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タイトルヨミ
ダイ29ジ ナンキョク チイキ カンソクタイ ニ ヨッテ サイヨウ サレタ 2 3 ノ ナンキョクサン コウブツ ノ サンジョウ ト トクチョウ
日本語以外のタイトル
Some Notes on Several Characteristic Minerals Sampled from East Antarctica
ファイル
言語
日本語
著者
林 正久
三浦 清
内容記述(抄録等)
Chemical analysis using EPMA has been carried out on several minerals sampled from East Antarctica with special reference to secondary minerals. Results are summarized as follows:
In the Balchenfjella region, eastern part of the Sφr Rondane Mountains, East Antarctica, most of the secondary minerals are proved to be pure gypsum crystals, although they take various forms from place to place, for example perfectly-formed gypsum crystals, finely-stratified board-like gypsum, mushroom-like crystals and so on.
In the northern part of the Balchenfjella region, desert varnish is defined to be composed of crystalline jarosite mixed with amorphous silica and to be formed by solution of surfuric acid which ascends by capirally action through very narrow cracks within the inner fresh region of a gneiss rock. This solution of surfuric acid is probably supplied from underlying ground. It is sometimes observed that these crystals of desert varnish work to open the crack within the inner region of rock, futhermore, causing the rock disintegration. This fact is noticeable to consider the mechanism of salt weathering under arctic dry condition.
Varved clay sampled from the fluvioglacial valley of the Mt. Riiser-Larsen area, Amundsen Bay, Enderby Land has also been examined. It is clearly defined that great amount of vivianite was contained within the varved clay. Phosphatic acid which is necessary for the vivianite formation may safely be said to have been provided from droppings of bird such as Pygoscelis adeliae and Catharaota maccormicki.
掲載誌名
島根大学教育学部紀要. 自然科学
23
1
開始ページ
1
終了ページ
24
ISSN
05869943
発行日
1989-07-25
NCID
AN00107941
出版者
島根大学教育学部
出版者別表記
The Faculty of Education Shimane University
資料タイプ
紀要論文
部局
教育学部
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