Thermoluminescence characteristics and chemical compositions of mesostases in ordinary chondrites

スポンサーリンク

概要

• 論文の詳細を見る

• Induced thermoluminescence (TL) images of ordinary chondrites, ALH-77214 (L3.4-3.5), Y-74191 (L3.6), ALH-77216 (L3.8) and ALH-78043 (L6), were measured by the TL spatial distribution readout system combined with a microscope and TL characteristics [peak temperature and peak width] of mesostases were analyzed. Their chemical compositions were also analyzed by an electron probe X-ray microanalyzer. We found that; (1) The mesostasis was responsible for much of the TL in the ordinary chondrites, (2) A mesostasis of normative anorthite compositions showed low peak temperature (∿90℃) and narrow width (∿65℃), while a mesostasis of normative albite compositions showed high peak temperature (∿125℃) and wide width (∿100℃), (3) A main phosphor in a low petrologic grade chondrite <3.5 was a high anorthite mesostasis and that in high grade chondrites >3.5 was a high albite mesostasis, (4) Some chondrules in the same fragments of the type 3 chondrites showed no or weak TL emission and these mesostases had high normative albite. These facts suggest that in type 3 ordinary chondrites; (1) The post-accretional metamorphism cannot account for the coexistence of high albite mesostases with TL emission and no emission and a high anorthite mesostasis with TL emission, (2) Low petrologic grade chondrites <3.5 have a large population of rapidly cooled chondrules and high petrologic grade chondrites >3.5 have a large population of slowly cooled chondrules.

• 国立極地研究所の論文

著者

• Ninagawa Kiyotaka

  Department Of Applied Physics Okayama University Of Science

• Kubo Hideyuki

  Okayama University Of Science

• Wada Tomonori

  Department Of Physics Faculty Of Science Okayama University

• Matsunami Satoshi

  Department of Earth Sciences, Miyagi University of Education

• Ninagawa K

  Okayama Univ. Sci. Okayama Jpn

• Matsunami Satoshi

  Naruto University of Education

• Ninagawa Kiyotaka

  Okayama University of Science

• Fujimura Shin-ichi

  Okayama University of Science

• Yamamoto Isao

  Okayama University of Science

• Wada Tomonori

  Okayama University

• Nishimura Hiroshi

  Naruto Universityof Education

• Matsunami Satoshi

  Department Of Earth Sciences Miyagi University Of Education

• Nishimura Hiroshi

  Department Of Geosciences Faculty Of Science Naruto University Of Education

関連論文

• Micro-XRD and CL analyses of coesite in UHP rocks
• Red thermoluminescence of enstatite from the Chainpur meteorite
• Thermoluminescence studies of ordinary chondrites in the Japanese Antarctic meteorite collection, IV: Asuka ordinary chondrites
• Thermoluminescence studies of ordinary chondrites in the Japanese Antarctic meteorite collection, III: Asuka and Yamato type 3
• Thermoluminescence studies of ordinary chondrites in the Japanese Antarctic meteorite collection, II: New measurements for thirty type 3 ordinary chondrites
• Thermoluminescence of chondrules in primitive ordinary chondrites,Semarkona and Bishunpur
• Silica phase as a thermoluminescence phosphor in ALH-77214 (L3.4)chondrite
• Thermoluminescence characteristics and chemical compositions of mesostases in ordinary chondrites
• Thermoluminescence study of ordinary chondrites by TL spatial distribution readout system
• Application of a spatial distribution readout system of thermoluminescence to meteorites
• Investigation of TLD Phosphors by Optical Excitation : Luminescence of Eu^ Centers in MgSO_4, CaSO_3, SrSO_4, BaSO_4
• A Proposal of the Method for Energy Measurements of Muons over 10 TeV
• Thermoluminescence of Japanese Antarctic ordinary chondrite collection
• Compositional heterogeneity of fine-grained rims in the Semarkona (LL3) chondrite
• The chemical compositions and textures of matrices and chondrule rims of unequilibrated ordinary chondrites-II. Their constituents and the implications for the formation of matrix olivine
• Thermoluminescence Dating of Fossil Calcite Shells
• A new explanation of bending of a snow density profile
• Ion Microprobe and Electron Microprobe Studies on Magnesium Isotopic Abundances in Olivine Minerals from the Allende Carbonaceous Chondrite (SIMS特集)

もっと見る 閉じる

スポンサーリンク