Abstract:
:The most abundant components of primitive meteorites (chondrites) are millimeter-sized glassy spherical chondrules formed by transient melting events in the solar protoplanetary disk. Using Pb-Pb dates of 22 individual chondrules, we show that primary production of chondrules in the early solar system was restricted to the first million years after the formation of the Sun and that these existing chondrules were recycled for the remaining lifetime of the protoplanetary disk. This finding is consistent with a primary chondrule formation episode during the early high-mass accretion phase of the protoplanetary disk that transitions into a longer period of chondrule reworking. An abundance of chondrules at early times provides the precursor material required to drive the efficient and rapid formation of planetary objects via chondrule accretion.
journal_name
Sci Advjournal_title
Science advancesauthors
Bollard J,Connelly JN,Whitehouse MJ,Pringle EA,Bonal L,Jørgensen JK,Nordlund Å,Moynier F,Bizzarro Mdoi
10.1126/sciadv.1700407subject
Has Abstractpub_date
2017-08-09 00:00:00pages
e1700407issue
8issn
2375-2548pii
1700407journal_volume
3pub_type
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