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Title Transcription
サングンタイ チュウゴク チホウ チュウブ ニ イチ スル タリ ミサカ チョウマフィックガンタイ シュウヘン ノ サイセツセイ クロムスピネル ノ カガク ソセイ
Title Alternative
Chemical Characteristics of Detrital Chromian Spinel in and around Tari-Misaka Ultramafic Complex of the Sangun Zone, Central Chugoku District Southwest Japan
File
language
jpn
Attribute
Natural Science
Author
Umeda, Tomoyuki
Description
There are many ultramafic complexes some of which have chromitite bodies in the Sangun zone in central Chugoku district, Southwest Japan. Almost all complexes are composed of harzburgite, and sometimes found dunite portion and has small amounts of chromitite in it (e.g. MITI,1993,1994; Matsumoto et al., 1995a). Especially, there are largest chromite mines which are Wakamatsu and Hirose in Northern Tari-Misaka. Exploration for podiform chromitite has been difficult, because its occurrence is usually very irregular in ultramafic complex. Matsumoto and Arai (1997) proposed that the petrological exploration for Podiform chromitite by using of spinel chemistry and morphology. This study is good method for exploration of Podiform chromitite in this area. However, in order for a precision to improve chromite exploration, we should increase the number of sample analysis and accurate quantitative study is required. In this study, we use detrital chromian spinel from river sediment in and around the Tari-Misaka ultramafic complex, Sangun zone, Southwest Japan. That is, it is expected that we can increase analysis point greatly by using detrital spinel from the river sediment than that of from the rock specimen. Many spinel(s) from the chromitite origin were recognized by this study in the river near the chromite mines of northern part of Tari-Misaka complex. This result concordant with chromitite formation model (e.g. Arai and Yurimoto, 1994; Zhou et al., 1994; Matsumoto and Arai, 1997). It became clear in particular that detrital spinel is effective as the method for evaluation of chromitite potentiality in this area.
Journal Title
島根大学教育学部紀要
Volume
46
Start Page
143
End Page
155
ISSN
18808581
Published Date
2012-12-25
NCID
AA12171265
Publisher
島根大学教育学部
Publisher Aalternative
Faculty of Education Shimane University
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
OAI-PMH Set
Faculty of Education