Mt Isa D Gravity Complete Bouguer Anomaly 1VD geodetic

Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. 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 Mt Isa D Gravity Complete Bouguer Anomaly 1VD geodetic is a complete Bouguer anomaly grid for the Mt Isa Area D Gravity Survey (P200643). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. This gravity survey was acquired under the project No. 200643 for the geological survey of QLD. The grid has a cell size of 0.0075 degrees (approximately 794m). A total of 4821 gravity stations were acquired to produce this grid.

重力数据用于表征地球表层下方岩石密度变化引发的微小重力扰动。所采集的原始数据将通过标准化流程开展处理，确保记录得到的响应仅源自地下岩石。经处理生成的数据集可通过解译揭示地下地质构造特征。经处理的数据需经GA地球物理学家开展质量核验，以确保GA发布的最终数据满足使用需求。本次公开的芒特艾萨D重力完整布格异常1VD（一阶垂直导数）大地测量数据集，为芒特艾萨地区D重力测量（项目编号P200643）对应的完整布格异常网格。研究人员对原始网格应用快速傅里叶变换（Fast Fourier Transform, FFT）流程，以计算得到一阶垂直导数网格。本次重力测量系为开展昆士兰州（QLD）地质调查，依据项目编号200643实施。该网格的单元格尺寸为0.0075度（约合794米），共采集4821个重力测点数据以生成该网格。