Research Paper

last update 2023.07.25

National Institute of Advanced Industrial Science and Technology (AIST)
Geological Survey of Japan, AIST
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REE partitioning between Fe-Mn oxyhydroxide deposits and seawater

  1. Ohta, A. (2006) Experimental and theoretical studies of REE partitioning between Fe hydroxide and Mn oxide and seawater. Chikyukagaku (Geochemistry), 40(1), 13-30 (in Japanese with English abstract). [doi:10.14934/chikyukagaku.40.13]* (The Geochemical Society of Japan Award for Young Researchers 2005).

  2. Tanaka, K., Ohta, A. and Kawabe, I. (2004) Experimental REE partitioning between calcite and aqueous solution at 25°C and 1 atm: Constraints on the incorporation of seawater REE into seamount-type limestones. Geochem. J., 38(1),19-32. [doi:10.2343/geochemj.38.19]*

  3. Ohta, A. and Kawabe, I. (2001) REE(III) adsorption onto Mn dioxide (δ-MnO2) and Fe oxyhydroxide: Ce(III) oxidation by (δ-MnO2). Geochim. Cosmochim. Acta, 65(5), 695-703. [doi:10.1016/S0016-7037(00)00578-0]

  4. Ohta, A. and Kawabe, I. (2000) Theoretical study of tetrad effects observed in REE distribution coefficients between marine Fe-Mn deposit and deep seawater, and in REE(III)-carbonate complexation constants. Geochem. J., 34(6), 455-473. [doi:10.2343/geochemj.34.455]*
    (Errata: Ohta, A. and Kawabe, I. (2000) Theoretical study of tetrad effects observed in REE distribution coefficients between marine Fe-Mn deposit and deep seawater, and in REE(III)-carbonate complexation constants (vol 34, pg 455, 2000). Geochem. J., 35, 213 [PDF].)

  5. Ohta, A. and Kawabe, I. (2000) Rare earth element partitioning between Fe oxyhydroxide precipitates and aqueous NaCl solutions doped with NaHCO3: Determinations of rare earth element complexation constants with carbonate ions. Geochem. J., 34(6), 439-454.[doi:10.2343/geochemj.34.439]*

  6. Ohta, A., Ishii, S., Sakakibara, M., Mizuno, A. and Kawabe, I. (1999) Systematic correlation of the Ce anomaly with the Co/(Ni+Cu) ratio and Y fractionation from Ho in distinct types of Pacific deep-sea nodules. Geochem. J., 33(6), 399-417. [doi:10.2343/geochemj.33.399]*

  7. Kawabe, I., Ohta, A. and Miura N. (1999) Distribution coefficients of REE between Fe oxyhydroxide precipitates and NaCl solutions affected by REE-carbonate complexation. Geochem. J., 33(3), 181-197.[doi:10.2343/geochemj.33.181]*

  8. Kawabe, I., Ohta, A., Ishii, S., Tokumura, M. and Miyauchi, K. (1999) REE partitioning between Fe-Mn oxyhydroxide precipitates and weakly acid NaCl solutions: Convex tetrad effect and fractionation of Y and Sc from heavy lanthanides. Geochem. J., 33(3), 167-179. [doi:10.2343/geochemj.33.167]*

  9. Kawabe, I., Toriumi, T., Ohta, A. and Miura, N. (1998) Monoisotopic REE abundances in seawater and the origin of seawater tetrad effect. Geochem. J., 32(4), 213-229. [doi:10.2343/geochemj.32.213]*

 

Geochemical mapping

  1. Ohta, A., Imai, N., Tachibana, Y. and Ikehara, K. (2022) Application of spatial distribution patterns of multi-elements in geochemical maps for provenance and transfer process of marine sediments in Kyushu, western Japan. From Continental Shelf to Slope: Mapping the Oceanic Realm. Geological Society, London, Special Publications, 505, 241–270. [doi: 10.1144/SP505-2019-87]

