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Principal Component analysis of the geochemistry of soil developed on till in Northern Ireland

Dempster, M, Dunlop, P, Scheib, A.J. and Cooper, M (2013) Principal Component analysis of the geochemistry of soil developed on till in Northern Ireland. Journal of Maps, 2013 . pp. 1-17. [Journal article]

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URL: http://dx.doi.org/10.1080/17445647.2013.789414

DOI: 10.1080/17445647.2013.789414


This paper presents results from the first statistical analysis of soils developed on till in Northern Ireland using the Geological Survey of Northern Ireland Tellus regional geochemical database. Till geochemistry is largely determined by its parent bedrock and soils developed on tills are known to inherit this geochemical signature. Soil geochemistry from areas of till can therefore be used to establish sediment provenance which in turn provides information on palaeo ice flow and ice sheet history. In this study we use Principal Component Analysis to establish geochemical groupings that can be related back to likely bedrock parent material for the tills in the region. The maps, presented here at 1:445,000 scale, show the results of the first regional investigation of soil geochemistry of part of the northern sector of the Irish Ice Sheet. The results indicate that the upper surface of the majority of tills in the study area have a close relationship to local bedrock with rapid geochemical changes observed at lithological boundaries. This suggests that tills in this sector of the Irish Ice Sheet are primarily local in origin, indicating rapid entrainment of bedrock and low rates of evacuation of debris to the ice margin

Item Type:Journal article
Keywords:Geochemistry, Tellus, soil, till, British Irish Ice Sheet
Faculties and Schools:Faculty of Life and Health Sciences > School of Geography and Environmental Sciences
Faculty of Life and Health Sciences
Research Institutes and Groups:Environmental Sciences Research Institute > Quaternary Environmental Change
Environmental Sciences Research Institute
ID Code:25049
Deposited By: Dr Paul Dunlop
Deposited On:23 Apr 2013 14:50
Last Modified:18 May 2013 09:57

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