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Cathodoluminescence study of Calcite in Martian meteorite

Cathodoluminescence study of Calcite in Martian meteorite. NASA. T. Nakazato, M. Kayama, H. Nishido, K. Ninagawa, A. Gucsik, and Sz. B é rczi. Research Institute of Natural Science, Okayama University of Science Department of Applied Physics, Okayama University of Science

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Cathodoluminescence study of Calcite in Martian meteorite

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  1. Cathodoluminescence study of Calcite in Martian meteorite NASA T. Nakazato, M. Kayama, H. Nishido, K. Ninagawa, A. Gucsik, and Sz. Bérczi Research Institute of Natural Science, Okayama University of Science Department of Applied Physics, Okayama University of Science Max Planck Institute for Chemistry, Department of Geochemistry Eötvös University, Institute of Physics, Dept. G. Physics, Cosmic Materials Space NASA

  2. Introduction NASA CL and Raman spectroscopy were carried out on Dhofar 019 for origin of calcite. NASA NASA

  3. SNC : Martian meteorites Shergottite • Olivine bearing Basaltic Shergottite • Augite , Pigeonite , Maskelynite • Lherzolitic Shergottite • Olivine , Pyroxene Shergottite Shergottite 1865India Shergotty Nakhlite1911Egypt Nakhla Chassignite1815France Chassgny Nakhlite Chassignite

  4. Classification : Olivine bearing Basaltic Shergottite Constituent minerals : Pyroxene, Olivine, Maskelynite, merrillite and calcite Shock pressure : 30 GPa or more Formation age :~ 500Ma Exposure age :~ 15 million years Finding : Oman desert Weight : 1,056 g No fusion crust Sample (Dhofar 019) Photograph of Dhofar 019 Dhofar region

  5. Color CL images of Dhofar 019 S L 5mm Color CL image of Dhofar 019 : measured area Vein

  6. CL spectra of calcite ( S and L ) S L BSE image of calcite (S , L) measurement condition 15kv, 1.0nA CL spectra of calcite (S and L)

  7. CL spectrum of calcite ( Vein ) Vein BSE image of calcite (Vein) measurement condition 15kv, 1.0nA CL spectrum of calcite (Vein)

  8. CL spectra of calcite S L BSE image of calcite (S and L) Vein CL spectra of calcite in Dhofar019 and terrestrial calcite BSE image of calcite (Vein)

  9. Raman spectra of calcite measurement condition light source : Ar-laser, 514.5nm power : 400 mW Raman spectra of calcite in Dhofar019 and terrestrial calcite

  10. S (cm-1) 151 276 712 1086 --- L (cm-1) 143 266 712 1084 --- Terrestrial (cm-1) 154 281 713 1087 1438 Vein (cm-1) 154 281 713 1087 1438 Raman peak shift of calcite Wave numbers of Raman peaks

  11. S (cm-1) 151 276 712 1086 --- L (cm-1) 143 266 712 1084 --- Terrestrial (cm-1) 154 281 713 1087 1438 Vein (cm-1) 154 281 713 1087 1438 Raman peak shift of calcite Wave numbers of Raman peaks

  12. Conclusion CL spectra • Calcite in Dhofar 019 shows different spectra from terrestrial one. Raman spectra • Calcite in Dhofar 019 show weaker Raman peak than terrestrial one. Calcite in Dhofar019 Martian origin

  13. Thank you, very much.

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