scholarly journals ASTRONOMICAL OXYGEN ISOTOPIC EVIDENCE FOR SUPERNOVA ENRICHMENT OF THE SOLAR SYSTEM BIRTH ENVIRONMENT BY PROPAGATING STAR FORMATION

2011 ◽  
Vol 729 (1) ◽  
pp. 43 ◽  
Author(s):  
Edward D. Young ◽  
Matthieu Gounelle ◽  
Rachel L. Smith ◽  
Mark R. Morris ◽  
Klaus M. Pontoppidan
Keyword(s):  
Star Formation ◽  
Solar System ◽  
Isotopic Evidence ◽  
Oxygen Isotopic ◽  
Birth Environment

Spectroscopic and oxygen isotopic evidence for low and high temperature origin of talc

1986 ◽  
Vol 109 (3) ◽  
pp. 253-263 ◽  
Author(s):  
Yves Noack ◽  
Alain Decarreau ◽  
Alain Manceau
Keyword(s):  
High Temperature ◽  
Isotopic Evidence ◽  
Oxygen Isotopic

scholarly journals Oxygen isotopic heterogeneity in the early Solar System inherited from the protosolar molecular cloud

2020 ◽  
Vol 6 (42) ◽  
pp. eaay2724
Author(s):  
Alexander N. Krot ◽  
Kazuhide Nagashima ◽  
James R. Lyons ◽  
Jeong-Eun Lee ◽  
Martin Bizzarro
Keyword(s):  
Solar System ◽  
Molecular Cloud ◽  
Limited Range ◽  
Terrestrial Planets ◽  
Carbonaceous Chondrites ◽  
The Sun ◽  
Early Solar System ◽  
Isotopic Heterogeneity ◽  
Oxygen Isotopic ◽  
O 24

The Sun is 16O-enriched (Δ17O = −28.4 ± 3.6‰) relative to the terrestrial planets, asteroids, and chondrules (−7‰ < Δ17O < 3‰). Ca,Al-rich inclusions (CAIs), the oldest Solar System solids, approach the Sun’s Δ17O. Ultraviolet CO self-shielding resulting in formation of 16O-rich CO and 17,18O-enriched water is the currently favored mechanism invoked to explain the observed range of Δ17O. However, the location of CO self-shielding (molecular cloud or protoplanetary disk) remains unknown. Here we show that CAIs with predominantly low (26Al/27Al)0, <5 × 10−6, exhibit a large inter-CAI range of Δ17O, from −40‰ to −5‰. In contrast, CAIs with the canonical (26Al/27Al)0 of ~5 × 10−5 from unmetamorphosed carbonaceous chondrites have a limited range of Δ17O, −24 ± 2‰. Because CAIs with low (26Al/27Al)0 are thought to have predated the canonical CAIs and formed within first 10,000–20,000 years of the Solar System evolution, these observations suggest oxygen isotopic heterogeneity in the early solar system was inherited from the protosolar molecular cloud.

scholarly journals Chromium Isotopic Evidence for Mixing of NC and CC Reservoirs in Polymict Ureilites: Implications for Dynamical Models of the Early Solar System

2021 ◽  
Vol 2 (1) ◽  
pp. 13
Author(s):  
Cyrena A. Goodrich ◽  
Matthew E. Sanborn ◽  
Qing-Zhu Yin ◽  
Issaku Kohl ◽  
David Frank ◽  
...  
Keyword(s):  
Solar System ◽  
Early Solar System ◽  
Dynamical Models ◽  
Isotopic Evidence

Molybdenum isotopic evidence for the late accretion of outer Solar System material to Earth

2019 ◽  
Vol 3 (8) ◽  
pp. 736-741 ◽  
Author(s):  
Gerrit Budde ◽  
Christoph Burkhardt ◽  
Thorsten Kleine
Keyword(s):  
Solar System ◽  
Outer Solar System ◽  
Isotopic Evidence

Isotopic variations in primitive meteorites

1981 ◽  
Vol 303 (1477) ◽  
pp. 339-349 ◽  
Keyword(s):  
Solar System ◽  
Time Scale ◽  
Decay Product ◽  
Common Source ◽  
Time Interval ◽  
Crystal Formation ◽  
Ordinary Chondrites ◽  
Gas Reservoir ◽  
Oxygen Isotopic ◽  
Isotopic Variations

Oxygen isotopic variations in carbonaceous chondrites and in ordinary chondrites can each be interpreted as mixtures of two isotopically different reservoirs, one consisting of solids, enriched in 16 O , the other of a gas, depleted in 16 O relative to terrestrial abundances. The data suggest a common source of the solids for each of the two classes of meteorites, but a different gas reservoir for each. These conditions might prevail in gaseous protoplanets. Radiogenic 26 Mg is variable in abundance among some classes of Allende inclusions, implying either nebular heterogeneity with respect to 26 A1/ 27 Al ratios, or time differences of crystal formation of 1 or 2 x 10 6 a. The presence of excess 107 Ag from decay of extinct 107 Pd supports the evidence from 26 Mg for a time interval of at most a few million years between the last nucleosynthetic event and accretion of substantial bodies in the Solar System. The widespread small excess of 50 Ti in Allende inclusions is tantalizing, but unexplained. An exceptional hibonite-rich inclusion from Allende contains strongly fractionated isotopes of oxygen and calcium, but isotopically normal magnesium. Its trace elements imply association with a hot, oxidized gas. Among the volatile elements, neon-E has been shown to be essentially pure 22 Ne, and appears to be the decay product of extinct 22 Na. If so, condensation of some stellar ejecta must take place on a time scale of a year or so. The problem of reconciling the 26 A1 time scale of about 10 6 years between nucleosynthesis and Solar System condensation with the 10 8 year scale implied by the decay of 129 I to 129 Xe and fission of 244 Pu requires that at most a small fraction of the 129 I and 244 Pu be formed in the most recent event. Progress has been made in establishing the carrier phases of isotopically anomalous xenon and krypton. The apparent location of anomalous xenon and 14 N-rich nitrogen in identical carriers supports the notion that nucleosynthetic anomalies in nitrogen are also present in Allende.

scholarly journals Oxygen Isotopic Heterogeneity in the Solar System Inherited from the Protosolar Molecular Cloud

2020 ◽  
Author(s):  
Alexander N. Krot ◽  
Kazuhide Nagashima ◽  
James Lyons ◽  
Jeong-Eun Lee ◽  
Martin Bizzarro
Keyword(s):  
Solar System ◽  
Molecular Cloud ◽  
Isotopic Heterogeneity ◽  
Oxygen Isotopic
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