Bouguer Gravity Anomaly Grid of Onshore Australia 2016

This gravity anomaly grid is derived from observations stored in the Australian National Gravity Database (ANGD) as at February 2016 as well as data from the 2013 New South Wales Riverina gravity survey. Out of the almost 1.8 million records in the ANGD approximately 1.4 million stations together with 19,558 stations from the Riverina survey were used to generate this grid. This product shows spherical cap Bouguer anomalies over onshore continental Australia. The data used in this grid has been acquired by the Commonwealth, State and Territory Governments, the mining and exploration industry, universities and research organisations from the 1940's to the present day. The spherical cap Bouguer anomalies in this grid are the combination of Bullard A and B corrections to the Free Air anomaly values using a density of 2670 kg/m^3.

本次发布的重力异常网格，其数据源自截至2016年2月收录于澳大利亚国家重力数据库（Australian National Gravity Database, ANGD）的观测记录，以及2013年新南威尔士州里弗赖纳重力调查获取的数据集。澳大利亚国家重力数据库内近180万条记录中，约140万个测点，加上里弗赖纳调查的19558个测点，被用于生成该网格。本数据集展示了澳大利亚陆域的球冠布格异常（spherical cap Bouguer anomalies）。本网格所用数据采集自1940年代至今，采集来源包括澳大利亚联邦、各州及领地政府、矿业与勘探行业、高校及科研机构。本网格中的球冠布格异常，是以2670 kg/m³的密度，对自由空气异常（Free Air anomaly）值进行巴拉德A、B校正（Bullard A and B corrections）后的组合结果。