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Analysis of pathways for volatile-bearing mineral formation in carbonaceous chondrites using thermodynamic simulations

Identification

Public canonical key

doi:10.25911/fqg9-q561

Authors

Baile, Riley

Reported year

2026

Reported language

und · en_AU

Source type

Thesis (MPhil)

First detected

2026-11-09T19:07:42.931264+00:00

Last metadata observation

2026-11-09T19:07:42.931264+00:00

Last HTTP verification

Not checked

Documentary abstract — original language

Low temperature minerals in carbonaceous chondrites record volatile processes in the solar system. These processes could occur via liquid-solid or gas-solid reactions; however, few studies have considered gases. A Gibbs free energy minimization approach was used to investigate the formation of the Tagish Lake meteorite's low temperature matrix including gases and liquid water, with starting compositions of low O and high O determined from its bulk composition. The high O model predicts phyllosilicate formation at <500 Degrees C, accounting for up to 24 mol% of solids and showing a similar compositional trend to observations of Tagish Lake's carbonate-rich lithology. Carbonates reached a maximum abundance of 50 mol% of solids at the lowest simulated temperature (0 Degrees C), being the most abundant group of minerals, excluding water. The low O model also formed phyllosilicates at <500 Degrees C, reaching up to ~18 mol% of solids, however carbonates were negligible. The low O phyllosilicate compositions more closely mirror the Tagish Lake's carbonate-poor lithology. The low O composition also predicts the coexistence olivine and abundant phyllosilicate for temperatures <150 Degrees C. These models indicate the importance of O in carbonaceous chondrite alteration and confirm that high and low temperature minerals could coexist in carbonaceous chondrites in a system open to gas within the parent body. Also, this model provides a method of quantifying volatile loss due to heating on an asteroid.

Identifiers

DOI

10.25911/fqg9-q561

HANDLE

1885/733808735

OAI

oai:openresearch-repository.anu.edu.au:1885/733808735

Documentary context

Documentary family

Thesis

Source-reported types

Thesis (MPhil)

Natural entities mentioned

Lake

Entity mentions are not evidence of legal recognition. Jurisdiction studied is separate from author affiliation country.

Sources

Repository · Record 1 · Record 2

• DOI · https://doi.org/10.25911/fqg9-q561
• Document · https://hdl.handle.net/1885/733808735

Documentary status

Relevance pending

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