Melting Experiments on a Yamato Chondrite

スポンサーリンク

概要

• 論文の詳細を見る

• One-atmosphere melting experiments have been carried out on Yamato L6 chondrite 74354 at temperatures 1125°, 1200°and 1275℃ and at Po_2 (oxygen partial pressure) between (10)^<-16> and (10)^<-8> atm. The compositions of olivine, Ca-poor pyroxene, Fe-Ni metal and liquid have been determined as functions of temperature and Po_2; for example, the composition of olivine varies from Fo_<62> to Fo_<87> and that of metal varies from Fe_<20>Ni_<80> to Fe_<94>Ni_6 as Po_2 varies from (10)^<-12> to (10)^<-16> atm at 1125℃, and from Fo_<66> to Fo_<77> and from Fe_<40>Ni_<60> to Fe_<84>Ni_<16> respectively as temperature varies from 1125°to 1275℃ at (10)^<-14> atm Po_2. Based on these experimental data, Po_2 for equilibration of this chondrite is estimated as about (10)^<-20> atm. The compositions of liquids coexisting with olivine, Ca-poor pyroxene and Fe-Ni metal at Po_2 lower than (10)^<-8.5> atm are within the compositional ranges of howardite and eucrite, suggesting that chondrites may have a genetical relationship with these basaltic achondrites.

• 国立極地研究所の論文

著者

• Kushiro Ikuo

  Geological Institute University Of Tokyo

• Kushiro Ikuo

  Geological Institute Faculty Of Science University Of Tokyo

• Mysen B.O.

  Geophysical Laboratory, Carnegie Institute of Washington

• Mysen B.o.

  Geophysical Laboratory Carnegie Institute Of Washington

関連論文

• Vaporization experiments in the system plagioclase-hydrogen
• Chapter 25 Formation of Liquid and Condensation of Gas in the Primitive Solar Nebula : Part VII Formation of Asteroids and Meteorites : Origin of the Solar System
• Chemical compositions of Antarctic meteorites I
• An electron microscopic study of gas condensates in the system Mg-Si-O-H
• Finding of Breccia Containing Ultramafic Inclusions and Clinopyroxene Megacrysts in Tsuyama,Western Japan(短報)
• Petrology of chondrules, inclusions and isolated olivine grains in ALH-77307 (CO3) chondrite
• A NOTE ON SILICATE LIQUID IMMISCIBILITY IN JAPANESE VOLCANIC ROCKS
• Investigations on the Experimentally Produced Chondrules: Chemical Compositions of Olivine and Glass and Formation of Radial Pyroxene Chondrules
• Melting Experiments on a Yamato Chondrite
• Experimental Determination of Composition of Melt Formed by Equilibrium Partial Melting of Peridotite at High Pressures Using Aggregates of Diamond Grains.
• Floatation of plagioclase in magma at high pressures and its bearing on the origin of anorthosite.

もっと見る 閉じる

スポンサーリンク