Skip to Main content Skip to Navigation
Journal articles

Mars' atmospheric neon suggests volatile-rich primitive mantle

Abstract : Martian atmospheric neon (Ne) has been detected by Viking and also found as trapped gas in Martian meteorites, though its abundance and isotopic composition have not been well determined. Because the timescale of Ne loss via atmospheric escape estimated from recent measurements with MAVEN is short (0.6-1 × 10 8 years), the abundance and isotope composition of Martian atmospheric Ne reflect recent atmospheric gas supply mostly from volcanic degassing. Thus, it can serve as a probe for the volatile content of the interior. Here we show that the tentatively-informed atmospheric Ne abundance suggests recent active volcanism and the mantle being richer in Ne than Earth's mantle today by more than a factor of 5-80. The estimated mantle Ne abundance requires efficient solar nebular gas capture or accretion of Ne-rich materials such as solar-wind-implanted dust in the planet formation stage, both of which provide important constraints on the abundance of other volatile elements in the interior and the accretion history of Mars. More precise determination of atmospheric Ne abundance and isotopic composition by in situ analysis or Mars sample return is crucial for distinguishing the possible origins of Ne.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03335472
Contributor : Catherine Cardon Connect in order to contact the contributor
Submitted on : Thursday, September 16, 2021 - 8:20:07 AM
Last modification on : Tuesday, November 16, 2021 - 4:19:00 AM

File

1-s2.0-S0019103521003419-main....
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

Hiroyuki Kurokawa, Yayoi Miura, Seiji Sugita, Yuichiro Cho, François Leblanc, et al.. Mars' atmospheric neon suggests volatile-rich primitive mantle. Icarus, Elsevier, 2021, 370 (December), pp.114685. ⟨10.1016/j.icarus.2021.114685⟩. ⟨insu-03335472v2⟩

Share

Metrics

Record views

42

Files downloads

41