UK sand and gravel database

The UK Sand and Gravel Database was compiled during the production of the Industrial Mineral Assessment Reports. The Department of the Environment commissioned this Report series from the British Geological Survey. Data collection extended from the first IMAU report in 1969 to the last report in 1990. The dataset is complete and is derived from reports with some additional boreholes that were never published. Standard procedures were adopted for whole project. Each report studied the sand and gravel resources of an area of between one hundred and two hundred square kilometres. Specially commissioned boreholes on a one kilometre grid basis were used in conjunction with existing geological knowledge to make a resource level assessment of the volume and quality of sand and gravel resource available. A total of 12,563 boreholes were drilled, 53,721 Lithological units described and 54,128 samples collected and graded. This information is presented in the appendixes of the individual reports and as a single database. Data collection is complete. Only factual corrections to the data are occasionally made. The dataset includes the borehole location, total depth, unit thickness, unit lithologies, and grading information.

英国砂砾数据库是在编制工业矿物评估报告期间汇编而成的。环境部委托英国地质调查局完成了这一系列报告的编制。数据收集始于1969年的首次IMAU报告，延续至1990年的最后一期报告。该数据集内容完备，源自报告并辅以未曾公开发表的额外钻孔数据。整个项目遵循了标准化程序。每份报告均对一百至二百平方公里范围内的砂砾资源进行了研究。在结合现有地质知识的基础上，以一公里网格为基准，特别委托了钻孔，以评估砂砾资源的体积和质量。总计钻探了12,563个钻孔，描述了53,721个岩性单元，并收集和分级了54,128个样本。相关信息被呈现于各份报告的附录中，以及作为一个单一数据库。数据收集工作现已完成。数据偶尔会进行事实性修正。该数据集包括钻孔位置、总深度、单元厚度、单元岩性和分级信息。