Middle Pilbara Marble Bar Goldsworthy ppm thoriumg

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 89m) and shows thorium element concentration of the Middle Pilbara-Marble Bar-Goldsworthy merge, 1996 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1996 by the WA Government, and consisted of 107620 line-kilometres of data at 400m line spacing and 80m terrain clearance.

放射测量法（radiometric method，又称伽马射线能谱法（gamma-ray spectrometric method））可检测地球表面附近的伽马射线自然变化，该变化源自钾（K）、铀（U）与钍（Th）的天然放射性衰变。所采集的数据将通过标准流程进行处理，以确保记录到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。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要求。本次发布的放射测量钍数据网格单元尺寸为0.00083度（约89米），展示了1996年中西皮尔巴拉-大理石巴-古德斯沃斯合并区域（Middle Pilbara-Marble Bar-Goldsworthy merge）的钍元素浓度，单位为百万分之一（parts per million，简称ppm）。用于生成该数据网格的原始数据由西澳大利亚州政府（WA Government）于1996年采集，总测线长度达107620千米，测线间距为400米，地形离地高度为80米。