The initial solar system abundance of 60Fe and early core formation of the first asteroidsOPEN ACCESS 

· by · in , , , , , , , ,

Linru Fang, Frédéric Moynier, Marc Chaussidon, Angela Limare, Georgy V. Makhatadze, and Johan Villeneuve

Science Advances
8 Jan 2025
Vol 11, Issue 2

LINK (OPEN ACCESS)
PDF (OPEN ACCESS)

“High-precision Ni isotope analyses of the differentiated andesitic meteorite Erg Chech 002 (EC 002), the oldest known crustal fragment of a planetesimal, show that short-lived 60Fe was present in the early solar system with an initial 60Fe/56Fe ratio of (7.71 ± 0.47) × 10−9, which is five times more precise than previous estimates and is proposed to be the reference value for further studies. Using this ratio, the Ni isotopic composition of EC 002 implies that metal segregation in the source of the EC 002 parental melts took place 0.82−0.60+0.61 million years (Myr) after solar system formation, and similar very early metal-silicate differentiation ages are obtained for 4-Vesta (0.95−0.76+0.95 Myr) and the angrite parent body (2.27−1.29+1.98 Myr). Such an early age dictates a specific accretion and differentiation history for the EC 002 parent body, with metal segregation occurring at relatively low temperatures (1000° to 1200°C), followed by a high-temperature silicate melting event.”

Related posts (automatically generated):

  1. Half-life and initial Solar System abundance of 146Sm determined from the oldest andesitic meteoriteOPEN ACCESS 
  2. Core Formation and Internal Structure of Planetesimals: The Role of Formation Time, Accretion Duration, and Terminal Size
  3. An evolutionary system of mineralogy, Part IV: Planetesimal differentiation and impact mineralization (4566 to 4560 Ma)
  4. Possible Implications of Relatively High Levels of Initial 60Fe in Iron Meteorites for the Non-Carbonaceous — Carbonaceous Meteorite Dichotomy and Solar Nebula FormationOPEN ACCESS 
  5. Early metal-silicate differentiation during planetesimal formation revealed by acapulcoite and lodranite meteorites
  6. Early accretion of protoplanets inferred from a reduced inner solar system 26Al inventory
  7. Accretion timescales and style of asteroidal differentiation in an 26Al-poor protoplanetary disk
  8. Dynamical orbital evolution of asteroids and planetesimals across distinct chemical reservoirs due to accretion growth of planets in the early solar systemOPEN ACCESS 
  9. In Situ Constraints on the 60Fe Abundance in the Early Solar System
  10. The late accretion and erosion of Vesta’s crust recorded by eucrites and diogenites as an astrochemical window into the formation of Jupiter and the early evolution of the Solar SystemOPEN ACCESS 
Tags: , , , , , , , , , , ,