Carbonaceous-chondrite inclusions in the Kapoeta achondritic meteorite studied by Mössbauer spectroscopy

· by · in ,

Yassir A. Abdu

Hyperfine Interactions, Volume 242, Article number: 5 (2021)
Published: 13 October 2021

LINK

“Kapoeta is an achondrite meteorite containing mm-sized carbonaceous-chondrite inclusions that are thought to have been incorporated into its parent body by carbonaceous-chondrite impactors (mainly CM “Mighei-type” material). Two different samples (A and B) of the Kapoeta carbonaceous-chondrite materials are studied by Mössbauer spectroscopy at room temperature. The Mössbauer spectra are fitted with a combination of Fe2+ and Fe3+ quadrupole doublets using a Voigt-based function. The spectrum of sample A shows two Fe2+ doublets and one Fe3+ doublet, with Fe3+ accounting for 64% of the total spectral area, and are ascribed to hydrated phyllosilicates. Sample-B spectrum, on the other hand, shows three doublets that are due to Fe2+ only, and are attributed mainly to amorphous silicates (predominantly dehydrated amorphous phyllosilicates) and presence of small amounts of olivine. The results are compared with published Mössbauer data on carbonaceous chondrites, and discussed in relation to aqueous alteration that occurred in their parent bodies and the thermal history the Kapoeta meteorite.”

Related posts (automatically generated):

  1. Infrared Spectroscopy of Carbonaceous-chondrite Inclusions in the Kapoeta Meteorite: Discovery of Nanodiamonds with New Spectral Features and Astrophysical Implications
  2. NanoSIMS isotopic investigation of xenolithic carbonaceous clasts from the Kapoeta howarditeOPEN ACCESS 
  3. Bjurböle L/LL4 ordinary chondrite properties studied by raman spectroscopy, x-ray diffraction, magnetization measurements and mössbauer spectroscopy
  4. The interior and the fusion crust in Sariçiçek howardite: Study using X-ray diffraction, magnetization measurements and Mössbauer spectroscopy
  5. Fe2+ partitioning between the M1 and M2 sites in silicate crystals in some stony and stony-iron meteorites studied using X-ray diffraction and Mössbauer spectroscopy
  6. Variability of Chelyabinsk meteoroid stones studied by Mössbauer spectroscopy and X-ray diffraction
  7. Rheasilvia provenance of the Kapoeta howardite inferred from image 40Ar/39Ar feldspar ages
  8. Temperature constraints by Raman spectroscopy of organic matter in volatile-rich clasts and carbonaceous chondrites
  9. Characterization of Kemer L4 meteorite using Raman spectroscopy, X-ray diffraction, magnetization measurements and Mössbauer spectroscopy
  10. Study of Bursa L6 ordinary chondrite by X‐ray diffraction, magnetization measurements, and Mössbauer spectroscopy
Tags: , , , , ,