射线，以此测量其天然变化量。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自地下岩石。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地球物理学家进行质量核验，以确保GA发布的最终数据符合使用需求。本放射测量钾网格（radiometric potassium grid）的格网分辨率为0.00042度（约41米），展示了2007年塔斯马尼亚州东北部的钾元素浓度，单位为百分比（%）。用于生成该网格的数据由塔斯马尼亚州政府于2007年采集，测线间距为200米、地形离地高度为60米，总覆盖测线长度达51969测线公里。