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BGS Report, Single Column Layout View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by NERC Open Research Archive Model metadata report for HS2 Area 4 Geology and Regional Geophysics Programme Open Report OR/15/035 BRITISH GEOLOGICAL SURVEY GEOLOGY AND REGIONAL GEOPHYSICS PROGRAMME OPEN REPORT OR/15/035 Model metadata report for HS2 The National Grid and other Ordnance Survey data © Crown Area 4 Copyright and database rights 2014. Ordnance Survey Licence No. 100021290. J Thompson Keywords Report; keywords. National Grid Reference SW corner 450072,241758 NE corner 447441,260924 Map Sheet 94, 114 and 115, 1:50 000 scale, Warwick, Banbury and Towcester Front cover 3D View of modelled volumes. Bibliographical reference THOMPSON, J. 2015. Model metadata report for HS2 Area 4. British Geological Survey Open Report, OR/15/035. 41pp. Copyright in materials derived from the British Geological Survey’s work is owned by the Natural Environment Research Council (NERC) and/or the authority that commissioned the work. You may not copy or adapt this publication without first obtaining permission. Contact the BGS Intellectual Property Rights Section, British Geological Survey, Keyworth, e-mail [email protected]. You may quote extracts of a reasonable length without prior permission, provided a full acknowledgement is given of the source of the extract. 3D images BGS © NERC 2014 using GSI3D methodology and software. Maps and diagrams in this book use topography based on Ordnance Survey mapping. © NERC 2014. All rights reserved Keyworth, Nottingham British Geological Survey 2014 BRITISH GEOLOGICAL SURVEY The full range of our publications is available from BGS shops at British Geological Survey offices Nottingham, Edinburgh, London and Cardiff (Welsh publications only) see contact details below or shop online at www.geologyshop.com BGS Central Enquiries Desk Tel 0115 936 3143 Fax 0115 936 3276 The London Information Office also maintains a reference collection of BGS publications, including maps, for consultation. email [email protected] We publish an annual catalogue of our maps and other publications; this catalogue is available online or from any of the Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG BGS shops. Tel 0115 936 3241 Fax 0115 936 3488 email [email protected] The British Geological Survey carries out the geological survey of Great Britain and Northern Ireland (the latter as an agency service for the government of Northern Ireland), and of the Murchison House, West Mains Road, Edinburgh EH9 3LA surrounding continental shelf, as well as basic research projects. Tel 0131 667 1000 Fax 0131 668 2683 It also undertakes programmes of technical aid in geology in email [email protected] developing countries. The British Geological Survey is a component body of the Natural Environment Research Council. Natural History Museum, Cromwell Road, London SW7 5BD Tel 020 7589 4090 Fax 020 7584 8270 Tel 020 7942 5344/45 email [email protected] Columbus House, Greenmeadow Springs, Tongwynlais, Cardiff CF15 7NE Tel 029 2052 1962 Fax 029 2052 1963 Maclean Building, Crowmarsh Gifford, Wallingford OX10 8BB Tel 01491 838800 Fax 01491 692345 Geological Survey of Northern Ireland, Colby House, Stranmillis Court, Belfast BT9 5BF Tel 028 9038 8462 Fax 028 9038 8461 www.bgs.ac.uk/gsni/ Parent Body Natural Environment Research Council, Polaris House, North Star Avenue, Swindon SN2 1EU Tel 01793 411500 Fax 01793 411501 www.nerc.ac.uk Website www.bgs.ac.uk Shop online at www.geologyshop.com Foreword This is an internal metadata report on the creation of a 3D geological model in the software package GSI3D for a sector (Area 4) of the proposed High Speed 2 railway line. OR/15/035; Draft 0.1 Last modified: 2016/01/21 09:43 Contents Foreword ........................................................................................................................................ 4 Contents .......................................................................................................................................... 2 Summary ........................................................................................................................................ 3 1 Modelled volume, purpose and scale .................................................................................... 3 2 Modelled surfaces/volumes .................................................................................................... 4 3 Modelled faults ....................................................................................................................... 5 4 Model datasets ........................................................................................................................ 6 4.1 GVS and GLEG files ...................................................................................................... 6 4.2 Digital Terrain Model ..................................................................................................... 6 4.3 Borehole data .................................................................................................................. 6 4.4 Geology and other shapefiles ......................................................................................... 6 4.5 Cross-sections ................................................................................................................. 7 5 Model development log .......................................................................................................... 7 6 Model workflow ...................................................................................................................... 7 7 Model assumptions, geological rules used etc ...................................................................... 7 7.1 Outcrop changes ............................................................................................................. 7 7.2 Marlstone Rock Formation ............................................................................................. 8 8 Model limitations .................................................................................................................... 8 9 Model images .......................................................................................................................... 9 Appendix 1 ................................................................................................................................... 11 Appendix 2 – Project GVS.......................................................................................................... 14 Appendix 3 – Project GLEG ...................................................................................................... 23 References .................................................................................................................................... 10 FIGURES Figure 1: Map of model area showing boreholes used and cross sections ...................................... 4 Figure 2: Cross sections constructed for the model ........................................................................ 9 Figure 3: Cross sections including those from areas 3 and 5 that are used in the model calculation. ................................................................................................................................ 9 Figure 4: Exploded view of HS2 Area 4 Model............................................................................ 10 2 OR/15/035; Draft 0.1 Last modified: 2016/01/21 09:43 TABLES Table 1: List of modelled units ....................................................................................................... 4 Summary This report describes the 3D geological model of HS2 (High Speed 2 rail link) Area 4 (Thorpe Mandeville to Ladbroke), created by Jo Thompson with support from Steve Thorpe. 1 Modelled volume, purpose and scale This model is of the bedrock and superficial geology of an area along the proposed route of the High Speed Rail link between London and Birmingham (HS2). It covers the section of the HS2 route between Thorpe Mandeville in Northamptonshire and Ladbroke in Warwickshire. The bedrock geology of this section of the route comprises Triassic to Middle Jurassic strata, together with superficial deposits of glacigenic and fluvial origin. This is one of nine models along the proposed route. It is suitable for use at scales between 1:100,000-1:10,000, down to a depth of 30 m below OD. Prior to the modelling work, an assessment of the quality and availability of the digital geological linework and existing 3D models of the whole HS2 route between London and Birmingham was undertaken (Barron et al., 2012). As a consequence of this review, the geological mapping of this sector was deemed to be adequate, dating from the 1950’s to the 2000’s. Thus this 3D model is based on geological line work from existing 1:10 000 and 1:50 000 scale DiGMapGB data. 3 OR/15/035; Draft 0.1 Last modified: 2016/01/21 09:43 Figure 1: Map of model area showing boreholes used and cross sections. Contains Ordnance Survey data © Crown Copyright and database rights 2014. 2 Modelled surfaces/volumes Table 1: List of modelled units Geological unit Age Model Name Alluvium Quaternary ALV-XCZSV Head Quaternary HEAD-XCZSV Glaciofluvial deposits Mid Mid Pleistocene GFDMP-XSV Pleistocene Till Mid Pleistocene TILMP-DMTN White Limestone Formation Mid Jurassic WHL-LMST 4 OR/15/035; Draft 0.1 Last modified: 2016/01/21 09:43 Rutland Formation Mid Jurassic RLD1-MDST Taynton Limestone Formation Mid Jurassic TY-LMOOL Wellingborough
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