A temporal shift of chondrule generation from the inner to outer Solar System inferred from oxygen isotopes and Al-Mg chronology of chondrules from primitive CM and CO chondrites

Fukuda, Kohei; Tenner, T. J.; Kimura, Makoto; Tomioka, Naotaka; Siron, Guillaume; Ushikubo, T.; Chaumard, N.; Hertwig, A. T.; Kita, N. T.

doi:10.1016/j.gca.2021.12.027

Cited by 37 publications

(28 citation statements)

References 200 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, this possible heterogeneity has been questioned by other studies (Kita et al., 2013; Wasserburg et al., 2012, see also Fukuda et al. [2022] for a detailed discussion). The robustness of the 26 Al‐ 26 Mg system in D'Orbigny has also been questioned because of the complex petrologic history of this angrite based on its apparent disturbed Sm‐Nd systematics (Sanborn et al., 2015, 2019).…”

Section: Discussionmentioning

confidence: 97%

“…Previous studies have explained the discrepancy between 26 Al- 26 Mg ages when anchored to angrites and CAIs by suggesting a lower initial 26 Al/ 27 Al of the angrite parent body precursor material at the time of CAI formation (e.g., Larsen et al, 2011;Schiller et al, 2015). However, this possible heterogeneity has been questioned by other studies (Kita et al, 2013;Wasserburg et al, 2012, see also Fukuda et al [2022] for a detailed discussion). The robustness of the 26 Al- 26 Mg system in D'Orbigny has also been questioned because of the complex petrologic history of this angrite based on its apparent disturbed Sm-Nd systematics (Sanborn et al, 2015(Sanborn et al, , 2019.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

⁵³Mn‐⁵³Cr chronology and ε⁵⁴Cr‐Δ¹⁷O genealogy of Erg Chech 002: The oldest andesite in the solar system

Anand

Mezger

2022

Meteorit & Planetary Scien

View full text Add to dashboard Cite

The meteorite Erg Chech (EC) 002 is the oldest felsic igneous rock from the solar system analyzed to date and provides a unique opportunity to study the formation of felsic crusts on differentiated protoplanets immediately after metal–silicate equilibration or core formation. The extinct 53Mn‐53Cr chronometer provides chronological constraints on the formation of EC 002 by applying the isochron approach using chromite, metal–silicate–sulfide, and whole‐rock fractions as well as “leachates” obtained by sequential digestion of a bulk sample. Assuming a chondritic evolution of its parent body, a 53Cr/52Cr model age is also obtained from the chromite fraction. The 53Mn‐53Cr isochron age of 1.73 ± 0.96 Ma (anchored to D'Orbigny angrite) and the chromite model age constrained between 1.46−0.68+0.78 and 2.18−1.06+1.32 Ma after the formation of calcium‐aluminium‐rich inclusions (CAIs) agree with the 26Al‐26Mg ages (anchored to CAIs) reported in previous studies. This indicates rapid cooling of EC 002 that allowed near‐contemporaneous closure of multiple isotope systems. Additionally, excess in the neutron‐rich 54Cr (nucleosynthetic anomalies) combined with mass‐independent isotope variations of 17O provides genealogical constraints on the accretion region of the EC 002 parent body. The 54Cr and 17O isotope compositions of EC 002 confirm its origin in the “noncarbonaceous” reservoir and overlap with the vestoid material Northwest Africa 12217 and anomalous eucrite Elephant Moraine 92023. This indicates a common feeding zone during accretion in the protoplanetary disk between the source of EC 002 and vestoids. The enigmatic origin of iron meteorites remains still unresolved as EC 002, which is more like a differentiated crust, has an isotope composition that does not match known iron meteorite groups that were once planetesimal cores.

show abstract

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

⁵³Mn‐⁵³Cr chronology and ε⁵⁴Cr‐Δ¹⁷O genealogy of Erg Chech 002: The oldest andesite in the solar system

Anand

Mezger

2022

Meteorit & Planetary Scien

View full text Add to dashboard Cite

show abstract

“…Instead, small chondrules (and chondrule-like objects) and their fragments may have been transported from the inner solar nebula and accreted along with CAIs onto the Ryugu original parent body. Since the formation age of the Ryugu original parent body (1.8-2.9 Myr after CAI formation) 23 is as early as those of major types of carbonaceous chondrite chondrules (2.2-2.7 Myr after CAI formation) 3 , chondrules typically observed in chondrites (100 µm -1 mm) 1 should have presented in the inner regions of the solar nebula when forming the Ryugu original parent body. Considering radial transport favoring smaller objects to the formation location of the Ryugu original parent body, fragments of the relatively large chondrules may have been provided and observed as isolated olivine and pyroxene grains in the Ryugu samples.…”

