London Earth Topsoil Chemical Data
The London Earth data is part of a nationwide project to determine the distribution of chemical elements in the surface environment, namely Geochemical Baseline Survey of the Environment (G-BASE). London Earth focuses on the soil of the capital city, the limits of the survey being defined by the Greater London Authority (GLA) administrative boundary. Chemical elements have been determined by X-ray fluorescence spectrometry (XRFS) at the laboratories of the British Geological Survey (BGS) in Keyworth, Nottingham. These results are presented as a MS Excel file.
dataset
protocol: HTTP
name: BGS Homepage
description: The BGS Homepage is an entry point to the BGS data services.
function: information
http://data.bgs.ac.uk/id/dataHolding/13605560
eng
Soil samples were collected at a density of four samples from every square kilometre. Each sample is a composite of five subsamples collected at the corners and centre of a 20 m square. The soil was collected using a 1-m stainless steel hand-held soil auger and stored in Kraft paper bags. The topsoil was collected from a standard depth in the soil profile, 5-20 cm. A surface soil (0-5 cm) and deep soil (35 ? 50 cm) were also collected but these samples are not routinely analysed. The surface and deep soils are archived at the National Geoscience Data Centre (NGDC) in Keyworth along with the excess topsoil samples.
geoscientificInformation
publication
2008-06-01
Soils
Copper
Chemical analysis
Soil sampling
Lead
Geochemical maps
Iron
Cadmium
Zinc
Selenium
Geochemical sampling
Arsenic
Nickel
Top soil
Soil surveys
Soil chemistry
Calcium
Soil analysis
Chromium
revision
2011
NERC_DDC
-0.5170
0.3424
51.6875
51.2896
revision
2009
Greater London Authority [id=41441]
2005
2010
creation
2011
asNeeded
Soil samples were collected as part of the G-BASE project. Samples were analysed by XRFS which gives total element concentrations in the soil samples. Several different XRFS instruments were used (wave dispersive and energy dispersive) to determine 53 chemical elements. Three elements, chlorine (Cl), indium (In) and tellurium (Te) are excluded from the released data set as the majority (>95wt%) of the results for these elements are below the lower limit of detection. Loss on ignition (LOI) (an indicator of the soil�s organic content) and pH has also been determined.
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
Excel Files
Current BGS Version
The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
British Geological Survey
Environmental Science Centre, Nicker Hill, Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
0115 936 3143
0115 936 3276
distributor
British Geological Survey
Environmental Science Centre, Nicker Hill, Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
0115 936 3143
0115 936 3276
pointOfContact
British Geological Survey
Environmental Science Centre, Nicker Hill, Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
0115 936 3143
0115 936 3276
custodian
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3100
pointOfContact
2023-03-22