Mineral Assessment Reports (Bulk minerals)
These reports are on the assessment of bulk mineral resources of areas within the UK. Over 140 reports were produced between 1971 and 1990 as part of a national stock-take of inductrial minerals, funded by the (then) Department of the Environment.
The minerals covered are: sand and gravel, hard rock aggregates, limestone, conglomerate, and celestite (one report).
The reports were produced using data gathered from extensive borehole surveys and contain qualitative and quantitative data on lithology, composition, particle size analysis and other information of commercial value. Boreholes were drilled at a density of one per 1km square.
Resource evaluation, based on statistical assessments, together with summary borehole information and geology, are all shown on an Ordnance Survey National Grid map at a scale of 1:25 000.
In addition to the interpretive information and assessments, the reports contain abridged borehole logs including chemical or particle-size information as appropriate.