Section: Comparison Of the Two Ryugu Cais And Cais In Chondritesmentioning

confidence: 99%

“…Remote sensing observations by the Hayabusa2 spacecraft suggested that asteroid Ryugu formed by reaccumulation of rubble ejected by impact from a larger asteroid 27 . It was suggested that the Ryugu original parent body formed beyond the H 2 O and CO 2 snow lines in the solar nebula at 1.8-2.9 Myr after CAI formation 23 , which is as early as formation of major types of carbonaceous chondrite chondrules at 2.2-2.7 Myr after CAI formation 3 . In the present study, chondrule-like objects and CAIs are observed in the Ryugu samples, which are smaller than 30 µm (Fig.…”

Section: Introductionmentioning

confidence: 99%

Chondrule-like objects and CAIs in asteroid Ryugu: earlier generations of chondrules

Nakashima

Nakamura

Zhang

et al. 2022

Preprint

View full text Add to dashboard Cite

Chondrule-like objects and Ca-Al-rich inclusions (CAIs) are discovered in the retuned samples from asteroid Ryugu. Three chondrule-like objects, which are 16O-rich and -poor with D17O (= d17O – 0.52 × d18O) values of ~ − 23‰ and ~ − 3‰, are dominated by Mg-rich olivine, resembling what proposed as earlier generations of chondrules. The 16O-rich objects are likely to be melted amoeboid olivine aggregates that escaped from incorporation into 16O-poor chondrule precursor dust. Two CAIs composed of spinel, hibonite, and perovskite are 16O-rich with D17O of ~ − 23‰ and possibly as old as the oldest CAIs. The chondrule-like objects and CAIs (< 30 µm) are as small as those from comets, suggesting radial transport favoring smaller objects from the inner solar nebula to the formation location of the Ryugu original parent body, which is farther from the Sun and scarce in chondrules. The transported objects may have been mostly destroyed during aqueous alteration.

show abstract

“…However, interpretation of the disagreement between 26 Al-26 Mg and Pb-isotopic dates as evidence for initial 26 Al/ 27 Al heterogeneity has been disputed. The age data for CAIs and chondrules were called into question [30][31][32] . Among the suggested possible causes of age inaccuracy are biases in Pb-isotopic ages derived from multi-step partial dissolution that was used in chondrule dating 28 , age variability in CAIs 19,33,34 , and variability of 26 Al/ 27 Al ratios in CAIs 35 .…”

Section: Introductionmentioning

confidence: 99%

U-Pb age of the oldest achondrite points to 26Al heterogeneity in the early Solar System

Krestianinov

Amelin²,

Yin

et al. 2022

Preprint

View full text Add to dashboard Cite

The homogeneity of distribution of radioisotope 26Al in the early solar nebula, a major heat source for early planetary differentiation and foundational assumption to high resolution cosmochronology, remains debatable. Here we report a precise Pb-isotopic age of 4565.56±0.12 million years (Ma) for the recently discovered andesitic achondrite Erg Chech 002. Combining this age with published high-precision 26Al-26Mg data, we demonstrate that the initial 26Al/27Al in the source material of this achondrite was distinctly higher than in several well preserved and precisely dated achondrites. We argue that the current data clearly indicate spatial heterogeneity of 26Al in the precursor molecular cloud or the protoplanetary disk of the Solar System, likely associated with the late infall of stellar materials with freshly synthesized radionuclides.

show abstract

A temporal shift of chondrule generation from the inner to outer Solar System inferred from oxygen isotopes and Al-Mg chronology of chondrules from primitive CM and CO chondrites

Cited by 37 publications

References 200 publications

⁵³Mn‐⁵³Cr chronology and ε⁵⁴Cr‐Δ¹⁷O genealogy of Erg Chech 002: The oldest andesite in the solar system

⁵³Mn‐⁵³Cr chronology and ε⁵⁴Cr‐Δ¹⁷O genealogy of Erg Chech 002: The oldest andesite in the solar system

Chondrule-like objects and CAIs in asteroid Ryugu: earlier generations of chondrules

U-Pb age of the oldest achondrite points to 26Al heterogeneity in the early Solar System

Contact Info

Product

Resources

About

A temporal shift of chondrule generation from the inner to outer Solar System inferred from oxygen isotopes and Al-Mg chronology of chondrules from primitive CM and CO chondrites

Cited by 37 publications

References 200 publications

53Mn‐53Cr chronology and ε54Cr‐Δ17O genealogy of Erg Chech 002: The oldest andesite in the solar system

53Mn‐53Cr chronology and ε54Cr‐Δ17O genealogy of Erg Chech 002: The oldest andesite in the solar system

Chondrule-like objects and CAIs in asteroid Ryugu: earlier generations of chondrules

U-Pb age of the oldest achondrite points to 26Al heterogeneity in the early Solar System

Contact Info

Product

Resources

About

⁵³Mn‐⁵³Cr chronology and ε⁵⁴Cr‐Δ¹⁷O genealogy of Erg Chech 002: The oldest andesite in the solar system

⁵³Mn‐⁵³Cr chronology and ε⁵⁴Cr‐Δ¹⁷O genealogy of Erg Chech 002: The oldest andesite in the solar system