ダウンロード数 : ?
Title Transcription
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
File
language
jpn
Author
Sugamoto, Naoko
Description
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.
Journal Title
島根大学地球資源環境学研究報告
Volume
20
Start Page
99
End Page
107
ISSN
13439774
Published Date
2001-12-28
NCID
AA11455176
Publisher
島根大学総合理工学部地球資源環境学教室
Publisher Aalternative
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Interdisciplinary Graduate School of Science and Engineering
Remark
12-14,16+ / 1993+
中山勝博助教授追悼特集
このエントリーをはてなブックマークに追加