New estimates for Io eruption temperatures: Implications for the interior
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Abstract
The initial interpretation of Galileo data from Jupiter's moon, Io, suggested eruption temperatures ≥1600°C. Tidal heating models have difficulties explaining Io's prodigious heat flow if the mantle is >1300°C, although we suggest that temperatures up to ~1450°C may be possible. In general, Io eruption temperatures have been overestimated because the incorrect thermal model has been applied. Much of the thermal emission from high-temperature hot spots comes from lava fountains but lava flow models were utilized. We apply a new lava fountain model to the highest reported eruption temperature, the SSI observation of the 1997 eruption at Pillan. This resets the lower temperature limit for the eruption from ~1600 to ~1340°C . Additionally, viscous heating of the magma may have increased eruption temperature by ~50-100°C as a result of the strong compressive stresses in the ionian lithosphere. While further work is needed, it appears that the discrepancy between observations and interior models is largely resolved.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | New estimates for Io eruption temperatures: Implications for the interior |
| Series title | Icarus |
| DOI | 10.1016/j.icarus.2007.07.008 |
| Volume | 192 |
| Issue | 2 |
| Year Published | 2007 |
| Language | English |
| Publisher | Elsevier Science B.V. |
| Contributing office(s) | Astrogeology Science Center |
| Description | 12 p. |
| First page | 491 |
| Last page | 502 |
| Other Geospatial | Io |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |