中部日本のチャート中の石英の結晶度:その信頼性および地質学的応用

Material type: その他

Author: HATTORI, Isamuほか

Publisher: 福井市自然史博物館

Publication date: 2008-12

Material Format: Digital

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Note (General)：: 出版タイプ： AOCrystallinity indices of quartz(CI) determined by X-ray analysis have been reported in various types of chert of different ages. Reported CI'...

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Material Type: その他
Title: 中部日本のチャート中の石英の結晶度:その信頼性および地質学的応用
Author/Editor: HATTORI, Isamu
UMEDA, Miyuki
服部, 勇
梅田, 美由紀
Author Heading: HATTORI, Isamu
UMEDA, Miyuki
服部, 勇
梅田, 美由紀
Publication, Distribution, etc.: 福井市自然史博物館
Publication Date: 2008-12
Publication Date (W3CDTF): 2008
Alternative Title: Crystallinity indices of quartz in chert of Central Japan: their reliability and some geological applications
Periodical title: Bulletin of Fukui City Museum of Natural History
No. or year of volume/issue: 55
Volume: 55
Pages: 17-32
Subject Heading: crystallinity index
quartz
chert
diagenesis
provenance
thermal
effect
XRD
結晶度
石英
チャート
続成過程
供給地
熱史
X線解析
Target Audience: 一般
Note (General): 出版タイプ： AO
Crystallinity indices of quartz(CI) determined by X-ray analysis have been reported in various types of chert of different ages. Reported CI's distribute from <1 to 10. The difference may result from the difference in sample state prepared for determination of CI or existence of essential variation in crystallinity of quartz. We determined CI of many euhedral quartz crystals and quartz in cherts in different sample states, and could conclude that CI does not depend largely on sample states prepared with different methods, but depends partially on euhedral macroquartz used as a standard material. Even after removing this disadvantage, there is still wide difference in CI of quartz, indicating that CI is not uniform but varies according to the mode of origin and the thermal processes having operated on the quartz. Our data coupled with data described in literature show that 1) CI's in Cenozoic deep-sea oozes and cherts are lower than those in Mesozoic bedded chertz on land, 2) bedded cherts suffering thermal effect are characterized by higher CI, 3) CI's lacustrine and fluvial cherts are higher than those of bedded cherts of deep-sea origin, 4) CI's of older cherts are generally larger than those of younger cherts of the similar origin. This analysis suggests that CI can be used as a useful indicator deciphering origin of sedimentary siliceous rocks and their diagenetic and metamorphic stages.
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