Amino acid analyses of R and CK chondrites

Burton, Aaron S.; Glavin, Daniel P.; Elsila, Jamie E.; Davidson, J.; Miller, Kelly E.; Andronikov, A. V.; Лауретта, Д. С.; Dworkin, Jason P.

doi:10.1111/maps.12433

Cited by 36 publications

(49 citation statements)

References 54 publications

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“…; Burton et al. ), no studies of the characteristics of the meteorite matrix and the distribution of soluble organic compounds in CK meteorites have been undertaken. Consequently, it is unclear if there are any relationships between organic materials and matrix minerals that could hint at the processes that amines might have undergone during thermal metamorphism.…”

Section: Discussionmentioning

confidence: 99%

“…Burton et al. (, ) reported a predominance of n ‐ω‐amino acids over other structural isomers in CO3 meteorites DOM 08006 and MIL 05013; CV3 meteorites Allende, MIL 05013, LAP 02206, and GRA 06101; and CK4 ALH 85002 and CK5 EET 92002 meteorites. Of the amines detected, the isomeric distribution of only propylamine, butylamine, and pentylamine can be examined to see if linear primary amines are also dominant.…”

Section: Discussionmentioning

confidence: 99%

“…In this report, we focus our attention on the abundance and distribution of amines in CV, CK, and CO meteorites, and evaluate the occurrence of these organic compounds in relation to the petrologic characteristics of their parent bodies and other water‐soluble organics (e.g., Burton et al. , ; Chan et al ).…”

Section: Introductionmentioning

confidence: 99%

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Distribution of aliphatic amines in CO, CV, and CK carbonaceous chondrites and relation to mineralogy and processing history

Aponte

Abreu

Glavin

et al. 2017

Meteorit & Planetary Scien

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The analysis of water‐soluble organic compounds in meteorites provides valuable insights into the prebiotic synthesis of organic matter and the processes that occurred during the formation of the solar system. We investigated the concentration of aliphatic monoamines present in hot acid water extracts of the unaltered Antarctic carbonaceous chondrites, Dominion Range (DOM) 08006 (CO3) and Miller Range (MIL) 05013 (CO3), and the thermally altered meteorites, Allende (CV3), LAP 02206 (CV3), GRA 06101 (CV3), Allan Hills (ALH) 85002 (CK4), and EET 92002 (CK5). We have also reviewed and assessed the petrologic characteristics of the meteorites studied here to evaluate the effects of asteroidal processing on the abundance and molecular distributions of monoamines. The CO3, CV3, CK4, and CK5 meteorites studied here contain total concentrations of amines ranging from 1.2 to 4.0 nmol g−1 of meteorite; these amounts are 1–3 orders of magnitude below those observed in carbonaceous chondrites from the CI, CM, and CR groups. The low‐amine abundances for CV and CK chondrites may be related to their extensive degree of thermal metamorphism and/or to their low original amine content. Although the CO3 meteorites, DOM 08006 and MIL 05013, do not show signs of thermal and aqueous alteration, their monoamine contents are comparable to those observed in moderately/extensively thermally altered CV3, CK4, and CK5 carbonaceous chondrites. The low content of monoamines in pristine CO carbonaceous chondrites suggests that the initial amounts, and not asteroidal processes, play a dominant role in the content of monoamines in carbonaceous chondrites. The primary monoamines, methylamine, ethylamine, and n‐propylamine constitute the most abundant amines in the CO3, CV3, CK4, and CK5 meteorites studied here. Contrary to the predominance of n‐ω‐amino acid isomers in CO3 and thermally altered meteorites, there appears to be no preference for the larger n‐amines.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Distribution of aliphatic amines in CO, CV, and CK carbonaceous chondrites and relation to mineralogy and processing history

Aponte

Abreu

Glavin

et al. 2017

Meteorit & Planetary Scien

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“…The propensity for n ‐ω amino acids has been observed in thermally altered meteorites, including CO, CV, CK, the CM Sutter's Mill, and in thermally altered CIs (Burton et al. , , , ), though in those cases the n ‐ω amino acids were primarily in the “free” form. The ratio of five‐carbon amino acids based on amine position (α‐, β‐, γ‐, and δ‐) has been shown to correlate with mineralogy and parent body alteration (e.g., Elsila et al.…”

Section: Discussionmentioning

confidence: 99%

“…All amino acid data (except for Diepenveen) taken from Burton et al. (, , , , ) and Glavin et al. (, ).…”

Section: Discussionmentioning

confidence: 99%

The CM carbonaceous chondrite regolith Diepenveen

Langbroek

Jenniskens

Kriegsman

et al. 2019

Meteorit & Planetary Scien

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A carbonaceous chondrite was recovered immediately after the fall near the village of Diepenveen in the Netherlands on October 27, 1873, but came to light only in 2012. Analysis of sodium and poly‐aromatic hydrocarbon content suggests little contamination from handling. Diepenveen is a regolith breccia with an overall petrology consistent with a CM classification. Unlike most other CM chondrites, the bulk oxygen isotopes are extremely 16O rich, apparently dominated by the signature of anhydrous minerals, distributed on a steep slope pointing to the domain of intrinsic CM water. A small subset plots closer to the normal CM regime, on a parallel line 2 ‰ lower in δ17O. Different lithologies in Diepenveen experienced varying levels of aqueous alteration processing, being less aqueously altered at places rather than more heated. The presence of an agglutinate grain and the properties of methanol‐soluble organic compounds point to active impact processing of some of the clasts. Diepenveen belongs to a CM clan with ~5 Ma CRE age, longer than most other CM chondrites, and has a relatively young K‐Ar resetting age of ~1.5 Ga. As a CM chondrite, Diepenveen may be representative of samples soon to be returned from the surface of asteroid (162173) Ryugu by the Hayabusa2 spacecraft.

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Extra‐Terrestrial Gas‐Phase Stereoinversion in Amino Acid Leucine: Thermal and Photochemical Channels

Rani

Vikas

2020

ChemPhysChem

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Enantiomeric‐excess of the left‐handed enantiomer of proteinogenic amino acids has been reported in the meteoritic samples of carbonaceous chondrites. Such chiral‐bias is recently being believed due to the removal of right‐handed enantiomer through its selective destruction by circularly polarized ultraviolet (UV) radiations in interstellar space. The present work through quantum mechanical computations explores various thermal and photochemical channels for stereoinversion in proteinogenic amino acid Leucine, under the gas‐phase conditions akin to different temperature zones of interstellar medium (ISM). A thermochemical and kinetic analysis for the feasibility of the proposed channels is also carried out in different regions of ISM. The initiation of stereoinversion along all the ground‐state thermal channels is found to be restricted by a very high energy barrier which, however, is proposed to be substantially reduced if the initial step proceeds via an excited‐state. This work reveals that the stereoinversion in Leucine is quite feasible in ISM, provided it is initiated photochemically by UV radiations, which are abundant in ISM.

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Amino acid analyses of R and CK chondrites

Cited by 36 publications

References 54 publications

Distribution of aliphatic amines in CO, CV, and CK carbonaceous chondrites and relation to mineralogy and processing history

Distribution of aliphatic amines in CO, CV, and CK carbonaceous chondrites and relation to mineralogy and processing history

The CM carbonaceous chondrite regolith Diepenveen

Extra‐Terrestrial Gas‐Phase Stereoinversion in Amino Acid Leucine: Thermal and Photochemical Channels

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