Episodic formation of refractory inclusions in the Solar System and their presolar heritage

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Episodic formation of refractory inclusions in the Solar System and their presolar heritage. / Larsen, K. K.; Schiller, M.; Krot, A. N.; Bizzarro, M.

In: Earth and Planetary Science Letters, Vol. 535, 116088, 01.04.2020.

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Larsen, KK, Schiller, M, Krot, AN & Bizzarro, M 2020, 'Episodic formation of refractory inclusions in the Solar System and their presolar heritage', Earth and Planetary Science Letters, vol. 535, 116088. https://doi.org/10.1016/j.epsl.2020.116088

APA

Larsen, K. K., Schiller, M., Krot, A. N., & Bizzarro, M. (2020). Episodic formation of refractory inclusions in the Solar System and their presolar heritage. Earth and Planetary Science Letters, 535, [116088]. https://doi.org/10.1016/j.epsl.2020.116088

Vancouver

Larsen KK, Schiller M, Krot AN, Bizzarro M. Episodic formation of refractory inclusions in the Solar System and their presolar heritage. Earth and Planetary Science Letters. 2020 Apr 1;535. 116088. https://doi.org/10.1016/j.epsl.2020.116088

Author

Larsen, K. K. ; Schiller, M. ; Krot, A. N. ; Bizzarro, M. / Episodic formation of refractory inclusions in the Solar System and their presolar heritage. In: Earth and Planetary Science Letters. 2020 ; Vol. 535.

Bibtex

@article{12fc4827138c4518a87ce5a1780951ac,
title = "Episodic formation of refractory inclusions in the Solar System and their presolar heritage",
abstract = "Refractory inclusions [Ca-Al-rich Inclusions (CAIs) and Amoeboid Olivine Aggregates (AOAs)] in primitive meteorites are the oldest Solar System solids. They formed in the hot inner protoplanetary disk and, as such, provide insights into the earliest disk dynamics and physicochemical processing of the dust and gas that accreted to form the Sun and its planetary system. Using the short-lived 26Al to 26Mg decay system, we show that bulk refractory inclusions in CV (Vigarano-type) and CR (Renazzo-type) carbonaceous chondrites captured at least two distinct 26Al-rich (26Al/27Al ratios of ∼5 × 10−5) populations of refractory inclusions characterized by different initial 26Mg/24Mg isotope compositions (μ26Mg*0). Another 26Al-poor CAI records an even larger μ26Mg*0 deficit. This suggests that formation of refractory inclusions was punctuated and recurrent, possibly associated with episodic outbursts from the accreting proto-Sun lasting as short as <8000 yr. Our results support a model in which refractory inclusions formed close to the hot proto-Sun and were subsequently redistributed to the outer disk, beyond the orbit of Jupiter, plausibly via stellar outflows with progressively decreasing transport efficiency. We show that the magnesium isotope signatures in refractory inclusions mirrors the presolar grain record, demonstrating a mutual exclusivity between 26Al enrichments and large nucleosynthetic Mg isotope effects. This suggests that refractory inclusions formed by incomplete thermal processing of presolar dust, thereby inheriting a diluted signature of their isotope systematics. As such, they record snapshots in the progressive sublimation of isotopically anomalous presolar carriers through selective thermal processing of young dust components from the proto-Solar molecular cloud. We infer that 26Al-rich refractory inclusions incorporated 26Al-rich dust which formed <5 Myr prior to our Sun, whereas 26Al-poor inclusions (such as FUN- and PLAC-type CAIs) incorporated >10 Myr old dust.",
keywords = "Al, episodic outburst, Mg isotope, presolar dust, refractory inclusion, Solar System formation",
author = "Larsen, {K. K.} and M. Schiller and Krot, {A. N.} and M. Bizzarro",
year = "2020",
month = "4",
day = "1",
doi = "10.1016/j.epsl.2020.116088",
language = "English",
volume = "535",
journal = "Earth and Planetary Science Letters",
issn = "0012-821X",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Episodic formation of refractory inclusions in the Solar System and their presolar heritage

AU - Larsen, K. K.

AU - Schiller, M.

AU - Krot, A. N.