  2. Ohta, A., Imai, N., Okai, T., Manaka, M., Kubota, R., Nakamura, A., and Tachibana, Y. (2021) Watershed analysis for geochemical mapping in Japan based on a hydrologic model – the concentrations of 53 elements and the dominant lithology in a drainage basin –. Geochem. J. 55(2), 59–88. [doi:10.2343/geochemj.2.0618]
    (ERRATA in Geochem. J. 56(5), 177–179 [doi: 10.2343/geochemj.2.0618_errata])

  3. Ohta, A. and Minami, M. (2019) Retentive primary Sr isotopic ratio of source rock to sediment and sedimentary rock through multistage sedimentary cycles: Case study of stream sediments in Awajishima Island. Chikyukagaku (Geochemistry), 53(2), 59–70 (in Japanese with English abstract). [doi:10.14934/chikyukagaku.53.59]

  4. Minami, M., Jomori, Y., Suzuki, K. and Ohta, A. (2017) Grain-size variations in 87Sr/86Sr and elemental concentrations of stream sediments in a granitic area: Fundamental study on 87Sr/86Sr spatial distribution mapping. Geochem. J., 51(6), 469–484. [doi:10.2343/geochemj.2.0478]

  5. Jomori, Y., Minami, M., Sakurai-Goto, A., and Ohta, A. (2017) Comparing the 87Sr/86Sr of the bulk and exchangeable fractions in stream sediments: Implications for 87Sr/86Sr mapping in provenance studies. Applied Geochem. 86, 70–83. [doi:10.1016/j.apgeochem.2017.09.004]

  6. Ohta, A., Imai, N., Tachibana, Y. and Ikehara, K. (2017) Statistical analysis of the spatial distribution of multi-elements in an island arc region: Complicating factors and transfer by water currents. Water, 9(1), 37 [doi:10.3390/w9010037].

  7. Jomori, Y., Ohta, A., and Minami, M. (2016) Influence of Akiyoshi limestone bedrock on elemental concentrations and Sr isotopic ratio in stream sediments. Chikyukagaku (Geochemistry), 50(1), 11-27 (in Japanese with English abstract). [doi:10.14934/chikyukagaku.50.1]

  8. Ohta, A., Imai, N., Terashima, S. and Tachibana, Y. (2015) The spatial distribution of multiple elements in the Kanto region of Japan: Transport of chalcophile elements from land to sea. J. Geochem. Explor., 154, 156-170. [doi:10.1016/j.gexplo.2014.11.016]

  9. Nakai, I., Furuya, S., Bong, W. S. K., Abe, Y., Osaka, K., Matsumoto, T., Itou, M., Ohta, A. and Ninomiya, T. (2014) 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. X-ray Spectroscopy, 43(1), 38-48. [doi:10.1002/xrs.2496]

  10. Ohta, A., Imai, N., Terashima, S., Tachibana, Y. and Ikehara, K. (2013) Regional spatial distribution of multiple elements in the surface sediments of the eastern Tsushima Strait (southwestern Sea of Japan). Applied Geochem., 37, 43-56. [doi:10.1016/j.apgeochem.2013.06.010]

  11. Jomori, Y., Minami, M., Ohta, A., Takeuchi, M. and Imai, N. (2013) Spatial distribution of 87Sr/86Sr ratios of stream sediments in Shikoku Island and the Kii Peninsula, Southwest Japan. Geochem. J., 47(3), 321-335. [doi:10.2343/geochemj.2.0248]*

  12. Ohta, A., Imai, N., Terashima, S., and Tachibana, Y. (2011) Regional geochemical mapping in eastern Japan including the nation's capital, Tokyo. Geochem.-Explor. Environ. Anal., 11, 211-223. [doi:10.1144/1467-7873/10-042]

  13. Ohta, A., Imai, N., Terashima, S., Tachibana, Y., Ikehara, K., Katayama, H. and Noda, A. (2010) Factors controlling regional spatial distribution of 53 elements in coastal sea sediments in northern Japan: Comparison of geochemical data derived from stream and marine sediments. Applied Geochem., 25, 357-376. [doi:10.1016/j.apgeochem.2009.12.003]

