Saikia, Bhaskar J and Parthasarathy, G and Borah, Rashmi R
(2022)
Investigations of organic matter in meteorites using Fourier transform infrared and micro-Raman spectroscopic methods: Implications for origin of extraterrestrial organic matter.
Journal of Indian Geophysical Union, 26 (1).
pp. 1-15.
ISSN 0257-7968
| Abstract: |
We present here the evidence for the presence of organic matters in Dergaon, Mahadevpur and Natun Balijan ordinary chondrites using Fourier transforminfrared and micro-Raman spectroscopic technique. The Fourier transforminfrared spectrum of these ordinary chondrites in the range 2700–3000 cm-1 indicates the presence of CH3 asymmetric stretching, and CH2symmetric and asymmetric stretching modes due to aliphatic hydrocarbons. The micro-Raman spectrum exhibits the diamond and graphite peaks correspondingly at 1331 cm-1, 1349 cm-1 and 1588– 1618 cm-1. The full wave at half maximum value correspondingly 120 cm-1, 70 cm-1 and 17.5 cm-1for Dergaon, Mahadevpur and Natun Balijan, indicate the nature of disordered phase involved shock metamorphism in the meteorites. The diamond and graphite peaks intensity ratios of ~1.121, ~1.075 and ~0.532, correspondingly for Dergaon, Mahadevpur and Natun Balijan, indicates the disordered nature of graphite. This study has strong implications in understanding of the origin of organic matters in extra-terrestrial materials and origin of extraterrestrial life. |
| Item Type: |
Journal Paper
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| Subjects: |
School of Natural and Engineering Sciences > Others |
| Divisions: |
Schools > Natural Sciences and Engineering |
| Date Deposited: |
20 Feb 2026 10:33 |
| Last Modified: |
20 Feb 2026 10:33 |
| Official URL: |
https://iguonline.in/journal/viewpostsnew.php?urlV... |
| Related URLs: |
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| Funders: |
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| Projects: |
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| DOI: |
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| URI: |
http://eprints.nias.res.in/id/eprint/3183 |
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