AU - Bizzarro, M.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - Refractory inclusions [Ca-Al-rich Inclusions (CAIs) and Amoeboid Olivine Aggregates (AOAs)] in primitive meteorites are the oldest Solar System solids. They formed in the hot inner protoplanetary disk and, as such, provide insights into the earliest disk dynamics and physicochemical processing of the dust and gas that accreted to form the Sun and its planetary system. Using the short-lived 26Al to 26Mg decay system, we show that bulk refractory inclusions in CV (Vigarano-type) and CR (Renazzo-type) carbonaceous chondrites captured at least two distinct 26Al-rich (26Al/27Al ratios of ∼5 × 10−5) populations of refractory inclusions characterized by different initial 26Mg/24Mg isotope compositions (μ26Mg*0). Another 26Al-poor CAI records an even larger μ26Mg*0 deficit. This suggests that formation of refractory inclusions was punctuated and recurrent, possibly associated with episodic outbursts from the accreting proto-Sun lasting as short as <8000 yr. Our results support a model in which refractory inclusions formed close to the hot proto-Sun and were subsequently redistributed to the outer disk, beyond the orbit of Jupiter, plausibly via stellar outflows with progressively decreasing transport efficiency. We show that the magnesium isotope signatures in refractory inclusions mirrors the presolar grain record, demonstrating a mutual exclusivity between 26Al enrichments and large nucleosynthetic Mg isotope effects. This suggests that refractory inclusions formed by incomplete thermal processing of presolar dust, thereby inheriting a diluted signature of their isotope systematics. As such, they record snapshots in the progressive sublimation of isotopically anomalous presolar carriers through selective thermal processing of young dust components from the proto-Solar molecular cloud. We infer that 26Al-rich refractory inclusions incorporated 26Al-rich dust which formed <5 Myr prior to our Sun, whereas 26Al-poor inclusions (such as FUN- and PLAC-type CAIs) incorporated >10 Myr old dust.

AB - Refractory inclusions [Ca-Al-rich Inclusions (CAIs) and Amoeboid Olivine Aggregates (AOAs)] in primitive meteorites are the oldest Solar System solids. They formed in the hot inner protoplanetary disk and, as such, provide insights into the earliest disk dynamics and physicochemical processing of the dust and gas that accreted to form the Sun and its planetary system. Using the short-lived 26Al to 26Mg decay system, we show that bulk refractory inclusions in CV (Vigarano-type) and CR (Renazzo-type) carbonaceous chondrites captured at least two distinct 26Al-rich (26Al/27Al ratios of ∼5 × 10−5) populations of refractory inclusions characterized by different initial 26Mg/24Mg isotope compositions (μ26Mg*0). Another 26Al-poor CAI records an even larger μ26Mg*0 deficit. This suggests that formation of refractory inclusions was punctuated and recurrent, possibly associated with episodic outbursts from the accreting proto-Sun lasting as short as <8000 yr. Our results support a model in which refractory inclusions formed close to the hot proto-Sun and were subsequently redistributed to the outer disk, beyond the orbit of Jupiter, plausibly via stellar outflows with progressively decreasing transport efficiency. We show that the magnesium isotope signatures in refractory inclusions mirrors the presolar grain record, demonstrating a mutual exclusivity between 26Al enrichments and large nucleosynthetic Mg isotope effects. This suggests that refractory inclusions formed by incomplete thermal processing of presolar dust, thereby inheriting a diluted signature of their isotope systematics. As such, they record snapshots in the progressive sublimation of isotopically anomalous presolar carriers through selective thermal processing of young dust components from the proto-Solar molecular cloud. We infer that 26Al-rich refractory inclusions incorporated 26Al-rich dust which formed <5 Myr prior to our Sun, whereas 26Al-poor inclusions (such as FUN- and PLAC-type CAIs) incorporated >10 Myr old dust.

KW - Al

KW - episodic outburst

KW - Mg isotope

KW - presolar dust

KW - refractory inclusion

KW - Solar System formation

U2 - 10.1016/j.epsl.2020.116088

DO - 10.1016/j.epsl.2020.116088

M3 - Letter

AN - SCOPUS:85078278566

VL - 535

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

SN - 0012-821X

M1 - 116088

ER -

ID: 240785947