The H content of aubrites: An evaluation of bulk versus in situ methods for quantifying water in meteorites

Peterson, Liam D.; Newcombe, Megan E.; Alexander, Conel M.O'D.; Wang, Jianhua; Klein, Frieder; Bekaert, David V.; Nielsen, Sune G.

doi:10.1016/j.epsl.2023.118341

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2024

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Cited by 4 publications

References 67 publications

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Planetary materials: A record of early Solar System events to planetary processes

Bouvier,

Bermingham,

Füri

2024

Reference Module in Earth Systems and Environmental Sciences

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Planetary materials: A record of early Solar System events to planetary processes

Bouvier,

Bermingham,

Füri

2024

Reference Module in Earth Systems and Environmental Sciences

View full text Add to dashboard Cite

The H-poor nature of incompletely melted planetesimals: The view from acapulcoites and lodranites

Peterson,

Newcombe,

Alexander

et al. 2024

Geochimica et Cosmochimica Acta

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The formation of volatile‐bearing djerfisherite in reduced meteorites

Wilbur,

McCoy,

Corrigan

et al. 2024

Meteorit & Planetary Scien

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Enstatite meteorites, both aubrites and enstatite chondrites, formed under exceptionally reducing conditions, similar to the planet Mercury. Despite being reduced, the MESSENGER mission showed that the surface of Mercury is more enriched in volatiles (e.g., S, Na, K, Cl) than previously thought. To better understand the mineral hosts of these volatiles and how they formed, this work examines the chemistry and petrographic settings of a rare, K‐bearing sulfide called djerfisherite within enstatite chondrites and aubrites. The petrographic settings of djerfisherite within aubrites suggest this critical host of Cl formed after both the crystallization of troilite and exsolution of daubréelite. Djerfisherite is commonly observed as a rim on other sulfides and in contact with metal. We present an alteration model for djerfisherite formation in aubrite meteorites, whereby troilite and Fe‐Ni metal are altered through anhydrous, alkali‐ and Cl‐rich fluid metasomatism on the aubrite parent body to produce secondary djerfisherite. Moreover, we observe a loss of volatiles in djerfisherite within impact melted regions of the Miller Range 07139 EH3 chondrite and the Bishopville aubrite and explore the potential for impact devolatilization changes to sulfide chemistry on other reduced bodies in the Solar System. Vapor or fluid phase interactions are likely important in the formation of volatile‐rich phases in reduced systems. While most Na and K on the mercurian surface is expected to be hosted in feldspar, djerfisherite is likely a minor, but critical, reservoir for K, Na, and Cl. Djerfisherite present on reduced bodies, such as Mercury, may represent sulfides formed via late‐stage, primary metasomatism.

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The H content of aubrites: An evaluation of bulk versus in situ methods for quantifying water in meteorites

Cited by 4 publications

References 67 publications

Planetary materials: A record of early Solar System events to planetary processes

Planetary materials: A record of early Solar System events to planetary processes

The H-poor nature of incompletely melted planetesimals: The view from acapulcoites and lodranites

The formation of volatile‐bearing djerfisherite in reduced meteorites

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