A Return to Io: Science Goals and Implementation

Details A Return to Io: Science Goals and Implementation A Return to Io: Science Goals and Implementation

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaop.work...78s&link_type=abstract

Forum on Innovative Approaches to Outer Planetary Exploration 2001-2020, p. 78

Mathematics

Logic

Io, Volcanology, Geology, Analogs, Space Exploration, Heat Transmission, Biological Evolution, Volcanoes, Spacecraft Instruments

Scientific paper

Io remains one of the most fascinating objects in the solar system: the only place beyond Earth where we can watch hard-rock geology in action. In its high heat flow Io resembles the early Earth, providing a present-day analog to some of the processes that dominated the Earth's geology at the time that life first appeared. Io's usefulness as an early-Earth analog has been underscored recently by the detection of very high eruption temperatures, hotter than terrestrial basaltic lavas. These temperatures are most plausibly interpreted as resulting from ultramafic lava compositions, analagous to the komatiites that were common on Earth in the Precambrian but which have been virtually absent during the Phanerozoic. The large scale of many Io eruptions also provides useful analogs to Phanerozoic terrestrial eruptions, such as flood basalts, which are important for the Earth's geological and biological evolution but which occur too rarely to be witnessed by humans on our own planet. By providing living examples, Io can thus play the same role in understanding large-scale planetary volcanism that volcanically active terrestrial regions have played in understanding the results of smaller-scale volcanic processes seen in the geological record worldwide. Additional information is contained in the original extended abstract.

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