Volume 25 Issue S1
May  2019
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Article Navigation >  Journal of Geomechanics  > 2019  >  25(S1): 1-4
YI Liwen, LU Anhuai, GU Xiangping, et al., 2019. EVALUATION OF THE METHODS FOR QUANTITATIVE DETERMINATION OF FE2+/FE3+ RATIOS OF MAGNETITE FROM QIMANTAG METALLOGENIC BELTS. Journal of Geomechanics, 25 (S1): 1-4. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.001
Citation: YI Liwen, LU Anhuai, GU Xiangping, et al., 2019. EVALUATION OF THE METHODS FOR QUANTITATIVE DETERMINATION OF FE2+/FE3+ RATIOS OF MAGNETITE FROM QIMANTAG METALLOGENIC BELTS. Journal of Geomechanics, 25 (S1): 1-4. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.001
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EVALUATION OF THE METHODS FOR QUANTITATIVE DETERMINATION OF FE2+/FE3+ RATIOS OF MAGNETITE FROM QIMANTAG METALLOGENIC BELTS

doi: 10.12090/j.issn.1006-6616.2019.25.S1.001
  • 1.

    College of Resources and Environmental Sciences, Hunan Normal University, Changsha 410081, China

  • 2.

    School of Geosciences and Info-Physics, Central South University, Changsha 410083, China

  • 3.

    Department of Geology, University of Regina, Regina, Saskatchewan S4S 0A2, Canada

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  • Published: 2019-05-01
    Abstract
  • Through the determination of Fe2+/Fe3+ ratios of magnetite from the Qimantag metallogenic belt, the quality of five different methods is evaluated. Oxygen as a super light element, affects the determination results of FeO and Fe2O3 observably when direct oxygen measurement method is used. The valence state method, based on Lα and Lβ spectral intensity ratio of Fe, is also unreliable for FeO and Fe2O3 measurements, because it is hard to establish the relationship between Lβ/ Lα (spectral intensity ratio) and Fe2+/Fe3+(content ratio). Relatively, the charge difference method, the surplus-oxygen method and Mssbauer spectroscopy are still the most favorable methods; however, Mssbauer spectroscopy is limited in spatial resolution to ca. 200 mm, obliterating potential zonations in Fe2+/ Fe3+ ratio.

     

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