NT P1268 Dunmarra 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 0.00083 degrees (approximately 91m) and shows potassium element concentration of the Dunmarra, NT, 2014 in units of percent (or %). The data used to produce this grid was acquired in 2014 by the NT Government, and consisted of 104017 line-kilometres of data at 400m line spacing and 80m terrain clearance.放射性测量法（radiometric method，又称伽马射线能谱法（gamma-ray spectrometric method））可探测地表附近的伽马射线自然变化，该变化源于钾（K）、铀（U）和钍（Th）的天然放射性衰变。所采集的数据将通过标准流程处理，以确保记录到的响应仅由地下岩石的放射性活动产生。经处理得到的数据集可被解译，用以揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量核查，以确保GA发布的最终数据符合使用要求。本放射性钾元素栅格数据的像元大小为0.00083度（约合91米），展示了2014年北领地（Northern Territory, NT）邓马拉（Dunmarra）地区的钾元素浓度，单位为百分比（%）。本栅格数据所用的原始数据由北领地政府于2014年采集，总测线里程达104017测线公里，测线间距为400米，飞行离地高度为80米。