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1980•Zeitschrift für Naturforschung AOpen access

Mineralogical and Petrographical Study of the Zaisho Meteorite, a Pallasite from Japan

Makoto Shima, Akihiko Okada, H. Yabuki

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Abstract

Abstract The Zaisho meteorite, a pallasite from Japan, is primarily composed of nickel-iron and olivine, and contains minor amounts of troilite, schreibersite, chromite and farringtonite. The olivine of this meteorite is Fa18.6 in molar composition, and exhibits non-rounded morphology. About 17% of the olivines are kinked crystals. The formational temperature was estimated to be 1220 °C from the Mg-Fe 2+ distribution coefficient in the coexisting olivine-chromite pair.

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Abstract The Zaisho meteorite, a pallasite from Japan, is primarily composed of nickel-iron and olivine, and contains minor amounts of troilite, schreibersite, chromite and farringtonite. The olivine of this meteorite is Fa18.6 in molar composition, and exhibits non-rounded morphology. About 17% of the olivines are kinked crystals. The formational temperature was estimated to be 1220 °C from the Mg-Fe 2+ distribution coefficient in the coexisting olivine-chromite pair.

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Available abstract

Abstract The Zaisho meteorite, a pallasite from Japan, is primarily composed of nickel-iron and olivine, and contains minor amounts of troilite, schreibersite, chromite and farringtonite. The olivine of this meteorite is Fa18.6 in molar composition, and exhibits non-rounded morphology. About 17% of the olivines are kinked crystals. The formational temperature was estimated to be 1220 °C from the Mg-Fe 2+ distribution coefficient in the coexisting olivine-chromite pair.

Key concepts: Troilite, Chromite, Olivine, Meteorite, Geology, Mineralogy, Geochemistry, Ilmenite

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