|Coverage||Various areas in the UK|
|Format||Various tape formats and analogue records|
|Price||£45 – £55 per tape. Subject to number of users, licence fee and data preparation fee.
The use of aeromagnetic data in recent years has taken on a new perspective in hydrocarbon exploration with the arrival of high resolution aeromagnetic surveys (HRAS), which have revealed anomalies of very low amplitude that are related to geological structures within sedimentary basins.
The interpretation of HRAS data, however, has been hampered by the paucity of magnetic property information, particularly for sedimentary rocks of Mesozoic and Tertiary ages. Although the natural remanent magnetisation (NRM) cannot be neglected, the magnetic susceptibility of a rock provides a basis for undestanding the magnitude of the total magnetisation.
Susceptibility data have been collected by BGS over many years, particularly for igneous and metamorphic rocks, using laboratory and field instruments and a downhole sonde. A project concerned with the acquisition of data for sedimentary rocks relevant to hydrocarbon exploration has recently been completed and the report and accompanying digital database are now available.
The results presented include: