nonCciKeyword

Geochemistry

73 record(s)

 

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From 1 - 10 / 73
  • Soil samples collected in urban areas throughout the UK are analysed for their major and trace element geochemistry, their pH and organic matter content. Samples are collected at two depths; 0-15cm and 35-45cm at sites selected using a stratified, random design. The data can be used to identify and prioritize contaminated sites. In 1993, the Geochemical Baseline Survey Of The Environm (G-BASE) rural geochemical mapping programme was extended to include sampling in urban areas and to date around 22 urban centres have been sampled. Data is available on key inorganic contaminants including Cr, Cu, Cd, Ni, As, Pb, Zn, Sn and Sb. Results have been standardised to ensure seamless joins between geochemical sampling campaigns. Urban centres are selected in areas where rural sampling is undertaken or where the BGS urban programme is active. Urban centres will continue to be sampled until completion of the rural programme, scheduled for 2015.

  • This layer displays the urban areas for which there is an "urban geochemical mapping" report. An integral part of the G-BASE (Geochemical Baseline Survey of the Environment) mapping programme is to map and establish the soil geochemical baselines of urban areas. These data provide unique soil chemical information for the urban environment and are used to; assess the condition of soils within populated areas, identify and quantify human impact on soils in urban areas through comparison with the rural, natural soil geochemical background and Indicate elevated concentrations of potential harmful elements. 27 urban areas which have been sampled by the project to date.These include Glasgow, Nottingham, Ipswich and Cardiff.

  • Whole-rock geochemistry data of samples collected from Tindfjallajökull volcano, south Iceland. For further information, see Moles, J. D. (2018). Volcanic archives of past glacial environments: Tindfjallajökull volcano, Iceland. PhD thesis, The Open University. http://oro.open.ac.uk/id/eprint/62117. Geographical extent: Bounding box latitude and longitude: SW corner 63°42'N 19°46'W and NE corner 63°50'N 19°28'W.

  • This layer of the map-based index (GeoIndex) shows the boundaries of the G-BASE (Geochemical Baseline Survey of the Environment) project mapping areas, which are reported as geochemical atlases. The majority of atlases are for stream sediment, with data on stream water and soil included where available. Separate stream sediment, soil and stream water atlases have been published for Wales. Hard copy atlases are available for Shetland, Orkney, South Orkney and Caithness, Sutherland, Hebrides, Great Glen, East Grampians, Argyll, Southern Scotland, Lake District, NE England, NW England and N Wales and Wales. Digital atlases/map products are available for the Clyde Basin, Central England, London Region and SW England. National digital atlas products are available also.

  • The full title of this project is" Studies into metal speciation and bioavailability to assist risk assessment and remediation of brownfield sites in urban areas" and is funded by NERC under the URGENT thematic programme form 1998-2001. The project is being undertaken by a consortium of workers from the Imperial College, University of Nottingham, and the British Geological Survey. Innovative collaborative and multi-disciplinary research will be applied to the interpretation of urban geochemical maps and associated meta-datasets to assist decision making by local authorities in the redevelopment of brownfield sites. Source apportionment, speciation and bioavailability of potentially toxic heavy metals will be studied at representative conurbations in the UK Midlands region. Scanning electron microscopy, chemical extractions and soil solution and vegetable analysis, will be integrated with high precision isotopic analyses of Pb and other potential toxic metals in this study. The results will be available as maps in GIS format to provide a generic decision support system for quantitative health risk assessment.

  • Data from projects that investigated the migration, transport and retardation processes of naturally occuring trace elements, as analogues the behaviour in the geosphere environment, of radionuclides from radioactive wastes. Study sites included: the Quaternary Broubster Peat Bog, near Thurso in Caithness (study of the migration behaviour and characteristics of U, Th, Ra, Pb, Cu, Zn, organic complexes such as fulvic and humic acids); the Needle's Eye site (Quaternary estuarine and marsh/mudflat sediments) on the Solway Coast of Dumfries and Galloway (study of the migration and retardation behaviour of U in Quaternary sediments and fractured Palaeozoic source rocks); Study of U geochemistry and transport behaviour from uranium-rich mine wastes at the South Terras Mine site, near St Austell, Cornwall; Study of the geochemistry of diffusion of Cl and I from marine source sediments into lacustrine sediments in Quaternary sediments from Loch Lomond. Data consists entirely of published reports of geological, geochemical, hydrochemical petrological and mineralogical information. The data includes descriptive and numerical data but is not digitally available in its present state.

