Thermal metamorphism of the Mócs meteorite (L6) revealed by optical microscopy and BSE imaging

Gyollai, I.; Fintor, Krisztián; Nagy, Szabolcs; Gucsik, A.

doi:10.1556/24.58.2015.4.3

Cited by 1 publication

(2 citation statements)

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“…Table is from [14] and data were compiled from [307,[312][313][314]. Thermal alteration characterized by increases in temperature can affect the mineralogical composition of chondrites through metamorphic reactions and localized recrystallization but not widespread melting (e.g., [315][316][317][318][319]). CK chondrites are a unique group of carbonaceous chondrites and are the only group that has experienced the full range of thermal alteration types [210,320].…”

Section: Compositional Alteration On Other Planetary Bodiesmentioning

confidence: 99%

“…%, resp aluminum inclusions + amoeboid olivine aggregates. * Highly variab ratio refractory lithophiles relative to Mg and normalized to CI chon Thermal alteration characterized by increases in temper alogical composition of chondrites through metamorphic rea tallization but not widespread melting (e.g., [315][316][317][318][319]). CK ch of carbonaceous chondrites and are the only group that has ex thermal alteration types [210,320].…”

Section: Compositional Alteration On Other Planetary Bmentioning

confidence: 99%

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Chirality in Organic and Mineral Systems: A Review of Reactivity and Alteration Processes Relevant to Prebiotic Chemistry and Life Detection Missions

et al. 2022

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Chirality is a central feature in the evolution of biological systems, but the reason for biology’s strong preference for specific chiralities of amino acids, sugars, and other molecules remains a controversial and unanswered question in origins of life research. Biological polymers tend toward homochiral systems, which favor the incorporation of a single enantiomer (molecules with a specific chiral configuration) over the other. There have been numerous investigations into the processes that preferentially enrich one enantiomer to understand the evolution of an early, racemic, prebiotic organic world. Chirality can also be a property of minerals; their interaction with chiral organics is important for assessing how post-depositional alteration processes could affect the stereochemical configuration of simple and complex organic molecules. In this paper, we review the properties of organic compounds and minerals as well as the physical, chemical, and geological processes that affect organic and mineral chirality during the preservation and detection of organic compounds. We provide perspectives and discussions on the reactions and analytical techniques that can be performed in the laboratory, and comment on the state of knowledge of flight-capable technologies in current and future planetary missions, with a focus on organics analysis and life detection.

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