ID 13874
JaLCDOI
Sort Key
3
Title Alternative
Distributions and ages of the Paleogene deposits in the Kibi Plateau Area, and Paleogene paleogeography
FullText URL
Author
Tanaka, Hajime
Hotani, Shu
Yamamoto, Yasuo
Danhara, Tohru
Abstract
The "Kibi Plateau" forms a unique geomorphic province with the gently-sloping and stable continental feature. Gravel deposites called the "Mountain Gravels", are distributed sporadically in the Kibi Plateau, and have been considered Pliocene deposits. However, recent fission-track ages of the tuff beds intercalated in the deposits have indicated that the ago of deposits are Paleogen in the age. So far, fission-track ages (using zircon) of 61 to 65, 55, 37, 34 to 35 and 27 Ma are obtained. Remaining the belt-like distributions of the Paleogene gravelly valley-full deposits suggest that the Kibe Plateau has been keeping as a stable block, and repeated periods of incision followed by sedimentation of valley-fill deposits are occurred in the area during Paleogene period.
Keywords
Kibi Plateau
gravelly valley-fill deposites
fission-track ages
Paleogene palaeogeography
Publication Title
Okayama University Earth Science Report
Published Date
2003-12-20
Volume
volume10
Issue
issue1
Publisher
岡山大学理学部地球科学教室
Publisher Alternative
Department of Earth Sciences Faculty of Science, Okayama University
Start Page
15
End Page
22
ISSN
1340-7414
NCID
AN10506284
Content Type
Departmental Bulletin Paper
OAI-PMH Set
岡山大学
language
日本語
Copyright Holders
岡山大学地球科学研究報告編集委員会
File Version
publisher
NAID
Eprints Journal Name
esr