GSWA Balladonia ppm Thorium 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 thorium grid has a cell size of 0.00083 degrees (approximately 85m) and shows thorium element concentration of the Balladonia - Zanthus, WA, 2008 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2008 by the WA Government, and consisted of 43944 line-kilometres of data at 400m line spacing and 60m terrain clearance.

放射性测量法（又称伽马射线能谱法）通过探测地球表面附近的伽马射线自然变化，表征钾（K）、铀（U）及钍（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开展处理，以确保记录到的辐射响应仅源自地下岩石。经处理得到的数据集可通过解译，揭示地下地质构造特征。经处理的数据将由GA地球物理学家进行质量核查，以确保GA发布的最终数据符合使用要求。
本放射性钍元素网格的单元尺寸为0.00083度（约85米），展示了2008年西澳大利亚州巴拉多尼亚（Balladonia）-赞瑟斯（Zanthus）区域的钍元素浓度，单位为百万分比（parts per million，简称ppm）。
用于生成该网格的数据由西澳大利亚州政府（WA Government）于2008年采集，总测线长度达43944线公里，测线间距为400米，飞行离地高度为60米。