Nanoscale Infrared Characterization of Dark Clasts and Fine-Grained Rims in CM2 Chondrites: Aguas Zarcas and Jbilet Winselwan

Yeşiltaş, Mehmet; Glotch, T. D.; Kaya, Melike

doi:10.1021/acsearthspacechem.1c00290

Cited by 8 publications

(4 citation statements)

References 112 publications

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“…Mid‐infrared FT‐IR spectra can be useful for the characterization of chemical composition of carbonaceous chondrites (e.g., Bates et al., 2020, 2021; Kebukawa, Alexander, et al., 2019; Kebukawa, Ito, et al., 2019; Kebukawa et al., 2020; King et al., 2015, 2019; King, Schofield, et al., 2021; Miyamoto & Zolensky, 1994; Morlok et al., 2020; Potin et al., 2020; Takir et al., 2013, 2019; Yesiltas, Glotch, & Kaya, 2021; Yesiltas, Glotch, & Sava, 2021; Yesiltas et al., 2017). Figure 8a presents mid‐infrared spectra of Tarda, Tagish Lake, Aguas Zarcas, Jbilet Winselwan, and Allende together with spectra of other carbonaceous chondrites from Kebukawa, Alexander, et al.…”

Section: Resultsmentioning

confidence: 99%

Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites

Yeşiltaş

Kebukawa

Glotch

et al. 2022

Meteorit & Planetary Scien

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Ungrouped carbonaceous chondrites are not easily classified into one of the well‐established groups due to compositional/petrological differences and geochemical anomalies. Type 2 ungrouped carbonaceous chondrites represent a very small fraction of all carbonaceous chondrites. They can potentially represent different aspects of asteroids and their regolith material. By conducting a multitechnique investigation, we show that Queen Alexandra Range (QUE) 99038 and Elephant Moraine (EET) 83226 do not resemble type 2 carbonaceous chondrites. QUE 99038 exhibits coarse‐grained matrix, Fe‐rich rims on olivines, and an apparent lack of tochilinite, suggesting that QUE 99038 has been metamorphosed. Its polyaromatic organic matter structures closely resemble oxidized CV3 chondrites. EET 83226 exhibits a clastic texture with high porosity and shows similarities to CO3 chondrites. It consists of numerous large chondrules with fine‐grained rims that are often fragmented and discontinuous and set within matrix, suggesting a formation mechanism for the rims in a regolith environment. The kind of processes that can result in such chemical compositions as in QUE 99038 and EET 83226 is currently not fully known and clearly presents a conundrum. Tarda is a highly friable carbonaceous chondrite with close resemblance to Tagish Lake (ungrouped C2 chondrite). It comprises different types of chondrules (some with Fe‐rich rims), framboid magnetite, sulfides, carbonates, and phyllosilicate‐ and carbon‐rich matrix, and is consistent with being an ungrouped C2 chondrite.

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Section: Resultsmentioning

confidence: 99%

Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites

Yeşiltaş

Kebukawa

Glotch

et al. 2022

Meteorit & Planetary Scien

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“…Novel analytical techniques with nanoscale spatial resolution are clearly required to detect and characterize this organic matter within extraterrestrial astromaterials, such as returned samples from asteroids and other planetary bodies. Scattering‐type near‐field optical microscopy (s‐SNOM)‐based nanoscale Fourier transform infrared (nano‐FTIR) spectroscopy is a robust and useful technique providing exceptional spatial resolution down to 5 nm (Mastel et al., 2018) and detection capabilities without the optical limitations of conventional IR spectroscopy (Amarie et al., 2012; Huth et al., 2012; Yesiltas, Glotch, & Kaya, 2021; Yesiltas, Glotch, & Sava, 2021; Young et al., 2022). By utilizing an apertureless near‐field optical microscope, both the essential information and the background signals arising from sources like the AFM tip shaft and far‐field emissions from the sample under examination are captured.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Spectroscopic Identification and Characterization of Minerals and Organic Matter in Ryugu Particles

