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|a 10.1029/2021GL094143
|2 doi
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|a eng
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|a Melwani Daswani, Mohit
|e verfasserin
|4 aut
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| 245 |
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|a A Metamorphic Origin for Europa's Ocean
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|c 2021
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 31.07.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2021 Jet Propulsion Laboratory. California Institute of Technology. Government sponsorship acknowledged.
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|a Europa likely contains an iron-rich metal core. For it to have formed, temperatures within Europa reached ≳ 1250 K. Going up to that temperature, accreted chondritic minerals - for example, carbonates and phyllosilicates - would partially devolatilize. Here, we compute the amounts and compositions of exsolved volatiles. We find that volatiles released from the interior would have carried solutes, redox-sensitive species, and could have generated a carbonic ocean in excess of Europa's present-day hydrosphere, and potentially an early CO 2 atmosphere. No late delivery of cometary water was necessary. Contrasting with prior work, CO 2 could be the most abundant solute in the ocean, followed by Ca 2 + , SO 4 2 - , and HCO 3 - . However, gypsum precipitation going from the seafloor to the ice shell decreases the dissolved S/Cl ratio, such that Cl > S at the shallowest depths, consistent with recently inferred endogenous chlorides at Europa's surface. Gypsum would form a 3-10 km thick sedimentary layer at the seafloor
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|a Journal Article
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|a Europa
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| 650 |
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|a metamorphism
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| 650 |
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4 |
|a ocean worlds
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| 650 |
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4 |
|a planetary mineralogy and petrology
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| 650 |
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|a thermodynamic modeling
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| 650 |
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4 |
|a water‐rock interaction
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| 700 |
1 |
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|a Vance, Steven D
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mayne, Matthew J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Glein, Christopher R
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Geophysical research letters
|d 1984
|g 48(2021), 18 vom: 28. Sept., Seite e2021GL094143
|w (DE-627)NLM098182501
|x 0094-8276
|7 nnns
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| 773 |
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|g volume:48
|g year:2021
|g number:18
|g day:28
|g month:09
|g pages:e2021GL094143
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|u http://dx.doi.org/10.1029/2021GL094143
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