GA310 South West Margin 2D MSS, gravity line 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. These line dataset from the GA310 South West Margin 2D MSS survey were acquired for Geoscience Australia in 2008/2009 as part of the Australian Government's Offshore Energy Security Program. This survey acquired a range of pre-competitive geological and geophysical data that included seismic reflection, gravity, magnetic and swath bathymetry measurements, as well as seafloor dredge samples. A total of 26,000 line-kilometres of magnetic and gravity data were acquired during this survey.

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变动。所采集的数据将采用标准化流程进行处理，以确保记录得到的响应仅由地下岩石引起。经处理得到的数据集可通过地质解译，揭示地下地质构造特征。经处理的数据将由GA（Geoscience Australia，澳大利亚地球科学局）地球物理学家开展质量核查，以确保GA发布的最终数据满足使用要求。本次测线数据集源自GA310西南缘二维MSS测量项目，该项目于2008至2009年间为澳大利亚地球科学局实施，属于澳大利亚政府近海能源安全计划的组成部分。本次调查采集了一系列预竞争性地质与地球物理数据，涵盖地震反射、重力、磁法及条带测深测量，同时还采集了海底拖网采样样品。本次调查共采集了26000测线公里的磁法与重力数据。