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A Mössbauer study of samples from an oil well

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Abstract

Seven different samples obtained from the Petrobras Oil Well 1-ICA-1BA from depths down to 1872 m have been studied by Mössbauer spectroscopy, X-ray diffraction and neutron activation analysis. The X-ray diffraction showed the presence of clay minerals, feldspar, calcite, pyrite, quartz, dolomite, andrite and others. The neutron activation analysis has been used to obtain the iron concentration in the samples. The Mössbauer spectra were obtained both at room and liquid nitrogen temperatures. Spectra are complex in nature indicating multiple sites or mixture of iron containing minerals. The spectra at 85 K could be least squares fitted are resolved up to four doublets with typical values of IS(Fe)=1.4, 1.21, 1.16, 0.40 and QS=3.62, 2.82, 2.37, 0.61 mm/s respectively. They have slightly large line widths except for the first doublet. Two samples also showed the presence of hematite.

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Authors and Affiliations

  1. Departmento de Física, Universidade Federal do Espirito Santo, 29060-900, Vitória, ES, Brazil

    O. D. Rodrigues, R. Garg, E. Galvõ da Silva, M. F. de Jesus Filho, U. B. Jayanthi, A. M. G. Figueiredo & V. K. Garg

  2. Departamento de Física, Universidade Federal de Minas Gerais, 31270, Belo Horizonte, MG, Brazil

    E. Galvõ da Silva

  3. Departamento de Química, Universidade Federal de Minas Gerais, 31270, Belo Horizonte, MG, Brazil

    M. F. de Jesus Filho

  4. Instituto Nacional de Pesquisas Espaciais, 12201 São, Jose dos Campos, SP, Brazil

    U. B. Jayanthi

  5. Instituto de Pesquisas Energéticas e Nucleares, São Paulo, SP, Brazil

    A. M. G. Figueiredo

Authors
  1. O. D. Rodrigues
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  2. R. Garg
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  3. E. Galvõ da Silva
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  4. M. F. de Jesus Filho
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  5. U. B. Jayanthi
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  6. A. M. G. Figueiredo
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  7. V. K. Garg
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Rodrigues, O.D., Garg, R., Galvõ da Silva, E. et al. A Mössbauer study of samples from an oil well. Hyperfine Interact 83, 379–384 (1994). https://doi.org/10.1007/BF02074303

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