Early accretion of water and volatile elements to the inner Solar System: evidence from angrites

· by · in , , , ,

Adam R. Sarafian, Erik H. Hauri, Francis M. McCubbin, Thomas J. Lapen, Eve L. Berger, Sune G. Nielsen, Horst R. Marschall, Glenn A. Gaetani, Kevin Righter, Emily Sarafian

Phil. Trans. R. Soc. A 2017 375 20160209
DOI: 10.1098/rsta.2016.0209.
Published 17 April 2017

LINK

“Inner Solar System bodies are depleted in volatile elements relative to chondrite meteorites, yet the source(s) and mechanism(s) of volatile-element depletion and/or enrichment are poorly constrained. The timing, mechanisms and quantities of volatile elements present in the early inner Solar System have vast implications for diverse processes, from planetary differentiation to the emergence of life. We report major, trace and volatile-element contents of a glass bead derived from the D’Orbigny angrite, the hydrogen isotopic composition of this glass bead and that of coexisting olivine and silicophosphates, and the 207Pb–206Pb age of the silicophosphates, 4568 ± 20 Ma. We use volatile saturation models to demonstrate that the angrite parent body must have been a major body in the early inner Solar System. We further show via mixing calculations that all inner Solar System bodies accreted volatile elements with carbonaceous chondrite H and N isotope signatures extremely early in Solar System history. Only a small portion (if any) of comets and gaseous nebular H species contributed to the volatile content of the inner Solar System bodies.

This article is part of the themed issue ‘The origin, history and role of water in the evolution of the inner Solar System’.”

Related posts (automatically generated):

  1. Accretion of water in carbonaceous chondrites: current evidence and implications for the delivery of water to early EarthOPEN ACCESS 
  2. Early accretion of protoplanets inferred from a reduced inner solar system 26Al inventory
  3. Potassium isotope heterogeneity in the early Solar System controlled by extensive evaporation and partial recondensationOPEN ACCESS 
  4. Distinct 238U/235U ratios and REE patterns in plutonic and volcanic angrites: Geochronologic implications and evidence for U isotope fractionation during magmatic processes
  5. Rubidium isotopic composition of the Earth, meteorites, and the Moon: Evidence for the origin of volatile loss during planetary accretionOPEN ACCESS 
  6. Early accretion of water in the inner solar system from a carbonaceous chondrite–like source
  7. Carbon isotopic variation in ureilites: Evidence for an early, volatile-rich Inner Solar System
  8. An experimental assessment of the potential of sulfide saturation of the source regions of eucrites and angrites: implications for asteroidal models of core formation, late accretion and volatile element depletions
  9. Angrite meteorites record the onset and flux of water to the inner solar system
  10. Accretion and differentiation of the terrestrial planets with implications for the compositions of early-formed Solar System bodies and accretion of water
Tags: , , , ,