  14. Ohta, A., Imai, N., Terashima, S., Tachibana, Y., Ikehara, K., Okai, T., Ujiie-Mikoshiba, M., and Kubota, R. (2007) Elemental distribution of coastal sea and stream sediments in the island-arc region of Japan and mass transfer processes from terrestrial to marine environments. Applied Geochem., 22, 2872-2891. [doi:10.1016/j.apgeochem.2007.08.001] (Errata in Applied Geochem., 23, 950-954. http://dx.doi.org/10.1016/j.apgeochem.2008.01.003)

  15. Ohta, A., Imai, N., Terashima, S. and Tachibana, Y. (2005) Influence of surface geology and mineral deposits on the spatial distributions of elemental concentrations in the stream sediments of Hokkaido, Japan. J. Geochem. Explor. 86, 86-103. [doi:10.1016/j.gexplo.2005.04.002]

  16. Ohta, A., Imai, N., Terashima, S. and Tachibana, Y. (2005) Application of multi-element statistical analysis for regional geochemical mapping in Central Japan. Applied Geochem., 20, 1017-1037. [doi:10.1016/j.apgeochem.2004.12.005]

  17. Ohta, A., Imai, N., Terashima, S. and Tachibana, Y. (2004) Investigation of elemental behaviors in Chugoku region of Japan based on geochemical map utilizing stream sediments. Chikyukagaku (Geochemistry), 38, 203-222 (in Japanese with English abstract). [doi:10.14934/chikyukagaku.38.203]*

  18. Ohta, A., Imai, N., Terashima, S., Tachibana, Y., Ikehara, K. and Nakajima, T. (2004) Geochemical mapping in Hokuriku, Japan: Influence of surface geology, mineral occurrences and mass movement from terrestrial to marine environments. Applied Geochem., 19, 1453-1469. [doi:10.1016/j.apgeochem.2004.01.026]

  19. Ohta, A., Imai, N., Okai, T., Endo, H., Ishii, T., Taguchi, Y., Kamioka, H., Mikoshiba (Ujiie), M. and Terashima, S. (2003) Application of geochemical map around Sendai City to investigation of geochemical background and environmental assessment. Earth Science (Chikyu Kagaku), 57, 61-72. (in Japanese with English abstract). [doi:10.15080/agcjchikyukagaku.57.1-2_61]*

  20. Ohta, A., Imai, N., Okai, T., Endo, H., Kawanabe, S., Ishii, T., Taguchi, Y. and Kamioka, H. (2002) The characteristics of chemical distribution patterns in and around Yamagata city -Geochemical map in the southern area of Yamagata Basin-. Chikyukagaku (Geochemistry), 36, 109-125. (in Japanese with English abstract). [doi:10.14934/chikyukagaku.36.109]*

  21. Yamamoto, K., Tanaka, T., Kawabe, I., Iwamori, H., Hirahara, Y., Asahara, Y., Kim, K. H., Richardson, C., Ito, T., Dragusanu, C., Miura, N., Aoki, H., Ohta, A., Sakakibara, T., Tanimizu, M., Mizutani, Y., Miyanaga, N., Murayama, M., Senda, R., Takayanagi, Y., Inoue, Y., Kawasaki, K., Takagi, M., Kawasaki, K., Nebu, S. and Inayoshi, M. (1998) Geochemical map of the Ryoke granitic area in the northeastern part of Toyota City, Aichi Prefecture. Jour. Geol. Soc. Japan, 104, 688-704 (in Japanese with English abstract). [doi:10.5575/geosoc.104.688]*

  22. Tanaka, T., Kawabe, I., Yamamoto, K., Iwamori, H., Hirahara, Y., Mimura, K., Asahara, Y., Ito, T., Yonezawa, T., Dragusanu, C., Kanda, S., Shimizu, O., Hayashi, M., Miura, N., Aoki, H., Ohta, A., Togami, K., Toriumi, T., Matsumura, Y., Sakakibara, T., Tanimizu, M., Mizutani, Y., Miyanaga, N., Murayama, M., and Ohmori, F. (1995) Distribution of elements in stream sediments in and around Seto City, Aichi Prefecture: An attempt to a geoenvironmental assessment by geochemical mapping. Chikyukagaku (Geochemistry), 29, 113-125 (in Japanese with English abstract). [doi:10.14934/chikyukagaku.29.113]*

