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Silica-rich volcanism in the early solar system dated at 4.565 Ga

Author

Listed:
  • Poorna Srinivasan

    (University of New Mexico
    University of New Mexico)

  • Daniel R. Dunlap

    (Arizona State University)

  • Carl B. Agee

    (University of New Mexico
    University of New Mexico)

  • Meenakshi Wadhwa

    (Arizona State University)

  • Daniel Coleff

    (NASA Johnson Space Center)

  • Karen Ziegler

    (University of New Mexico
    University of New Mexico)

  • Ryan Zeigler

    (NASA Johnson Space Center)

  • Francis M. McCubbin

    (NASA Johnson Space Center)

Abstract

The ranges in chemical composition of ancient achondrite meteorites are key to understanding the diversity and geochemical evolution of planetary building blocks. These achondrites record the first episodes of volcanism and crust formation, the majority of which are basaltic. Here we report data on recently discovered volcanic meteorite Northwest Africa (NWA) 11119, which represents the first, and oldest, silica-rich (andesitic to dacitic) porphyritic extrusive crustal rock with an Al–Mg age of 4564.8 ± 0.3 Ma. This unique rock contains mm-sized vesicles/cavities and phenocrysts that are surrounded by quench melt. Additionally, it possesses the highest modal abundance (30 vol%) of free silica (i.e., tridymite) compared to all known meteorites. NWA 11119 substantially widens the range of volcanic rock compositions produced within the first 2.5–3.5 million years of Solar System history, and provides direct evidence that chemically evolved crustal rocks were forming on planetesimals prior to the assembly of the terrestrial planets.

Suggested Citation

  • Poorna Srinivasan & Daniel R. Dunlap & Carl B. Agee & Meenakshi Wadhwa & Daniel Coleff & Karen Ziegler & Ryan Zeigler & Francis M. McCubbin, 2018. "Silica-rich volcanism in the early solar system dated at 4.565 Ga," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05501-0
    DOI: 10.1038/s41467-018-05501-0
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    Cited by:

    1. 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 Rocco, 2023. "Igneous meteorites suggest Aluminium-26 heterogeneity in the early Solar Nebula," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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