The Geochemical Baselines Survey of the Environment (G-BASE) project is a systematic survey to establish a geochemical baseline — a point of reference to monitor change — across the United Kingdom. It is the national capability in high-resolution geochemical mapping covering the United Kingdom.
The project aims to have a complete coverage of the United Kingdom by 2020 with geochemical data derived principally from stream sediments at an average density of 1 sample every 1–2 square kilometres of the UK land surface.
Soil samples are also collected in urban areas throughout the UK to complement the regional soil geochemical baseline.
The overall objective of the project is to support UK environmental sustainability and development as defined under Agenda 21 of the United Nations Earth Summit.
Within this context G-BASE data provide a baseline with which to: