Evolution of hematite and/or magnetite iron phases with thermal heating in ordinary chondrites: A generic characteristic

· by · in , , ,

Ambesh Dixit, Beena Bhatia & R P Tripathi

Journal of Earth System Science, Volume 130, Article number: 191 (2021)

LINK

“We used 57Fe Mössbauer spectroscopic measurements on untreated and controlled thermally treated Ararki, Didwana, and Bhawad ordinary chondritic meteorites to understand the evolution of different iron phases with temperature. The samples were subjected to different heating temperatures and room temperature Mössbauer spectra were collected after cooling down these samples. The untreated meteorite samples showed the presence of olivine, pyroxene, troilite, and Fe–Ni alloy (kamacite/taenite) minerals. The decomposition of such iron based minerals started at or above 600°C towards hematite iron phase for all these meteorites. More interestingly, at about 1000°C or above, all initial mineral phases got converted into either hematite and/or magnetite. The present study provides a clue to understand the mechanism of conversion of minerals in ordinary chondrites.”

Related posts (automatically generated):

  1. Textural properties of iron-rich phases in H ordinary chondrites and quantitative links to the degree of thermal metamorphism
  2. Comparison of iron-bearing minerals in ordinary chondrites from H, L and LL groups using Mössbauer spectroscopy with a high velocity resolution
  3. The 57Fe hyperfine interactions in the iron-bearing phases in some LL ordinary chondrites
  4. Brecciation among 2280 ordinary chondrites – constraints on the evolution of their parent bodies
  5. Plagioclase alteration and equilibration in ordinary chondrites: Metasomatism during thermal metamorphism
  6. Primordial, thermal, and shock features of ordinary chondrites: Emulating bulk X‐ray diffraction using in‐plane rotation of polished thin sections
  7. Mössbauer spectroscopy of H, L and LL ordinary chondrites
  8. Application of Mössbauer spectroscopy, multidimensional discriminant analysis, and Mahalanobis distance for classification of equilibrated ordinary chondritesOPEN ACCESS 
  9. Thermal emission measurements of ordinary chondrite mineral analogs in a simulated asteroid environment: 2. Representative mineral mixtures
  10. Relationships among physical properties as indicators of high temperature deformation or post-shock thermal annealing in ordinary chondrites
Tags: , , , , ,