Ashton uranium concentration grid

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 uranium grid has a cell size of 0.00083 degrees (approximately 91m) and shows uranium element concentration of the Ashton, WA,1994 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1993 by the WA Government, and consisted of 51484 line-kilometres of data at 400m line spacing and 60m 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）与钍（Th）的自然放射性衰变。所采集的数据将通过标准流程处理，以确保记录的响应仅源自地下岩石的放射性作用。经处理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地球物理学家开展质量核验，以确保GA发布的最终数据符合使用要求。本次的放射性铀元素网格单元尺寸为0.00083度（约合91米），展示了1994年西澳大利亚州（Western Australia，WA）阿什顿地区的铀元素浓度，单位为百万分比（parts per million，ppm）。用于生成该网格的数据由西澳大利亚州政府于1993年采集，总测线长度达51484线千米，测线间距为400米，航空测量离地高度为60米。