GSWA Newdegate percent 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 85m) and shows potassium element concentration of the Southern Yilgarn (Newdegate, Ravensthorpe, Bremer Bay), WA, 2004 in units of percent (or %). The data used to produce this grid was acquired in 2004 by the WA Government, and consisted of 99719 line-kilometres of data at 400m line spacing and 60m terrain clearance.

放射性测量法（radiometric method），亦称伽马射线能谱法，通过探测地表附近的伽马射线自然波动，来反映钾（K）、铀（U）与钍（Th）的天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，以确保记录的响应仅来源于地下岩石的辐射。经处理得到的数据集可用于解译，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。
该放射性钾元素网格的像元尺寸为0.00083度（约85米），展示了2004年西澳大利亚州（Western Australia，WA）南伊尔冈地区（纽德盖特、拉文斯索普、布雷默湾）的钾元素浓度分布，单位为百分比（%）。用于生成该网格的数据由西澳大利亚州政府于2004年采集，总测线长度达99719线公里，测线间距为400米，地形离地高度为60米。