P201631 Stavely Gravity Traverses CSCBA267GU 1VD

Gravity data measure 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 P201631 Stavely Gravity Traverses CSCBA267GU 1VD is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the Stavely Gravity Traverses, 2016 (P201631). This gravity survey was acquired under the project No. 201631 for the geological survey of VIC. The grid has a cell size of 0.0005 degrees (approximately 50m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 3564 gravity stations at 200m spacing were acquired to produce this grid.

重力数据用于测量地球表面下方岩石密度变化所引发的微小重力场变化。所采集的数据将通过标准流程开展处理，以确保记录的响应仅源于地下岩石的影响。经处理得到的数据集可通过解译，揭示地下地质构造特征。GA的地球物理学家会对处理后的数据进行质量核查，以确保GA发布的最终数据符合使用需求。本次发布的P201631 Stavely重力测线数据集（CSCBA267GU 1VD），是2016年Stavely重力测线项目（P201631）完整球冠布格异常网格的一阶垂直导数数据。本次重力测量是为维多利亚州（VIC）地质调查实施的201631号项目所采集。该网格的网格单元尺寸为0.0005度（约合50米）。通过快速傅里叶变换（Fast Fourier Transform, FFT）对原始网格进行处理，以计算得到一阶垂直导数网格。为生成该网格，共采集了间距为200米的3564个重力测点数据。