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- Title
Evolution of protoplanetary disk inferred from <sup>26</sup>Al chronology of individual chondrules.
- Authors
KITA, Noriko T.; USHIKUBO, Takayuki
- Abstract
- We review the 26Al ages of chondrules in various type 3.0 chondrites. The 26Al ages of chondrules are 1-3 Myr after calcium-aluminum-rich inclusion (CAI) for LL3.0, CO3.0, and Acfer 094 (Ungrouped C 3.0). Available data for chondrules in CR chondrites indicate that many chondrules are relatively younger (≥3 Myr), although data from chondrules in CR3.0 are not yet available to confirm their younger ages. The total ranges for the 26Al ages of chondrules in a single chondrite group are more than 0.5-1 Myr. However, most chondrules show relatively narrow range of ages in a single chondrite group (0.2-0.4 Myr, 1 SD), which might be short enough to preserve the group-specific chemical and isotope signatures against radial diffusion of solid in the disk. Distinct oxygen isotope reservoirs might exist in the protoplanetary disk simultaneously, which could be spatially separated.
- Subjects
PROTOPLANETARY disks; ALUMINUM isotopes; CHONDRULES; CALCIUM; DIFFUSION; CHRONOLOGY; OXYGEN isotopes
- Publication
Meteoritics & Planetary Science, 2012, Vol 47, Issue 7, p1108
- ISSN
1086-9379
- Publication type
Article
- DOI
10.1111/j.1945-5100.2011.01264.x