Igneous meteorites suggest Aluminium-26 heterogeneity in the early Solar NebulaOPEN ACCESS 

· by · in , ,

Evgenii Krestianinov, Yuri Amelin, Qing-Zhu Yin, Paige Cary, Magdalena H. Huyskens, Audrey Miller, Supratim Dey, Yuki Hibiya, Haolan Tang, Edward D. Young, Andreas Pack & Tommaso Di Rocco

Nature Communications, Volume 14, Article number: 4940

LINK (OPEN ACCESS)
PDF (OPEN ACCESS)

“The short-lived radionuclide aluminium-26 (26Al) isotope is a major heat source for early planetary melting. The aluminium-26 – magnesium-26 (26Al-26Mg) decay system also serves as a high-resolution relative chronometer. In both cases, however, it is critical to establish whether 26Al was homogeneously or heterogeneously distributed throughout the solar nebula. Here we report a precise lead-207 – lead-206 (207Pb-206Pb) isotopic age of 4565.56 ± 0.12 million years (Ma) for the andesitic achondrite Erg Chech 002. Our analysis, in conjunction with published 26Al-26Mg data, reveals that the initial 26Al/27Al in the source material of this achondrite was notably higher than in various other well-preserved and precisely dated achondrites. Here we demonstrate that the current data clearly indicate spatial heterogeneity of 26Al by a factor of 3-4 in the precursor molecular cloud or the protoplanetary disk of the Solar System, likely associated with the late infall of stellar materials with freshly synthesized radionuclides.”

Related posts (automatically generated):

  1. Evidence for Very Early Planetesimal Formation and 26Al/27Al Heterogeneity in the Protoplanetary DiskOPEN ACCESS 
  2. Oxygen isotopic heterogeneity in the early Solar System inherited from the protosolar molecular cloudOPEN ACCESS 
  3. Evaluating the O‐Cr‐Mo isotope signatures in various meteorites representing core–mantle–crust fragments: Implications for partially differentiated planetesimal(s) accreted in the early outer solar system
  4. Nucleosynthetic vanadium isotope heterogeneity of the early solar system recorded in chondritic meteoritesOPEN ACCESS 
  5. Early silicic magmatism on a differentiated asteroid
  6. Early solar irradiation as a source of the inner solar system chromium isotopic heterogeneityOPEN ACCESS 
  7. Silica-rich volcanism in the early solar system dated at 4.565 GaOPEN ACCESS 
  8. Atomic-scale Evidence for Open-system Thermodynamics in the Early Solar NebulaOPEN ACCESS 
  9. Carbonaceous Achondrites Northwest Africa 6704/6693: Milestones for Early Solar System Chronology and Genealogy
  10. Early Differentiation in the Carbonaceous Chondrite Forming Region of the Solar Nebula: New Insight from the Achondrites Northwest Africa 7680/6962
Tags: , , , , , , ,