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The separation of multi-element spatial patterns in till geochemistry of southeastern Sweden combining GIS, principal component analysis and high-dimensional visualization

Katrin Gruenfeld
The separation of multi-element spatial patterns in till geochemistry of southeastern Sweden combining GIS, principal component analysis and high-dimensional visualization
Geochemistry - Exploration, Environment, Analysis (November 2007) 7 (4): 303-318

Abstract

The chemical composition of glacial till is a product of parent rocks, glacial and post-glacial processes and reflects the geogenic variation of chemical elements. Contrasting chemical composition of rock types together with spatial variation in distribution patterns of metals in the fine fraction of till in southeastern Sweden assists in the identification of the signatures reflecting parent rocks in glacial till samples. The spatial patterns of Cu, Co, Ni, Pb, V and Zn in 1411 till samples were presented by point symbol maps, followed by the extraction of multi-element associations by employing principal component analysis (PCA) and interactive high-dimensional visualization. The most influential multi-element spatial patterns in till data could be separated using either the numerical (PCA) or the visual approach. However, more information was extracted by combining the two techniques. In addition, interactive visualization provided an objective presentation of complex information in sparse lithogeochemical data. The study resulted in new knowledge about the natural variation of the levels of six elements in till, and a graphical presentation to convey information about and compare multi-element geochemical signatures.


ISSN: 1467-7873
EISSN: 2041-4943
Serial Title: Geochemistry - Exploration, Environment, Analysis
Serial Volume: 7
Serial Issue: 4
Title: The separation of multi-element spatial patterns in till geochemistry of southeastern Sweden combining GIS, principal component analysis and high-dimensional visualization
Author(s): Gruenfeld, Katrin
Affiliation: Royal Institute of Technology, Engineering Geology, Stockholm, Sweden
Pages: 303-318
Published: 200711
Text Language: English
Publisher: Geological Society Publishing House, London, United Kingdom
References: 23
Accession Number: 2008-002109
Categories: Geochemistry of rocks, soils, and sediments
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables, geol. sketch map
N60°45'00" - N62°15'00", E13°00'00" - E17°00'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 200802
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