- Names
-
- C. Lantz
- R. Brunetto
- M.-A. Barucci
- S. Fornasier
- D. Baklouti
- J. Bourçois
- M. Godard
- Title
- Ion irradiation of carbonaceous chondrites: A new view of space weathering on primitive asteroids
- Abstract
- We present an experimental study on ion irradiation of carbonaceous chondrites, simulating solar wind irradiation on primitive asteroids, to better constrain the space weathering processes of low albedo objects. The irradiations were performed on pressed pellets of the CV Allende, CO Frontier Mountain 95002 and Lancé, CM Mighei, CI Alais, and ungrouped Tagish Lake meteorites, as well as on some silicate samples (olivine and diopside). We used 40 keV He$^+$ with fluences up to 6 ×10$^16$ ions/cm$^2$ corresponding to timescales of 10$^3$ –10$^4$ years for an object in the Main Belt. Reflectance spectra were acquired ex situ before and after irradiations in the visible to mid-infrared range (0.4–16 μm). Several spectral modifications are observed. In the MIR range, we observe a shift of the phyllosilicates (near 3 and 10 μm) and silicates (near 10 μm) bands toward longer wavelength. In the visible-NIR range, spectral darkening and reddening are observed for some samples, while others show spectral brightening and blueing. Results are also compared with previous irradiation on ordinary and carbonaceous chondrites. We find that the spectral modifications in the visible range are correlated with the initial albedo/composition. We propose a model for space weathering effects on low albedo objects, showing that those with initial albedo between 5 and 9% shall not suffer SpWe effects in the visible range. These experiments provide new clues on spectroscopic features modifications within the visible-infrared ranges that could be detected in situ by future sample return missions (Hayabusa-2/JAXA and OSIRIS-REx/NASA).
- Keywords
- asteroids, surfaces, spectroscopy, meteorites, experimental techniques
- Content
- spectral data, planetary sciences, spectral data use
- Document type
- article
- Publication state
- published
- Doi
- 10.1016/j.icarus.2016.12.019
- Identifiers
- Experiment/Spectra
-
- Vis-NIR reflectance spectrum of the non-irradiated Alais pellet
- Vis-NIR reflectance spectrum of the Alais pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Alais pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Allende pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the non-irradiated FRO95002 pellet
- Vis-NIR reflectance spectrum of the FRO95002 pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the FRO95002 pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the FRO95002 pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the FRO95002 pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the non-irradiated Lancé pellet
- Vis-NIR reflectance spectrum of the Lancé pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Lancé pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Lancé pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Lancé pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the non-irradiated Mighei pellet
- Vis-NIR reflectance spectrum of the Mighei pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- NIR reflectance spectrum of the Allende pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the non-irradiated FRO95002 pellet
- NIR reflectance spectrum of the FRO95002 pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- NIR reflectance spectrum of the FRO95002 pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the FRO95002 pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Mighei pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Mighei pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Mighei pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the non-irradiated Tagish Lake pellet
- Vis-NIR reflectance spectrum of the Tagish Lake pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- NIR reflectance spectrum of the FRO95002 pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the non-irradiated Lancé pellet
- NIR reflectance spectrum of the Lancé pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- NIR reflectance spectrum of the Lancé pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the Lancé pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the non-irradiated Allende pellet
- Vis-NIR reflectance spectrum of the Allende pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Allende pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Allende pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Tagish Lake pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Tagish Lake pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Tagish Lake pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the non-irradiated Alais pellet
- Vis-NIR reflectance spectrum of the Alais pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Alais pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Alais pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Alais pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the non-irradiated Allende pellet
- NIR reflectance spectrum of the Allende pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- NIR reflectance spectrum of the Allende pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the Allende pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the Lancé pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the non-irradiated Mighei pellet
- NIR reflectance spectrum of the Mighei pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- NIR reflectance spectrum of the Mighei pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the Mighei pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the Mighei pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the non-irradiated Tagish Lake pellet
- NIR reflectance spectrum of the Tagish Lake pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $5.10^{15} ions.cm^{-2}$
- NIR reflectance spectrum of the Tagish Lake pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $1.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the Tagish Lake pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- NIR reflectance spectrum of the Tagish Lake pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Alais pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $3.10^{16} ions.cm^{-2}$
- Vis-NIR reflectance spectrum of the Alais pellet irradiated by $He^+$ ions at 40 keV and a total fluence of $6.10^{16} ions.cm^{-2}$
- Mid and Near-IR spectrum of an unirradiated area of the Allais meteorite pellet
- Mid and Near-IR spectrum of an irradiated area of the Allais meteorite pellet
- Mid and Near-IR spectrum of an unirradiated area of the Tagish Lake meteorite pellet
- Mid and Near-IR spectrum of an irradiated area of the Tagish Lake meteorite pellet
- Mid and Near-IR spectrum of an unirradiated area of the Mighei meteorite pellet
- Mid and Near-IR spectrum of an irradiated area of the Mighei meteorite pellet
- Mid and Near-IR spectrum of an unirradiated area of the Allende meteorite pellet
- Mid and Near-IR spectrum of an irradiated area of the Allende meteorite pellet
- Mid and Near-IR spectrum of an unirradiated area of the Lancé meteorite pellet
- Mid and Near-IR spectrum of an irradiated area of the Lancé meteorite pellet
- Mid and Near-IR spectrum of an unirradiated area of the Frontier Mountain 95002 meteorite pellet
- Mid and Near-IR spectrum of an irradiated area of the Frontier Mountain 95002 meteorite pellet