Frank Ti - Academia.edu (original) (raw)
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Papers by Frank Ti
Physics of The Earth and Planetary Interiors, 2009
Energy dispersive spectroscopy (EDS) Marine sediments Scanning electron microscopy (SEM) Low-temp... more Energy dispersive spectroscopy (EDS) Marine sediments Scanning electron microscopy (SEM) Low-temperature magnetism Early diagenesis a b s t r a c t Low-temperature (LT) magnetic remanence and hysteresis measurements, in the range 300-5 K, were combined with energy dispersive spectroscopy (EDS) in order to characterize the magnetic inventory of strongly diagenetically altered sediments originating from the Niger deep-sea fan. We demonstrate the possibility of distinguishing between different compositions of members of the magnetite-ulvöspinel and ilmenite-hematite solid solution series on a set of five representative samples, two from the upper suboxic and three from the lower sulfidic anoxic zone of gravity core GeoB 4901. Highly sensitive LT magnetic measurements were performed on magnetic extracts resulting in large differences in the magnetic behavior between samples from the different layers. This emphasizes that both Fe-Ti oxide phases occur in different proportions in the two geochemical environments.
Physics of The Earth and Planetary Interiors, 2009
Energy dispersive spectroscopy (EDS) Marine sediments Scanning electron microscopy (SEM) Low-temp... more Energy dispersive spectroscopy (EDS) Marine sediments Scanning electron microscopy (SEM) Low-temperature magnetism Early diagenesis a b s t r a c t Low-temperature (LT) magnetic remanence and hysteresis measurements, in the range 300-5 K, were combined with energy dispersive spectroscopy (EDS) in order to characterize the magnetic inventory of strongly diagenetically altered sediments originating from the Niger deep-sea fan. We demonstrate the possibility of distinguishing between different compositions of members of the magnetite-ulvöspinel and ilmenite-hematite solid solution series on a set of five representative samples, two from the upper suboxic and three from the lower sulfidic anoxic zone of gravity core GeoB 4901. Highly sensitive LT magnetic measurements were performed on magnetic extracts resulting in large differences in the magnetic behavior between samples from the different layers. This emphasizes that both Fe-Ti oxide phases occur in different proportions in the two geochemical environments.