No abstract

We used illite and chlorite crystallinities, index minerals, mineral assemblages, polytype and domain size of white mica, electron microprobe analysis (EMPA), b0 geobarometer and chlorite geothermometer to quantify the diagenetic and metamorphic overprint on the Triassic flysch formations in the Songpan‐Garzê orogen along profile Zoigê‐Lushan, northwest Sichuan. Two anchizones, two epizones, one diagenetic zone and a transition belt in‐between them are defined on the basis of the obtained data. Illite crystallinity correlates strongly with the best mean domain size of mica and moderately with chlorite crystallinity. 2M1 white mica polytype are observed within the epizone whilst 2M1 and 1M polytypes occur in the anchizone and diagenetic zone. Epizonal metamorphism reached maximum temperatures of 370°C±21°C at low‐to intermediate pressure conditions. Clay minerals underwent Ostwald ripening during metamorphism. Rocks from both sides of the Longmenshan fault reveal contrasting degrees of metamorphic overprint: on the northwest side of the Longmenshan fault, epimetamorphic conditions contrast with diagenetic rocks on the southeast side.

RMO 3 (R=rare earth, M=Fe, Mn, Ni) is a kind of multi-ferroelectric material 1 while Lu is a element which has been widely used in electroluminescence area. Material constituted with Fe and Lu is thought to have special properties on electromagnetic coupling due to the reactivity of Lu and the magnetism of Fe. For example, LuFe 2 O 4 is a new type of electric ferroelectric material which has become more and more concerned after Ikeda reported it in the Nature magazine in 2005. 2 We successfully fabricated another LuFeO 3 thin film with sol-gel method on Si substrates with different constituents, and analyzed the structural, optical properties of the samples. We investigated the optical properties with UV-Vis, PL, etc. After Mn was doped, the properties were compared with the previous ones.