 

XAFS spectroscopy

  1. Ohta, A., Tanaka, K., and Tsuno, H. (2018) Preliminary evaluation of local structure and speciation of lanthanides in aqueous solution, iron hydroxide, manganese dioxide, and calcite using the L3-edge X-ray absorption near edge structure spectra. J. Phys. Chem. A. 122(41), 8152–8161. [doi: 10.1021/acs.jpca.8b06168]

  2. Ohta, A., Kagi, H., Tsuno, H., Nomura, M., and Okai, T. (2012) Speciation study of Cr(VI/III) reacting with humic substances and determination of local structure of Cr binding humic substances using XAFS spectroscopy. Geochem. J., 46(5), 409-420. [doi:10.2343/geochemj.2.0222]*

  3. Ohta, A., Kagi, H., Nomura, M., Tsuno, H. and Kawabe, I. (2009) Coordination study of rare earth elements in Fe oxyhydroxide and Mn dioxides. Part II. Correspondence of structural change to irregular variations of partitioning coefficients and tetrad effect variations appearing in interatomic distances. Amer. Mineral., 94, 476-486. [doi:10.2138/am.2009.2987]

  4. Ohta, A., Kagi, H., Nomura, M., Tsuno, H. and Kawabe, I. (2009) Coordination study of rare earth elements on Fe oxyhydroxide and Mn dioxides: Part I. Influence of a multi-electron excitation on EXAFS analyses of La, Pr, Nd, and Sm. Amer. Mineral., 94, 467-475. [doi:10.2138/am.2009.2986]

  5. Ohgi, A., Kagi, H., Arima, H., Ohta, A., Kamada, K., Yoshikawa, A. and Sugiyama, K. (2009) Crystal growth and structural characterizations of Ce-doped Gd9.33(SiO4)6O2 single crystals. Journal of Crystal Growth, 311(3), 526–529. (Proceedings Paper: 4th Asian Conference on Crystal Growth and Crystal Technology). [doi:10.1016/j.jcrysgro.2008.09.148]

  6. Odake, S., Fukura, S., Arakawa, M., Ohta, A.., Harte, B. and Kagi, H. (2008) Divalent chromium in ferropericlase inclusions in lower-mantle diamonds revealed by micro-XANES measurements. J. Mineral. Petrol. Sci., 103(5), 350-353. [doi:10.2465/jmps.080620d]*

  7. Ohta, A., Kagi, H., Tsuno,　H., Nomura, M. and Kawabe, I. (2008) Influence of multi-electron excitation on EXAFS spectroscopy of trivalent rare-earth ions and elucidation of change in hydration number through the series. Amer. Mineral., 93, 1384-1392. [doi:10.2138/am.2008.2628]

  8. Yoshida, T., Kagi, H., Tsuno, H., Ohta, A. and Nomura, M. (2005) Oxidation States of Ytterbium Incorporated in Calcium Carbonate and Calcium Fluoride. Chem. Lett., 34(6), 852-853. [doi:10.1246/cl.2005.852]*

 

Aeolian Dust

  1. Zhang, R., Wang, Z., Shen, Z., Yabuki, S., Kanai, Y. and Ohta, A. (2006) Physicochemical characterization and origin of the 20 March 2002 heavy dust storm in Beijing. Aerosol and Air Quality Research, 6, 268-280. [doi: 10.4209/aaqr.2006.09.0004]

  2. Takahashi, Y., Kanai, Y., Kamioka, H., Ohta, A., Maruyama, H., Song, Z. and Shimizu, H. (2006) Speciation of sulfate in size-fractionated aerosol particles using sulfur K-edge X-ray absorption near-edge structure. Env. Sci. Techno., 40, 5052-5057. [doi:10.1021/es060497y]

