1 Ocak 2022 Dergi makalesi Açık Erişim

Young, J. M.; Glotch, T. D.; Yesiltas, M.; Hamilton, V. E.; Breitenfeld, L. B.; Bechtel, H. A.; Corder, S. N. Gilbert; Yao, Z.

Citation Style Language JSON

{
  "DOI": "10.1029/2021JE007166", 
  "abstract": "Mid-infrared (MIR) spectroscopy has been used with great success to quantitatively determine the mineralogy of geologic samples. It has been employed in a variety of contexts from determining bulk composition of powdered samples to spectroscopic imaging of rock thin sections via micro-Fourier transform infrared (micro-FTIR) imaging spectroscopy. Recent advances allow for IR measurements at the nanoscale. Near field nanoscale infrared imaging and spectroscopy with a broadband source (nano-FTIR) enable understanding of the spatial relationships between compositionally distinct materials within a sample. This will be of particular use when analyzing returned samples from Bennu and Ryugu, which are thought to be compositionally like CI or CM1/2 carbonaceous chondrites. Returned samples will likely contain olivine/pyroxene chondrules that have been transformed into hydrous phyllosilicates, sulfides, carbonates, and other alteration phases. The use of near-field infrared techniques to probe the boundaries between once pristine chondrules and alteration phases at the nanoscale is a novel approach to furthering our understanding of the compositional evolution of carbonaceous asteroids and the processes that drive their evolution. Here we report the results of nano-FTIR spectroscopy and imaging measurements performed on the carbonaceous chondrite Allan Hills (ALH) 83100 (CM1/2). We show with nanoscale resolution that spatially resolved Fe-Mg variations exist within the phyllosilicates around a chondrule rim. We also present effects of crystal orientation on the nano-FTIR spectra to account for the spectral differences between the meteorite and mineral spectra.", 
  "author": [
    {
      "family": "Young", 
      "given": " J. M."
    }, 
    {
      "family": "Glotch", 
      "given": " T. D."
    }, 
    {
      "family": "Yesiltas", 
      "given": " M."
    }, 
    {
      "family": "Hamilton", 
      "given": " V. E."
    }, 
    {
      "family": "Breitenfeld", 
      "given": " L. B."
    }, 
    {
      "family": "Bechtel", 
      "given": " H. A."
    }, 
    {
      "family": "Corder", 
      "given": " S. N. Gilbert"
    }, 
    {
      "family": "Yao", 
      "given": " Z."
    }
  ], 
  "container_title": "JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS", 
  "id": "260789", 
  "issue": "5", 
  "issued": {
    "date-parts": [
      [
        2022, 
        1, 
        1
      ]
    ]
  }, 
  "title": "Nano-FTIR Investigation of the CM Chondrite Allan Hills 83100", 
  "type": "article-journal", 
  "volume": "127"
}