Variable initial zoning profiles and Fe-Mg diffusion coefficients for olivine: Effects on cooling rates calculated by diffusion modeling in a pallasite
スポンサーリンク
概要
- 論文の詳細を見る
Because chemical zoning of minerals contains information about the thermal history of the parent body, the cooling rate or burial depth can be calculated by solving the diffusion equation. Several factors influence the results of these calculations. We evaluated the cooling rate (and burial depth) calculated by using different initial (starting) zoning profiles and different diffusion coefficients on the basis of the Fe-Mg chemical zoning profile observed for pallasite (Esquel) olivine. Uncertainties in initial compositional profile and Fe-Mg diffusion coefficient in olivine both lead to error in model cooling rates. Discrepancies between different experimentally determined diffusion coefficients lead to uncertainties in model cooling rate that exceed those due to initial zoning profiles by one order of magnitude. These results highlight the need for accurate determination of diffusion coefficients in olivine.
- 国立極地研究所の論文
著者
-
Monkawa Akira
Department Of Earth And Planetary Science Graduate School Of Science University Of Tokyo
-
Koizumi Eisuke
Department Of Earth And Planetary Science Graduate School Of Science University Of Tokyo
-
Miyamoto Masamichi
Space and Planetary Science, Graduate School of Science, University of Tokyo
-
Mikouchi Takashi
Space and Planetary Science, Graduate School of Science, University of Tokyo
-
Monkawa Akira
Space and Planetary Science, Graduate School of Science,University of Tokyo
-
Koizumi Eisuke
Space and Planetary Science, Graduate School of Science,University of Tokyo
-
Mikouchi Takashi
Department Of Earth And Planetary Science University Of Tokyo
-
Miyamoto Masamichi
Department Of Earth And Planetary Science University Of Tokyo
-
Miyamoto Masamichi
Space And Planetary Science Graduate School Of Science University Of Tokyo
関連論文
- Yamato 980459: Mineralogy and petrology of a new shergottite-related rock from Antarctica
- Experimental petrology of ancient lunar mare basalt Asuka-881757: Spinel crystallization as a petrologic indicator
- Metamorphic transformations of opaque minerals in some eucrites
- Mineralogy of the Asuka 87 and 88 eucrites and crustal evolution of the HED parent body
- A Classification for Some Small Chondrites in the Yamato-74 and -75 Meteorites
- Mineralogical Examination of the Yamato-75 Achondrites and Their Layered Crust Model
- A Classification of the Yamato-75 Chondrites Based on Chemical Compositions of Olivines and Pyroxenes
- Mineralogical Examination of the Allan Hills No.5 Meteorite
- Yamato Achondrite Polymict Breccias
- A Preliminary Mineralogical Examination of the Yamato-74 Achondrites
- A Classification for the Yamato-74 Chondrites Based on the Chemical Composition of their Olivines and Pyroxenes
- Mineralogy of Yamato 983885 lunar polymict breccia with a KREEP basalt,a high-Al basalt, a very low-Ti basalt and Mg-rich rocks
- Visible and near-infrared reflectance spectroscopy of the Yamato 980459 meteorite in comparison with some shergottites
- Reflectance spectra of the Yamato 000593 nakhlite: Spectroscopic similarities to other nakhlites
- Comparison of Fe-Mg interdiffusion coefficients in olivine
- Mineralogy and petrology of Yamato 000593: Comparison with other Martian nakhlite meteorites
- Comparative mineralogy of magmatic inclusions in olivine from the Chassigny and Nakhla martian meteorites
- Variable initial zoning profiles and Fe-Mg diffusion coefficients for olivine: Effects on cooling rates calculated by diffusion modeling in a pallasite
- Origin of olivine megacrysts and the groundmass crystallization of the Dar al Gani 476 shergottite