Yesiltas,

Glotch,

Kebukawa

et al. 2024

JGR Planets

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Carbonaceous asteroids are leftover materials from the early solar system. They did not undergo planetary differentiation processes and thus still retained signatures and clues of the origin and evolution of the solar system. Thus, samples of carbonaceous asteroids provide significant potential for deciphering the origin of the solar system. The Hayabusa2 spacecraft returned the first samples of a carbonaceous asteroid (162173) Ryugu. In this work, we report the nanoscale mineralogy and organic matter content of two Ryugu particles, A0030 and C0034. These were analyzed by highly novel scattering‐type scanning near‐field optical microscopy (s‐SNOM)‐based nanoscale‐Fourier transform infrared (nano‐FTIR) spectroscopy with ∼20 nm spatial resolution. The nano‐FTIR measurements were supported by confocal micro‐Raman imaging and spectroscopy (∼500 nm/pixel spatial sampling). Our investigations show that the two Ryugu particles (a) contain different silicate mineralogies, indicating heterogeneous and incomplete aqueous alteration and (b) are highly rich in organic matter, consisting a variety of molecular functional groups. The spatial distributions of chemical functional groups and their associations based on pseudo‐heterodyne (PsHet) SNOM imaging show that the organic matter is distributed as either diffused or discrete grains. Micro‐Raman spectra show that the Ryugu particles experienced minimal thermal metamorphism, although A0030 was slightly more heated than C0034. The identification of abundant nanoscale organic molecules within the Ryugu grains that could not be identified via micrometer‐scale investigations emphasizes the importance of using nanoscale nondestructive methods for studying primitive solar system materials, such as Ryugu and OSIRIS‐Rex particles and those that will be returned in the future (such as MMX samples).

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“…The main limitation of classic infrared microspectroscopy (µ-FTIR) is diffraction, which limits the best achievable lateral resolution to a few microns, even with synchrotron techniques. To overcome this diffraction limit, near-field infrared techniques such as scattering-type near-field scanning optical microscopy (s-SNOM; Dominguez et al 2014;Yesiltas et al 2021) and infrared photothermal nanospectroscopy (AFM-IR) can be used. The AFM-IR measurement is based on the detection of photothermal expansion of samples during IR absorption (Dazzi et al 2005).…”

Section: Introductionmentioning

confidence: 99%

AFM-IR nanospectroscopy of nanoglobule-like particles in Ryugu samples returned by the Hayabusa2 mission

Mathurin,

Bejach,

Dartois

et al. 2024

A&A

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The JAXA Hayabusa2 mission returned well-preserved samples collected from the carbonaceous asteroid Ryugu, providing unique non-terrestrially weathered samples from a known parent body. This work aims to provide a better understanding of the formation and evolution of primitive asteroidal matter by studying the fine scale association of organic matter and minerals in Ryugu samples. We characterized the samples by IR nanospectroscopy using the AFM-IR technique. This technique overcomes the diffraction limit (of several microns) of conventional infrared microspectroscopy (µ-FTIR). The samples were mapped in the mid-IR range at a lateral spatial resolution about a hundred times better than with µ-FTIR. This provided us with unique in situ access to the distribution of the different infrared signatures of organic components at the sub-micron scale present in the Ryugu whole-rock samples as well as to the characterization of the compositional variability of Ryugu in the insoluble organic matter (IOM) chemically extracted from the Ryugu samples. The AFM-IR maps of whole-rock particles and IOM residues from Ryugu samples were recorded with a lateral resolution of tens of nanometers. Spectra were recorded in the 1900-900 cm$^−1$ spectral range by AFM-IR (Icon-IR) for all samples, and additional spectra were recorded from 2700 to 4000 cm$^−1$ for one IOM sample by an optical photothermal IR (O-PTIR) technique using a mIRage$^ textregistered $ IR microscope. Organic matter is present in two forms in the whole-rock samples: as a diffuse phase intermixed with the phyllosilicate matrix and as individual organic nanoparticles. We identify the Ryugu organic nanoparticles as nanoglobule-like inclusions texturally resembling nanoglobules present in primitive meteorites. Using AFM-IR, we record for the first time the infrared spectra of Ryugu organic nanoparticles that clearly show enhanced carbonyl (C=O) and CH contributions with respect to the diffuse organic matter in Ryugu whole-rock and IOM residue.

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Nanoscale Infrared Characterization of Dark Clasts and Fine-Grained Rims in CM2 Chondrites: Aguas Zarcas and Jbilet Winselwan

Cited by 8 publications

References 112 publications

Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites

Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites

Nanoscale Spectroscopic Identification and Characterization of Minerals and Organic Matter in Ryugu Particles

AFM-IR nanospectroscopy of nanoglobule-like particles in Ryugu samples returned by the Hayabusa2 mission

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