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  1. B100 理学部/理学研究科
  2. B100b 紀要
  3. The Journal of earth and planetary sciences
  4. 41

Th, U and Pb analytical data of monazites used in the paper ”Electron microprobe observations of Pb diffusion in metamorphosed detrital monazite”

https://doi.org/10.18999/joueps.41.75
https://doi.org/10.18999/joueps.41.75
7c3cd0c6-b07e-4d90-b23d-e9cabb86c4c5
名前 / ファイル ライセンス アクション
KJ00000037580.pdf KJ00000037580.pdf (645.8 kB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2006-01-05
タイトル
タイトル Th, U and Pb analytical data of monazites used in the paper ”Electron microprobe observations of Pb diffusion in metamorphosed detrital monazite”
言語 en
著者 Suzuki, Kazuhiro

× Suzuki, Kazuhiro

WEKO 3273

en Suzuki, Kazuhiro

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Adachi, Mamoru

× Adachi, Mamoru

WEKO 3274

en Adachi, Mamoru

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Kajizuka, Izumi

× Kajizuka, Izumi

WEKO 3275

en Kajizuka, Izumi

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
抄録
内容記述 This is a data-set paper, listing a total of 1052 electron microprobe ThO_2,UO_2 and PbO analyses of monazites from gneiss and granitoid samples in the Ryoke metamorphic belt, Southwest Japan (Table 1). On the basis of these data, we have estimated the duration for the peak stage of the Ryoke metamorphism and evaluated diffusion parameters for Pb in monazite (Suzuki et al., 1994). The principal results are : (1) Two samples of psammitic gneiss contain detrital monazites whose CHIME ages date back to the Precambrian as old as 1700 Ma. Several detrital grains are immune from overgrowth during the Ryoke metamorphism, and show marginal Pb-loss by diffusion from the surface. The width of the diffusion rims range 18-22μm for grains in the sample of the andalusite-sillimanite transition zone (620℃) and 48-58μm for those in the sample of the sillimanite-orthoclase zone (680℃).(2) The temperature-time relation of the Ryoke gneiss are (a) first attainment of the amphibolite facies conditions (525±25℃) at 98.8-98.0 Ma, (b) peak metamorphism at 95.2±3.9 Ma, and (c) subsequent retrogression to 500° at 90 Ma and to 300℃ at 84 Ma.(3) The Pb diffusion coefficients, calculated from the observed Pb profiles on the assumption of an isothermal step of 5 Ma duration, are 1.9(±0.3)×10^<-21>cm^2/sec for 620℃ and 1.5(±0.3)×10 ^<-20>cm^2/sec for 680℃. These data yielded an activation energy of 2.44(+2.85/-1.26)×10^5 J/mol and a frequency factor of 3.4×10^<-7>(8.5×10^<-12>-2.2×10^7)cm^2/sec for Pb diffusion in monazite.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 国立情報学研究所で電子化したコンテンツを使用している。
言語 ja
内容記述タイプ Other
出版者
言語 en
出版者 Dept. of Earth and Planetary Sciences, Nagoya University
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ID登録
ID登録 10.18999/joueps.41.75
ID登録タイプ JaLC
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0919875X
書誌情報 en : The Journal of earth and planetary sciences, Nagoya University

巻 41, p. 75-81, 発行日 1994-12
フォーマット
application/pdf
著者版フラグ
値 publisher
URI
識別子 http://hdl.handle.net/2237/2822
識別子タイプ HDL
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