Elemental distribution of coastal sea and stream sediments in the island-arc region of Japan and mass transfer processes from terrestrial to marine environments

Ohta, Atsuyuki; Imai, Noboru; Terashima, Shigeru; Tachibana, Yoshiko; Ikehara, Ken; Okai, Takashi; Ujiie-Mikoshiba, Masumi; Kubota, Ran

doi:10.1016/j.apgeochem.2007.08.001

Cited by 29 publications

(28 citation statements)

References 14 publications

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“…This simply improves geovisualization of the geochemical maps. If the same classification is applied to the geochemical maps of both terrestrial and marine environments, the regional geochemical differences (as depicted by color variation) of most of the elements in the land or the sea will be obscured [7,8]. For example, for CaO and Sr, which show higher concentrations in the marine sediments (Table 2), their geochemical differences in the terrestrial areas would be obscured in resulting maps using the same classification, as shown in the Legend.…”

Section: Geochemical and Spatial Analysesmentioning

confidence: 99%

“…Percentile ranges are used for the selection of elemental concentration intervals in the geochemical maps: 0 ≤ x ≤ 5, 5 < x ≤ 10, 10 < x ≤ 25, 25 < x ≤ 50, 50 < x ≤ 75, 75 < x ≤ 90, 90 < x ≤ 95, and 95 < x ≤ 100%, where x represents the elemental concentration [30]. This class selection is advantageous in that the same range of percentiles (e.g., 90%-95%) implies the same statistical weight, even at different numerical scales [7,8,30]. Subsequent statistical analysis of geochemical data is performed using EXCEL TOUKEI 7.0 (ESUMI Co. Ltd., Tokyo, Japan).…”

Section: Geochemical and Spatial Analysesmentioning

confidence: 99%

“…This variation is caused simply by the dilution effects of quartz and biogenic calcareous materials, which are abundant in coarse grains but less abundant in fine grains. Thus, we apply a two-way analysis of variance (ANOVA) to determine the factor that most significantly controls the chemical compositions of marine sediments: regional differences or the particle size effect [8]. The procedure is detailed by [8] (Appendix C).…”

Section: Analysis Of Variance (Anova) To Reveal the Effects Of Particmentioning

confidence: 99%

“…The spatial distributions of elemental concentrations in both the terrestrial and marine environments were plotted using geographic information system software (ArcGIS 10.3; Environmental Systems Research Institute (ESRI) Japan Corporation, Tokyo, Japan) after Ohta et al [29]. Different classes of elemental concentrations are applied to the terrestrial and marine environments, because the chemical and mineralogical compositions of sediments differ according to particle size see the details in [7,8]. This simply improves geovisualization of the geochemical maps.…”

Section: Geochemical and Spatial Analysesmentioning

confidence: 99%

“…Ohta and Imai [7] demonstrate an additional use of land and marine geochemical maps, examining particle transfer processes from the land to the sea, or within the marine environment. However, determining provenances with geochemical maps is typically challenging, due to the mixing and homogenization of marine sediments, especially fine sediments such as silt, during transport (e.g., [8]). …”

Section: Introductionmentioning

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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Section: Geochemical and Spatial Analysesmentioning

confidence: 99%

Section: Geochemical and Spatial Analysesmentioning

confidence: 99%

Section: Analysis Of Variance (Anova) To Reveal the Effects Of Particmentioning

confidence: 99%

Section: Geochemical and Spatial Analysesmentioning

confidence: 99%

Section: Introductionmentioning

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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Geochemical investigation of selected elements in coastal and riverine sediments from Ube, Kasado, and Suo-Oshima Bays in the western Seto Inland Sea, Southwest Japan

Rahman

Ishiga

2012

J Oceanogr

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Geochemical reconnaissance survey and environmental assessment for stream sediments of Wadi Um Gier, Southeastern Desert, Egypt

Darwish

2010

Environ Earth Sci

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The purposes of this study were to assess the influence of old mining activities on the geochemistry and quality of sediments and to identify the sites of economic elements. Thirty sites of stream sediment were sampled in the study area covered by granitic, metarhyodacitic and meta-andesitic rocks and related tuffs-hosted abandoned Au mine. The suite of chemical elements, Ag, Bi, Cd, Cu, Fe, Ga, Hg, Mn, Nb, Pb, Rb, Sb, Se, Sn, Te, Th, U, Y, Zn and Zr, pH value and total organic carbon were determined, and univariate, bivariate and multivariate statistical methods were applied. The results show that the enrichment factor (EF) is very high in the case of Te and significant also with respect to Ag, Bi, Cu, Sb, Se, Sn and Zn. Likewise, geoaccumulation indices (Igeos) varied from very highly polluted with Sn and Te, strongly to very strongly polluted with Bi and Se, and moderately polluted with Sb. The polluted sites of Ag, Bi, Sb, Se, Sn and Te were outlined using Igeos maps, and economic sites of Ag and Sn were identified by geochemical maps leading to their sources, which are likely to be mining activities and lithogenic processes. The pollutant elements may cause toxicity in stream sediments, or surface or underground water, as well as plants and animals in the area. This investigation provides an environmental baseline for future monitoring of possible human/anthropogenic, industrial and agricultural impacts on the study area and considers an attempt at re-mining Ag and Sn.

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Elemental distribution of coastal sea and stream sediments in the island-arc region of Japan and mass transfer processes from terrestrial to marine environments

Cited by 29 publications

References 14 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

Geochemical investigation of selected elements in coastal and riverine sediments from Ube, Kasado, and Suo-Oshima Bays in the western Seto Inland Sea, Southwest Japan

Geochemical reconnaissance survey and environmental assessment for stream sediments of Wadi Um Gier, Southeastern Desert, Egypt

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