GSWA South Canning 2 Morris Cobb 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 88m) and shows thorium element concentration of the Morris-Cobb, WA, 2010 (South Canning 2) in units of parts per million (or ppm). The data used to produce this grid was acquired in 2010 by the WA Government, and consisted of 134843 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，通过采集地表附近的伽马射线自然变化数据，反演由钾（K）、铀（U）及钍（Th）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源自地下岩石的辐射。经处理得到的数据集可通过解译揭示地下地质构造。GA地球物理学家将对处理后的数据开展质量核查，以确保GA发布的最终数据符合使用要求。

本放射性钍数据栅格的像元尺寸为0.00083度（约88米），展示了2010年西澳大利亚州（WA）莫里斯-科布区域（南坎宁2区，South Canning 2）的钍元素浓度分布，单位为百万分率（ppm）。

本栅格所用数据由西澳州政府（WA Government）于2010年采集获取，总测线长度达134843线公里，测线间距为400米，飞行离地高度为60米。