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Regional geochemical mapping in eastern Japan including the nation's capital, Tokyo

Atsuyuki Ohta, Noboru Imai, Shigeru Terashima and Yoshiko Tachibana
Regional geochemical mapping in eastern Japan including the nation's capital, Tokyo
Geochemistry - Exploration, Environment, Analysis (August 2011) 11 (3): 211-223

Abstract

For use in a nationwide geochemical mapping project, 496 stream sediment samples were collected in eastern Japan, including the nation's capital, Tokyo. The 51 elements were determined using ICP-AES and ICP-MS; their spatial distribution maps were created using geographic information system (GIS) software. Spatial distribution patterns of elemental concentrations in stream sediments are consistent with the distribution of surface geology. Heavy metals and toxic elements are highly elevated in the sediments associated with mineral occurrences, but their distributions are limited to a small area. Surveying for nationwide geochemical mapping avoids collection of samples near contamination sources. Nevertheless, high concentrations of P (P (sub 2) O (sub 5) ), Cr, Ni, Cu, Zn, Sn, Sb, Hg, and Pb were found in populated areas. Results of statistical analyses--analysis of variance and a multiple comparison test--suggest that the enrichments are not coincidental phenomena; rather these sediment samples accurately represented contamination.


ISSN: 1467-7873
EISSN: 2041-4943
Serial Title: Geochemistry - Exploration, Environment, Analysis
Serial Volume: 11
Serial Issue: 3
Title: Regional geochemical mapping in eastern Japan including the nation's capital, Tokyo
Affiliation: Geological Survey of Japan, Tsukuba, Japan
Pages: 211-223
Published: 201108
Text Language: English
Publisher: Geological Society Publishing House, London, United Kingdom
References: 32
Accession Number: 2011-097134
Categories: General geochemistryEnvironmental geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables, geol. sketch map
N35°25'00" - N35°52'00", E138°55'00" - E139°55'00"
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: 201150
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