A new primordial noble gas component in the solar system discovered in Ryugu asteroidOPEN ACCESS 

· by · in , , , ,

Alexander Verchovsky, Feargus Abernethy, Mahesh Anand, Ian Franchi and 31 more authors

Nature PREPRINT under review, Version 1, posted 05 Dec, 2023

LINK (OPEN ACCESS)
PDF (OPEN ACCESS)

“Ryugu is the C-type asteroid from which material was brought to Earth by the Hayabusa2 mission. A number of individual grains and fine-grained samples analysed so far for noble gases have indicated that solar wind and planetary (P1=Q) noble gases are present in Ryugu samples with concentrations higher than those observed in CIs, suggesting the former to be more primitive compared to the latter. We analysed three fine-grained samples from Ryugu, one of which contained a Xe concentration an order of magnitude higher (4×10-7 cc STP/g) than previously found in samples from Ryugu. Isotopically, this Xe resembles Q, but with a much stronger (by a factor of four) isotopic fractionation relative to solar wind and an 36Ar/132Xe ratio at least an order of magnitude lower than in P1. This new planetary primordial noble gas component (here termed P7) provides clues to constrain how the solar composition was fractionated to form the planetary components.”

Related posts (automatically generated):

  1. The noble gas and nitrogen relationship between Ryugu and carbonaceous chondritesOPEN ACCESS 
  2. Ryugu asteroid sample return provides a natural laboratory for primordial chemical evolutionOPEN ACCESS 
  3. Abundant presolar grains and primordial organics preserved in carbon-rich exogenous clasts in asteroid RyuguOPEN ACCESS 
  4. Influx of nitrogen-rich material from the outer Solar System indicated by iron nitride in Ryugu samplesOPEN ACCESS 
  5. Unraveling the Cr Isotopes of Ryugu: An Accurate Aqueous Alteration Age and the Least Thermally Processed Solar System MaterialOPEN ACCESS 
  6. Three-dimensional textures of Ryugu samples and their implications for the evolution of aqueous alteration in the Ryugu parent body
  7. Microstructural and chemical features of impact melts on Ryugu particle surfaces: Records of interplanetary dust hit on asteroid RyuguOPEN ACCESS 
  8. Nonequilibrium Spherulitic Magnetite In The Ryugu Samples
  9. Variations of the surface characteristics of Ryugu returned samplesOPEN ACCESS 
  10. Phyllosilicates with embedded Fe-based nanophases in Ryugu and Orgueil
Tags: , , , , , , ,