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タイトルヨミ
ヒロシマケン キミタ チイキ ニ ブンプ スル ビホク ソウグン : ヒカイセイ タイセキブツ ノ タイセキ カンキョウ ニ ツイテ
ファイル
言語
日本語
著者
菅本 尚子
内容記述(抄録等)
The Middle Miocene Bihoku Group is sporadically distributed in the Chugoku-district,southwest Japan.Non-marine sediments are recognized of the base of the Bihoku Group in many regions.In the Miyoshi and Shobara regions,it is called“Shiomachi Formation”.
In the Kimita region,non-marine sediments of the base of Bihoku Group are described sedimentologically,and five sedimentary facies are recognized on the basis of facies analysis.The sedimentary facies indicate sedimentary environments such as talus,alluvial fan,fan-delta,and saline swamp.
The mud,muddy sand and sand interleaved in conglomerate beds were analyzed for C,N,S contents.The results indicate that the sedimentary environment of the muddy sand including lignite in Facies C was a swamp under fresh water,and the sand including lignite in Facies E was deposited in a saline swamp such as a mangrove swamp.
As a result of facies analysis and C,N,S element analysis,we consider that the basal conglomerate of the Bihoku Group formed a alluvial fan at the first stage,and changed to fan-delta by relative sea level change.
In Kimita area,the non-marine sediments of the conglomerate bed should be separated from the non-marine“Shiomachi Formation”,considering the palaeoenvironmental differences.
掲載誌名
島根大学地球資源環境学研究報告
20
開始ページ
99
終了ページ
107
ISSN
13439774
発行日
2001-12-28
NCID
AA11455176
出版者
島根大学総合理工学部地球資源環境学教室
出版者別表記
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
業績ID
e18445
部局
(旧組織)大学院総合理工学研究科
備考
12-14,16+ / 1993+
中山勝博助教授追悼特集
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