NTGS SpiritHills 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 NTGS Delamere and Spirit Hills, NT, 2015 in units of percent (or %). The data used to produce this grid was acquired in 2015 by the NT Government, and consisted of 96790 line-kilometres of data at 400m line spacing and 80m terrain clearance.

放射性测量法（radiometric method），亦称伽马射线能谱法（gamma-ray spectrometric method），通过采集地表附近的伽马射线自然变化量，以反映钾（potassium, K）、铀（uranium, U）及钍（thorium, Th）的自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，确保记录到的辐射响应仅来源于地下岩石。经处理得到的数据集可通过解译，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需求。本放射性钾元素网格的单元尺寸为0.00083度（约合91米），展示了2015年北领地（Northern Territory, NT）德尔米尔（Delamere）与精神山（Spirit Hills）区域的钾元素浓度，单位为百分比（%）。用于生成该网格的数据由北领地政府（Northern Territory Government, NT Government）于2015年采集，总测线长度达96790线公里，测线间距为400米，飞行离地高度为80米。