  • The stratigraphic scope of the data is 1) the Polarisbreen Group of NE Svalbard (late Tonian to Ediacaran) and 2) top Appin and lower Argyll Groups, western Scotland (late Tonian to Cryogenian). Geochemical data on carbonates includes, in different cases, stable oxygen and carbon isotopes, strontium isotopes and trace elements. Results from Scotland are published in: Fairchild, I.J., Spencer, A.M., Ali, D.O., Anderson, R.P., Anderton, R., Boomer, I., Dove, D., Evans, J.D., Hambrey, M.J., Howe, J., Sawaki, Y., Wang, Z., Shields, G., Skelton, A. Tucker, M.E. and Zhou, Y. 2017 Tonian-Cryogenian boundary sections of Argyll, Scotland. Precambrian Research. doi: 10.1016/j.precamres.2017.09.020. An additional plot of some of the data is in: Ali, D.O., Spencer, A.M., Fairchild, I.J., Chew, K.J., Anderton, R., Levell, B.K., Hambrey, M.J., Dove, D., Le Heron, D.P. 2018. Indicators of relative completeness of the glacial record of the Port Askaig Formation, Garvellach Islands, Scotland. Precambrian Research. Doi: 10.1016/j.precamres.2017.12.005. Results from Svalbard are partly published (Elbobreen Formation, members 3 and 4; Wilsonbreen Formation) in the publications listed below. Data on Elbobreen Formation, members 1 and 2 and the Dracoisen Formation are not published at the time of writing (January 2018). Fairchild, I.J., Bonnand, P., Davies, T., Fleming, E.J., Grassineau, N., Halverson, G.P., Hambrey, M.J., McMillan, E.A., McKay, E., Parkinson, I.J. and Stevenson, C.T.E. 2016 The Late Cryogenian Warm Interval, NE Svalbard: chemostratigraphy and genesis of dolomitic shales. Precambrian Research, 281, 128-154. Fairchild, I.J., Fleming, E.J., Bao, H., Benn, D.I., Boomer, I., Dublyansky, Y.V., Halverson, G.P., Hambrey, M.J., Hendy, C., McMillan, E.A., Spötl, C., Stevenson, C.T.E. and Wynn, P.M. 2016 Continental carbonate facies of a Neoproterozoic panglaciation, NE Svalbard. Sedimentology, 63, 443-497. Benn, D.I., Le Hir, G., Bao, H., Donnadieu, Y., Dumas, C., Fleming, E.J., Hambrey, M.J., McMillan, E.A., Petronis, M.S., Ramstein, G., Stevenson, C.T.E., Wynn, P.M. and Fairchild, I.J. 2015 Orbitally forced ice sheet fluctuations at the end of the Marinoan Snowball Earth glaciation Nature Geoscience. 8, 704-707. Fleming, E.J. (2014) Magnetic, Structural and Sedimentological Analysis of Glacial Sediments: Insights from Modern, Quaternary and Neoproterozoic Environments. Unpublished PhD Thesis. University of Birmingham. Available at: http://etheses.bham.ac.uk/5136/

  • THIS DATASET HAS BEEN WITHDRAWN **This dataset was created for the "Britain beneath our feet" atlas using information extracted from the Geochemical Baseline Survey Of The Environment (G-BASE) For The UK . For Uranium in stream sediment data please see Geochemical Baseline Survey Of The Environment (G-BASE) For The UK ** Geochemical Baseline Survey Of The Environment (G-BASE) coverage for Uranium in stream sediment. The G-BASE programme involves systematic sampling and the determination of chemical elements in samples of stream sediment, stream water and, locally, soil, to build up a picture of the surface chemistry of the UK. The average sample density for stream sediments and water is about one site per 1.5-2km square. Analytical precision is high with strict quality control to ensure countrywide consistency. Results have been standardised to ensure seamless joins between geochemical sampling campaigns. The data provide baseline information on the natural abundances of elements, against which anomalous values due to such factors as mineralisation and industrial contamination may be compared.

  • THIS DATASET HAS BEEN WITHDRAWN **This dataset was created for the "Britain beneath our feet" atlas using information extracted from the Geochemical Baseline Survey Of The Environment (G-BASE) For The UK . For Copper in Stream Sediment data please see Geochemical Baseline Survey Of The Environment (G-BASE) For The UK ** Geochemical Baseline Survey Of The Environment (G-BASE) coverage for copper in stream sediment. The G-BASE programme involves systematic sampling and the determination of chemical elements in samples of stream sediment, stream water and, locally, soil, to build up a picture of the surface chemistry of the UK. The average sample density for stream sediments and water is about one site per 1.5-2km square. Analytical precision is high with strict quality control to ensure countrywide consistency. Results have been standardised to ensure seamless joins between geochemical sampling campaigns. The data provide baseline information on the natural abundances of elements, against which anomalous values due to such factors as mineralisation and industrial contamination may be compared. Published in Britain beneath our feet atlas.

  • A collection of regional geochemical data, mainly from stream sediment surveys, gathered from many BGS overseas projects since 1960s. Some areas are well covered and well documented with data available digitally on CD-ROM. Projects from 1960s and 1970s generally have no digital data and information exists only in paper form.