Application of multi-element statistical analysis for regional geochemical mapping in Central Japan

Ohta, Atsuyuki; Imai, Noboru; Terashima, Shigeru; Tachibana, Yoshiko

doi:10.1016/j.apgeochem.2004.12.005

Cited by 55 publications

(49 citation statements)

References 7 publications

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“…Figure 4 shows the terrestrial and marine geochemical maps for 12 elements. Mikoshiba et al [23] and Ohta et al [31,32] [32].…”

Section: Geochemical and Spatial Analysesmentioning

confidence: 99%

“…Ohta et al [32] found that Cu, Zn, Cd, Sn, Sb, Hg, and Pb are significantly enriched in stream sediments collected from the urban areas of Osaka Plain. Similarly, the silty sediments in Osaka Bay are highly enriched in Cr, Cu, Zn, As, Mo, Cd, Sn, Hg, Pb, and Bi (as shown by Cr, Cu, Zn, and As in Figure 4).…”

Section: Transfer Of Materials Related To Mineral Deposits and Anthromentioning

confidence: 99%

“…Thus, we determine a probable distribution using the W-value of the Shapiro-Wilk statistic; the closer this value is to 1.0, the more closely it follows a normal distribution. As an alternative, Ohta et al [8] and Ohta et al [32] proposed that the data with skewness close to zero, which indicates a symmetrical distribution, is used for ANOVA. Both the Shapiro-Wilk statistics and skewness are summarized in Table C1.…”

Section: Appendix Cmentioning

confidence: 99%

“…Ohta et al [29] and Ohta et al [32] assumed that when a specific rock type outcrops over more than half of the drainage basin area, it is representative of the surface rock types in the watershed and is the dominant control of elemental abundances in stream sediments. In the study area, there are seven rock types exposed in more than half of the river basin areas: sediments and sedimentary rocks (Sed); sedimentary rocks of accretionary complexes (Acc); granitic rocks (Gr); felsic volcanic rocks (Fv); mafic volcanic rocks (Mv); debris and pyroclastic rocks (Phy); and high-pressure type metamorphic rocks (Meta).…”

Section: Appendix Amentioning

confidence: 99%

“…In the study area, there are seven rock types exposed in more than half of the river basin areas: sediments and sedimentary rocks (Sed); sedimentary rocks of accretionary complexes (Acc); granitic rocks (Gr); felsic volcanic rocks (Fv); mafic volcanic rocks (Mv); debris and pyroclastic rocks (Phy); and high-pressure type metamorphic rocks (Meta). We further separated those stream sediments collected in urban areas (Sed_u), from sediments and sedimentary rocks (Sed), using a land use map, because anthropogenic contamination significantly enhances certain elements in the sediments, including Cu, Zn and Cd [32]. Table B1 presents the median elemental concentrations of stream sediments classified by the above rock types.…”

Section: Appendix Amentioning

confidence: 99%

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Statistical Analysis of the Spatial Distribution of Multi-Elements in an Island Arc Region: Complicating Factors and Transfer by Water Currents

Ohta

Imai

Tachibana

et al. 2017

Water

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Abstract:The compositions and transfer processes affecting coastal sea sediments from the Seto Inland Sea and the Pacific Ocean are examined through the construction of comprehensive terrestrial and marine geochemical maps for western Japan. Two-way analysis of variance (ANOVA) suggests that the elemental concentrations of marine sediments vary with particle size, and that this has a greater effect than the regional provenance of the terrestrial material. Cluster analysis is employed to reveal similarities and differences in the geochemistry of coastal sea and stream sediments. This analysis suggests that the geochemical features of fine sands and silts in the marine environment reflect those of stream sediments in the adjacent terrestrial areas. However, gravels and coarse sands do not show this direct relationship, which is likely a result of mineral segregation by strong tidal currents and the denudation of old basement rocks. Finally, the transport processes for the fine-grained sediments are discussed, using the spatial distribution patterns of outliers for those elements enriched in silt and clay. Silty and clayey sediments are found to be transported and dispersed widely by a periodic current in the inner sea, and are selectively deposited at the boundary of different water masses in the outer sea.

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“…Figure 4 shows the terrestrial and marine geochemical maps for 12 elements. Mikoshiba et al [23] and Ohta et al [31,32] [32].…”

Section: Geochemical and Spatial Analysesmentioning

confidence: 99%

Section: Transfer Of Materials Related To Mineral Deposits and Anthromentioning

confidence: 99%

Section: Appendix Cmentioning

confidence: 99%

Section: Appendix Amentioning

confidence: 99%

Section: Appendix Amentioning

confidence: 99%

See 3 more Smart Citations

Statistical Analysis of the Spatial Distribution of Multi-Elements in an Island Arc Region: Complicating Factors and Transfer by Water Currents

Ohta

Imai

Tachibana

et al. 2017

Water

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Quantitative analysis of heavy elements and semi‐quantitative evaluation of heavy mineral compositions of sediments in Japan for construction of a forensic soil database using synchrotron radiation X‐ray analyses

et al. 2013

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We have started to construct a nationwide forensic soil sediment database for Japan, based on the heavy mineral and trace heavy element compositions of stream sediments collected at 3024 points across Japan. The data were measured by high‐resolution synchrotron radiation X‐ray powder diffraction (SR‐XRD) and high‐energy SR X‐ray fluorescence analysis (XRF) using the SR source of SPring‐8, the SR radiation facility in Japan. The automated sampling systems allow the measurement of 130 powder diffraction patterns and 100 XRF spectra per day using sediment samples of just a few milligrams, which enabled us to construct a database of a large number of samples. The concentrations of heavy elements such as rare earth elements, Cs and W up to 500 ppm level in soil sediments can be determined by the calibration curve method by using high‐energy SR‐XRF utilizing monochromatic X‐rays of 116 keV. A heavy element concentration map superimposed on a geographical map of Japan was successfully prepared from these analytical data. The heavy mineral compositions were quantitatively evaluated by using the peak intensity of characteristic XRD peaks of the component minerals measured by a Debye–Scherrer camera having a radius of 286.5 mm, recorded with an imaging plate and monochromatic X‐rays (λ = 1.0 Å). This study demonstrates that XRF and XRD data collected from the sediments of Shizuoka Prefecture closely reflect the geological and geographical signature of the sediment samples, which can be used for the provenance determination of soil evidence from a crime scene. Copyright © 2013 John Wiley & Sons, Ltd.

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Effect of mining and geology on the chemistry of stream water and sediment in a small watershed

Kim

Kim³

et al. 2007

Geosci J

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Application of multi-element statistical analysis for regional geochemical mapping in Central Japan

Cited by 55 publications

References 7 publications

Statistical Analysis of the Spatial Distribution of Multi-Elements in an Island Arc Region: Complicating Factors and Transfer by Water Currents

Statistical Analysis of the Spatial Distribution of Multi-Elements in an Island Arc Region: Complicating Factors and Transfer by Water Currents

Quantitative analysis of heavy elements and semi‐quantitative evaluation of heavy mineral compositions of sediments in Japan for construction of a forensic soil database using synchrotron radiation X‐ray analyses

Effect of mining and geology on the chemistry of stream water and sediment in a small watershed

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