Ordinary chondrite metallography: Part 1. Fe-Ni taenite cooling experiments
نویسندگان
چکیده
منابع مشابه
SIDEROPHILE ELEMENT ABUNDANCES IN Fe-S-Ni-O MELTS SEGREGATED FROM PARTIALLY MOLTEN ORDINARY CHONDRITE UNDER DYNAMIC CONDITIONS. T . Rushmer,
Introduction: Early differentiation in evolving planetesimals likely involved a variety of different physical mechanisms. Fe-rich metallic liquid segregation can occur in a solid, partially molten, or purely molten silicate body, with or without the presence of deformation. Deformation may assist the segregation of low degree metallic melts. Segregation of Fe-S-Ni liquids formed by variable deg...
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We report a pilot study of a new technique to use the distribution of Co between kamacite and taenite to infer relative cooling rates of iron meteorites; data of Widge and Goldstein (1977) showed that the distribution is temperature dependent. A plot of the logarithm of the double ratio [(Co/Ni)kamacite/(Co/Ni)taenite] (abbreviated Rac) against inverse temperature yields a linear equation showi...
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Fe-Ni alloys, which are kamacite (<10 wt% Ni), taenite (30 ~ 40 wt % Ni), and tetrataenite (ordered Fe 50 Ni 50), are the dominant magnetic minerals in the metamorphic (type 5-6) ordinary chondrites [1], and the carrier of the remanent magnetization is high coercivity tetrataenite [1,2,3]. Metallographic studies reported that there are two types of Fe-Ni grains in the metamor-phic ordinary chon...
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Low cost, earth abundant, rare earth free magnetocaloric nanoparticles have attracted an enormous amount of attention for green, energy efficient, active near room temperature thermal management. Hence, we investigated the magnetocaloric properties of transition metal based (Fe70Ni30)100-xCrx (x = 1, 3, 5, 6 and 7) nanoparticles. The influence of Cr additions on the Curie temperature (TC) was s...
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Introduction: Micrometeorites (MMs) are large (>25 µm) interplanetary dust particles that survive atmospheric entry to be recovered from the Earth's surface. Amongst those particles that escaped significant heating during atmospheric entry two groups have been identified [1]: (i) fine-grained MMs (fgMMs), which are similar to the fine-grained matrices of hy-drated carbonaceous chondrites (CCs),...
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ژورنال
عنوان ژورنال: Meteoritics & Planetary Science
سال: 2003
ISSN: 1086-9379,1945-5100
DOI: 10.1111/j.1945-5100.2003.tb00007.x