Mathematics – Logic
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmgp23a0167k&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #GP23A-0167
Mathematics
Logic
1500 Geomagnetism And Paleomagnetism, 1519 Magnetic Mineralogy And Petrology, 1540 Rock And Mineral Magnetism
Scientific paper
Oxidized basaltic lava flows are common in terrestrial environment and magnetic mineralogy ranges from rhombohedral to spinel phases contributing to a complex overall magnetic behavior. Similar rock types are responsable for very intense magnetic anomalies on Earth and may be an equivalent to those on Mars. Therefore this research may identify the magnetic techniques that should be employed as part of instrumentation on board of remote control rover on surface of Mars. We obtained a large number of magnetic and mineralogic tests on a basaltic profile across a tree mold from Kilauea volcano, Hawaii, where the oxygen fugacity was presumably modified by the presence of combustible organic material within the lava flow. The lava flow cools down rapidly as it approaches much cooler organic material. This process results in contrasting contents of titanium in magnetic phases and different Fe-Ti oxide textures, which is important for the overall rock magnetic properties. We attempted to identify the contribution of all the magnetic phases within these rocks using different remanence and susceptibility measurement at very low-, low- and high-temperature as well as optical and electron microscope investigations. The phases within these rocks are titanohematite (self reversing composition), ferrian ilmenite and titanomagnetite, which contribute to the induced as well as to the remanent component of the magnetization.
Kletetschka Gunther
Kontny Agnes
Wasilewski Peter J.
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