In:
Science, American Association for the Advancement of Science (AAAS), Vol. 325, No. 5943 ( 2009-08-21), p. 985-988
Abstract:
The timing of the formation of the first solids in the solar system remains poorly constrained. Micrometer-scale, high-precision magnesium (Mg) isotopic analyses demonstrate that Earth, refractory inclusions, and chondrules from primitive meteorites formed from a reservoir in which short-lived aluminum-26 ( 26 Al) and Mg isotopes were homogeneously distributed at ±10%. This level of homogeneity validates the use of 26 Al as a precise chronometer for early solar system events. High-precision chondrule 26 Al isochrons show that several distinct chondrule melting events took place from ~1.2 million years (My) to ~4 My after the first solids condensed from the solar nebula, with peaks between ~1.5 and ~3 My, and that chondrule precursors formed as early as 0 .87 -0 .16 +0 .19 My after.
Type of Medium:
Online Resource
ISSN:
0036-8075
,
1095-9203
DOI:
10.1126/science.1173907
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2009
detail.hit.zdb_id:
128410-1
detail.hit.zdb_id:
2066996-3
detail.hit.zdb_id:
2060783-0
SSG:
11
Permalink