このエントリーをはてなブックマークに追加
ID 52525
本文ファイル
別タイトル
On the Neogene Tertiary in the Fukaura District, Aomori Prefecture, with Special Reference to the Manganese Ore Deposits
著者
盛谷 智之
抄録(英)
The district concerned is located in the green tuff region along the coast of Japan Sea, Northern Honshu. The stratigraphic sequence of the Neogene Tertiary intercalating the beds of manganese dioxide ore is therein, in descening order, shown as follows:
[Original table is skipped. For more details, please refer to the full text.]
The uppermost formation is of non-marine facies, while the remainders are of marine ones.
In the district, there appear two structural trends: one points to NS as is represented by the pre-vailing anticlinal axis of fold and fault with the same direction, and the other to NW-SE as is shown by the anticlinal axis of fold and fault revealing the similar trend.
The volcanic rocks are distributed inferably in a close relation to the geologic structure. Especially, the pyroxene andesites relating intimately to genesis of the ore deposits are located in the marginal place around the intersection between two different anticlinal fold-axes alluded to above.
In connection with the geology briefly mentioned above, the ore deposits are generally considered as follows:
1) Because of the tabular or bedding form and of being intercalated conformably in the strata, the deposits in question are infered to be of sedimentary origin.
2) . Basing on the fact that the ores are found deposited restrictively in the strata lying over the pyroxene andesites, it seems sure that the, manganese in the deposits might have been derived chiefly from the submarine hot spring during the postvolcanism of the pyroxene andesites and partly from weathering of the same volcanics after their eruptions.
3) That the formations including the ore deposits are of 'marine facies produced with mixing of fresh water suggests the facility for oxidation of the ore into manganese dioxide.
4) The ore deposits are used to occurring in the formations correlative to the Nishikurosawa and Onnagawa formations of the middlle Miocene.
内容記述
木野崎吉郎教授退官記念特集号
掲載誌名
廣島大學地學研究報告
12号
開始ページ
131
終了ページ
147
出版年月日
1963-03-30
出版者
廣島大學理學部地學教室
ISSN
0073-2303
NCID
言語
日本語
NII資源タイプ
紀要論文
広大資料タイプ
学内刊行物(紀要等)
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
部局名
理学研究科
他の一覧