Abstract
Nitrogen isotopic composition and abundances of eleven ordinary chondrites (OCs), Mahadevpur (H4/5), Didwana-Rajod (H5), Monahans (1998) (H5), Portales Valley (H6), Itawa Bhopji (L3/5), Jodiya (L5), Jalangi (L5/6), Kaprada (L5/6), Devri-Khera (L6), Katol (L6) and Bruderheim (L6) have been determined. Ranges of nitrogen isotopic composition, \(\delta ^{15}\)N for individual subgroups of OCs in bulk samples are, H: −41.0 ± 5.8\(\permil \) to +75.1 ± 10.9\(\permil \), L: −168.7 ± 23.9\(\permil \) to +64.2 ± 3.4\(\permil \), LL: −74.0 ± 24.0\(\permil \) to +30.9 ± 5.4\(\permil \), respectively. Trapped N shows 15N enriched isotopic signatures in the bulk ordinary chondrites (H, L, and LL) compared to the solar wind and are also distinct from that of phase-Q. The ranges of nitrogen concentration in bulk samples of OCs are, H: 0.37 ppm to 39.2 ppm, L: 0.25 ppm to 39.4 ppm and LL: 0.35 ppm to 12.7 ppm, respectively. No significant correlation between N isotopic composition and N concentration in OCs is observed with their petrologic type.
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Mahajan, R.R. Nitrogen isotopic ratio and abundance in selected ordinary chondrites: clues for their formation in proto-planetary disk. Astrophys Space Sci 368, 101 (2023). https://doi.org/10.1007/s10509-023-04260-9
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DOI: https://doi.org/10.1007/s10509-023-04260-9