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http://hdl.handle.net/20.500.12386/30609
Titolo: | Conditions for the Long-Term Preservation of a Deep Brine Reservoir in Ceres | Autori: | Castillo-Rogez, Julie C. Hesse, M. A. FORMISANO, Michelangelo Sizemore, H. Bland, M. Ermakov, A. I. Fu, R. R. |
Data pubblicazione: | 2019 | Rivista: | GEOPHYSICAL RESEARCH LETTERS | Numero: | 46 | Fascicolo: | 4 | Da pagina:: | 1963 | Abstract: | We propose a new internal evolution model for the dwarf planet Ceres matching the constraints on Ceres' present internal state from the Dawn mission observations. We assume an interior differentiated into a volatile-dominated crust and rocky mantle, and with remnant brines in the mantle, all consistent with inferences from the Dawn geophysical observations. Simulations indicate Ceres should preserve a warm crust until present if the crust is rich in clathrate hydrates. The temperature computed at the base of the crust exceeds 220 K for a broad range of conditions, allowing for the preservation of a small amount of brines at the base of the crust. However, a temperature ≥250 K, for which at least 1 wt.% sodium carbonate gets in solution requires a crustal abundance of clathrate hydrates greater than 55 vol.%, a situation possible for a narrow set of evolutionary scenarios. | URI: | http://hdl.handle.net/20.500.12386/30609 | URL: | https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GL081473 | ISSN: | 0094-8276 | DOI: | 10.1029/2018GL081473 | Bibcode ADS: | 2019GeoRL..46.1963C | Fulltext: | open |
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