The Absolute Chronology and Thermal Processing of Solids in the Solar Protoplanetary Disk
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- James N. Connelly
- Centre for Star and Planet Formation and Natural History Museum of Denmark, University of Copenhagen, DK-1350 Copenhagen, Denmark.
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- Martin Bizzarro
- Centre for Star and Planet Formation and Natural History Museum of Denmark, University of Copenhagen, DK-1350 Copenhagen, Denmark.
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- Alexander N. Krot
- Centre for Star and Planet Formation and Natural History Museum of Denmark, University of Copenhagen, DK-1350 Copenhagen, Denmark.
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- Åke Nordlund
- Centre for Star and Planet Formation and Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark.
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- Daniel Wielandt
- Centre for Star and Planet Formation and Natural History Museum of Denmark, University of Copenhagen, DK-1350 Copenhagen, Denmark.
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- Marina A. Ivanova
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Moscow 119991, Russia.
説明
<jats:title>Dating the First Solids</jats:title> <jats:p> The solar system's first solids: calcium-aluminum–rich inclusions and chondrules are found in meteorites and provide a direct record of the dynamics of the solar protoplanetary disk that led to the formation of the solar system. Previous results indicate that chondrules formed 1 to 2 million years after the inclusions—an age difference that has been used in constructing models of chondrule formation. Based on uranium- and lead-isotope measurements of a collection of these primitive materials, <jats:bold> Connelly <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="651" related-article-type="in-this-issue" vol="338" xlink:href="10.1126/science.1226919">651</jats:related-article> ) show that chondrules in fact started to form at the same time as the inclusions, 4.567 billion years ago, and that their formation took about 3 million years. </jats:p>
収録刊行物
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- Science
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Science 338 (6107), 651-655, 2012-11-02
American Association for the Advancement of Science (AAAS)