  3. Ohta, A., Tsuno, H., Kagi, H., Kanai, Y., Zhang, R., Terashima, S. and Nomura, M. (2006) Chemical compositions and XANES speciations of Fe, Mn and Zn from aerosols collected in China and Japan during dust events. Geochem. J., 40(4), 363-376.[doi:10.2343/geochemj.40.363]*

  4. Kanai, Y., Ohta, A., Kamioka, H., Terashima, S., Imai, N., Kanai, M., Shimizu, H., Takahashi, Y., Kai, K., Hayashi, M., Zhang, R. and Sheng, L. (2005) Characterization of Aeolian Dust in East China and Japan from 2001 to 2003. J. Meteor. Soc. Japan, 83A, 73-106. [doi:10.2151/jmsj.83A.73]*

  5. Zhang, R., Wang, M., Sheng, L., Kanai, Y. and Ohta, A. (2004) Seasonal characterization of dust days, mass concentrations and dry deposition of atmospheric aerosols over Qingdao, China. China Particuology, 2, 196-199. [doi:10.1016/S1672-2515(07)60058-X]

  6. Kanai, Y., Ohta, A., Kamioka, H., Terashima, S., Matsuhisa, Y., Shimizu, H., Takahashi, Y., Kai, K., Xu, B., Hayashi, M. and Zhang, R. (2002) Preliminary study on the grain-size distribution and concentration of aeolian dust collected in Japan. J. Arid Land Studies, 11, 307-314.

 

Research for metal speciation in soils and sediments

  1. Ohta, A., Kubota, R., and Okai, T. (2018) Critical evaluation of zinc speciation in geochemical reference materials by combining sequential extraction and XANES spectroscopy. Geochem. J. 52(5), 385–400. [doi:10.2343/geochemj.2.0527]

  2. Ohta, A. and Kubota, R. Copper speciation in a collection of geochemical reference materials using sequential extraction and evaluation of the validity using XANES spectroscopy. Geostand. Geoanal. Res., 40(1), 117-134. [doi:10.1111/j.1751-908X.2015.00335.x]

  3. Ohta, A. (2015) Speciation study of Cr in a geochemical reference material sediment series using sequential extraction and XANES spectroscopy. Geostand. Geoanal. Res., 39(1), 87-103. [doi:10.1111/j.1751-908X.2014.00292.x]

  4. Kubota, R., Ohta, A. and Okai, T. (2014) Speciation of 38 elements in eight GSJ geochemical sedimentary reference materials determined using a sequential extraction technique. Geochem. J., 48(2), 165-188. [doi:10.2343/geochemj.2.0297]*

  5. Tsuno, H., Ohta, A., Kagi, H., Imai, N., Tao, H. and Nomura M. (2006) Speciation of chromium in artificially contaminated soil reference material GSJ JSO-2 using XANES and chemical extraction methods. Geostand. Geoanal. Res., 30(1), 55-62. [doi:10.1111/j.1751-908X.2006.tb00911.x]

  6. Terashima, S., Ohta, A., Okai, T., Imai, N. and Ujiie (Mikoshiba) M. (2004) Geochemistry of elements and parent materials of non-alluvial soils from Tokai and Okinawa districts, Japan. Earth Science (Chikyu Kagaku), 58, 317-336 (in Japanese with English abstract). [doi:10.15080/agcjchikyukagaku.58.5_317]*

 

Research for geochemical reference materials

  1. Nakamura, A., Okai, T., and Ohta, A. (2020) Optimizing the Pratt-type titrimetric method to determine FeO in geochemical reference materials. Geochem. J. 54(5), 337–350. [doi:10.2343/geochemj.2.0605]*

 

Analytical chemistry

  1. Nakamura, A., Ohta, A., Matsuzaki, H., and Okai, T. (2021) 10Be/9Be ratios of phenakite and beryl measured via direct Cs sputtering: Implications for selecting suitable Be carrier minerals for the measurement of low-level 10Be. Geochem. J. 55(4), 209–222. [doi:10.2343/geochemj.2.0630]

 

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