O magmatismo de Io - Júpiter: sua caracterização através da magnetometria

Abstract

The first satellite of the planet Jupiter, named Io (named after one of the lovers of the god Jupiter in the roman mythology), draws attention by the magnitude of its volcanic activity. The lavas generated in Io reach temperatures higher than 1600 oC, with eruptions reaching a few hundred meters high. This activity comes from “tidal heating”, an unverified process on Earth. This process is caused by the gravitational attraction of Jupiter, Europa and Ganymedes, the latter two being the satellites following Io. Using geophysical data from the Galileo space mission, launched on October 18, 1989, which carriedoutJupitersystemprobingflightsbetween1995and2003,andEarthobservations by radio telescopes to obtain the temperature of Io’s magmatism, this work aims classify the type of volcanism that occurs in Io using magnetometric data. With the use of the magnetic field induced by the rocks of Io, the magnetic susceptibility levels for the rocks of the satellite crust were obtained. With this parameter, the rocks from Io’s crust can be classified as gabbros and komatiites, rocks that require a high grade of partial melt, what was already expected from the satellite.