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Biconical reflectance, micro‐Raman, and nano‐FTIR spectroscopy of the Didim (H3‐5) meteorite: Chemical content and molecular variations

Yesiltas, M. and Kaya, M. and Glotch, T.D. and Brunetto, R. and Maturilli, Alessandro and Helbert, Jörn and Ozel, M. E. (2020) Biconical reflectance, micro‐Raman, and nano‐FTIR spectroscopy of the Didim (H3‐5) meteorite: Chemical content and molecular variations. Meteoritics & Planetary Science, 55 (11), pp. 2404-2421. Wiley. doi: 10.1111/maps.13585. ISSN 1086-9379.

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Official URL: https://onlinelibrary.wiley.com/doi/10.1111/maps.13585

Abstract

The Didim meteorite contains multiple lithologies and clasts of different petrologic types in a single stone. A mixture of H5 clasts in an unequilibrated H3 host was previously observed in Didim, according to the initial characterization reported in the Meteoritical Bulletin Database, providing an opportunity to investigate molecular composition that contains varying degree of equilibrium with varying mineralogy. We have taken a “from large scale to small scale” approach to spectroscopically investigate the chemical content of Didim. Centimeter-scale biconical reflectance spectra show that Didim contains abundant olivine, pyroxene, and other optically active minerals, evident from a strong Band I near 0.93 µm and a weak Band II near 1.75 µm. Micrometer-scale Raman spectroscopic investigations reveal the presence of carbonaceous material in addition to forsteritic olivine, pyroxene (augite and enstatite), feldspars, and opaque phases such as chromite and hematite. 3-D Raman tomographic imaging shows that the carbonaceous material near chondrules extends underneath a large olivine grain, going further down toward the interior, indicating that the observed carbonaceous matter is likely indigenous. Nano-scale infrared measurements reveal that the observed chemical materials in Didim contain spectral, and therefore, molecular, variations at the ~20 nm spatial scale. These chemical variations are normally not accessible via conventional infrared techniques, and indicate the presence of different cations in the molecular composition of observed minerals. By taking the “large scale to small scale” approach, we show that these compositional variations can be captured and investigated nondestructively in meteorites to understand formation/evolution of chemical components in the parent body.

Item URL in elib:https://elib.dlr.de/142569/
Document Type:Article
Title:Biconical reflectance, micro‐Raman, and nano‐FTIR spectroscopy of the Didim (H3‐5) meteorite: Chemical content and molecular variations
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Yesiltas, M.Faculty of Aeronautics and Space Sciences, Kirklareli University, Kirklareli, 39100 TurkeyUNSPECIFIED
Kaya, M.Institute of Acceleration Technologies, Ankara University, Ankara, 06830 TurkeyUNSPECIFIED
Glotch, T.D.Dept. Geosciences, Stony Brook University, Stony Brook, NY 11794UNSPECIFIED
Brunetto, R.INAF- Catania Astrophysical ObservatoryUNSPECIFIED
Maturilli, AlessandroAlessandro.Maturilli (at) dlr.dehttps://orcid.org/0000-0003-4613-9799
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Ozel, M. E.Space Sciences and Solar Energy Research and Application Center, Cukurova University, Adana, 01380 TurkeyUNSPECIFIED
Date:2020
Journal or Publication Title:Meteoritics & Planetary Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:55
DOI :10.1111/maps.13585
Page Range:pp. 2404-2421
Publisher:Wiley
ISSN:1086-9379
Status:Published
Keywords:Raman, Spektroskopie, Meteoriten
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Laboratories
Deposited By: Helbert, Dr.rer.nat. Jörn
Deposited On:03 Jun 2021 07:12
Last Modified:20 Jun 2021 15:55

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