GSNSW Exploration NSW Area N Menindee 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 0.00029 degrees (approximately 30m) and shows potassium element concentration of the NSW DMR, Discovery 2000 Area N, Menindee, NSW, 1999 in units of percent (or %). The data used to produce this grid was acquired in 1999 by the NSW Government, and consisted of 41736 line-kilometres of data at 150m line spacing and 40m terrain clearance.

放射性测量法（radiometric method），又称伽马能谱法（gamma-ray spectrometric method），通过检测地球表面附近的伽马射线自然变化量开展工作，这些伽马射线源自钾（K）、铀（U）和钍（Th）的天然放射性衰变。所采集的数据需通过标准流程进行处理，以确保记录的响应仅源于地下岩石。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检查，确保GA发布的最终数据符合使用要求。

本次放射性钾元素网格（radiometric potassium grid）的单元格尺寸为0.00029度（约30米），展示了1999年新南威尔士州（New South Wales，简称NSW）梅宁迪（Menindee）地区Discovery 2000 N区域及NSW DMR范围内的钾元素浓度分布，单位为百分比（%）。用于生成该网格的数据由新南威尔士州政府于1999年采集，共包含41736线公里的测线数据，测线间距为150米，航测地形离地高度为40米。