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.

Dublin Core

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Young, J. M.</dc:creator>
  <dc:creator>Glotch, T. D.</dc:creator>
  <dc:creator>Yesiltas, M.</dc:creator>
  <dc:creator>Hamilton, V. E.</dc:creator>
  <dc:creator>Breitenfeld, L. B.</dc:creator>
  <dc:creator>Bechtel, H. A.</dc:creator>
  <dc:creator>Corder, S. N. Gilbert</dc:creator>
  <dc:creator>Yao, Z.</dc:creator>
  <dc:date>2022-01-01</dc:date>
  <dc:description>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.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/260789</dc:identifier>
  <dc:identifier>oai:aperta.ulakbim.gov.tr:260789</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS 127(5)</dc:source>
  <dc:title>Nano-FTIR Investigation of the CM Chondrite Allan Hills 83100</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>