Helicopter Gravity (P197100), gravity point data

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 Helicopter Gravity (P197100) contains a total of 4457 point data values acquired at a spacing of 11000 metres. The data is located in WA and were acquired in 1971, under project No. 197100 for Bureau of Mineral Resources (BMR).

重力数据用于捕捉地球表层下方岩石密度变化所引发的微小重力场扰动。所采集的数据将通过标准流程进行处理，以确保记录的响应仅由地下岩石的密度变化产生。经处理得到的数据集可通过解译，用以揭示地下地质构造。GA地球物理学家会对处理后的数据开展质量核查，以确保GA发布的最终数据满足使用需求。本直升机重力测量数据集（P197100）共包含4457个测点数据，测点间距为11000米。该数据集采集于西澳大利亚州（Western Australia，简称WA），采集时间为1971年，隶属于矿产资源局（Bureau of Mineral Resources，简称BMR）编号为197100的项目。