First Discovery of an Ultra-refractory Nodule in an Allende Fine-grained
نویسندگان
چکیده
INCLUSION. H. Hiyagon, A. Hashimoto, M. Kimura and T. Ushikubo, Department of Earth & Planetary Science, University of Tokyo (7-3-1 Hongo, Bunkyo, Tokyo, 113-0033, Japan) (H.H.: [email protected]), Department of Earth & Planetary Sciences, Hokkaido University (Kita-ku, N10-W8, Sapporo 060-0810, JAPAN), Astrophysics & Planetary Science, Faculty of Science, Ibaraki University (Mito 310-8512, Japan).
منابع مشابه
Ultra-Fine Grained Dual-Phase Steels
This paper provides an overview on obtaining low-carbon ultra-fine grained dual-phase steels through rapid intercritical annealing of cold-rolled sheet as improved materials for automotive applications. A laboratory processing route was designed that involves cold-rolling of a tempered martensite structure followed by a second tempering step to produce a fine grained aggregate of ferrite and ca...
متن کاملPanguite, (Ti4+,Sc,Al,Mg,Zr,Ca)1.8O3, a new ultra-refractory titania mineral from the Allende meteorite: Synchrotron micro-diffraction and EBSD
Panguite (IMA 2010-057), (Ti,Sc,Al,Mg,Zr,Ca)1.8O3, is a new titania, occurring as fine-grained crystals with Ti-rich davisite in an ultra-refractory inclusion within an amoeboid olivine inclusion from the Allende CV3 carbonaceous chondrite. The phase was characterized by SEM, EBSD, synchrotron micro-diffraction, micro-Raman spectroscopy, and EPMA. The mean chemical composition of the type pangu...
متن کاملNew Ultra-refractory Mineral in Allende
DISCOVERY OF KANGITE, (Sc,Ti,AI,Zr,Mg,Ca,o)20 3, A NEW ULTRA-REFRACTORY MINERAL IN ALLENDE Chi Ma1·, Oliver Tschauner1·2, John R Beckett1, George R Rossman1, Wenjun Liu 1Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 , USA; 2High Pressure Science and Engineering Center and Department of Geoscience, University of Nevada, Las Vegas, NV 89154,...
متن کاملNoble Gases in Allende Fluffy and Compact Cais
The Ne and Ar isotopic composition of Allende CAIs can consistently be explained by cosmogenically produced Ne and Ar. Thereby, the extraordinary chemistry of CAIs and the large preatmospheric size of Allende, which may cause significant cosmogenic production of Ar from Cl, were taken into account. In contrast to earlier workers, we conclude that no trapped noble gas components are needed to ex...
متن کاملEvolution of texture in an ultrafine and nano grained magnesium alloy
The evolution of texture was discussed during the formation of ultra-fine and nano grains in a magnesium alloy severely deformed through accumulative back extrusion (ABE). The microstructure and texture obtained after applying multiple deformation passes at temperatures of 100 and 250°C were characterized. The results showed that after single ABE pass at 100°C an ultrafine/nano grained microstr...
متن کامل