ログイン
言語:

WEKO3

  • トップ
  • ランキング
To
lat lon distance
To

Field does not validate



インデックスリンク

インデックスツリー

メールアドレスを入力してください。

WEKO

One fine body…

WEKO

One fine body…

アイテム

  1. 131 地震研究所
  2. 東京大学地震研究所彙報
  3. 76
  4. 1
  1. 0 資料タイプ別
  2. 30 紀要・部局刊行物
  3. 東京大学地震研究所彙報
  4. 76
  5. 1

日高山脈のテクトニクスと上昇過程 : 熱放射年代学からの検討

https://doi.org/10.15083/0000032630
https://doi.org/10.15083/0000032630
77277320-4248-4e94-97c5-1fa7a3211778
名前 / ファイル ライセンス アクション
ji0761009.pdf ji0761009.pdf (1.3 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2012-03-29
タイトル
タイトル 日高山脈のテクトニクスと上昇過程 : 熱放射年代学からの検討
言語 ja
言語
言語 jpn
キーワード
主題Scheme Other
主題 Mountain uplift
キーワード
主題Scheme Other
主題 Hidaka Mountains
キーワード
主題Scheme Other
主題 Thermochronology
キーワード
主題Scheme Other
主題 Thrusting
キーワード
主題Scheme Other
主題 Molasse
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
ID登録
ID登録 10.15083/0000032630
ID登録タイプ JaLC
その他のタイトル
その他のタイトル Tectonics and Uplift Process of the Hidaka Mountains, Hokkaido, Japan inferred from Thermochronology
著者 在田, 一則

× 在田, 一則

WEKO 75659

在田, 一則

Search repository
雁澤, 好博

× 雁澤, 好博

WEKO 75660

雁澤, 好博

Search repository
板谷, 徹丸

× 板谷, 徹丸

WEKO 75661

板谷, 徹丸

Search repository
著者別名
識別子Scheme WEKO
識別子 75662
姓名 Arita, Kazunori
著者別名
識別子Scheme WEKO
識別子 75663
姓名 Ganzawa, Yoshihiro
著者別名
識別子Scheme WEKO
識別子 75664
姓名 Itaya, Tetsumaru
著者所属
著者所属 北海道大学大学院理学研究科地球惑星科学専攻
著者所属
著者所属 北海道教育大学教育学部函館校
著者所属
著者所属 岡山理科大学自然科学研究所
抄録
内容記述タイプ Abstract
内容記述 The Hidaka Collision Zone in the southern part of Central Hokkaido including the Hidaka Mountains has undergone two types of collision since the Early Tertiary. The Hidaka Mountains consist of the Hidaka Metamorphic Belt in the eastern main part and the Poroshiri Ophiolite Belt in the western marginal part. The former is composed of a steeply eastward-tilted crustal succession of the paleo-Hidaka magmatic arc, and is separated from the latter by the Hidaka Main Thrust. Recent vibroseismic reflection profiling across the collision zone imaged delamination-wedge tectonics of the lower crust beneath the Hidaka Mountains. We performed radiometric dating on biotite and hornblende using the K-Ar method, and on zircon using the Fission-Track method to clarify the process and the mechanism of uplift of the Hidaka Mountains. The minerals dated were obtained from metamorphic and tonalitic rocks of the southern Hidaka Metamorphic Belt, and also from metamorphic and tonalitic cobbles constituting the middle to late Miocene molasse occurring in the western foreland and eastern hinterland basins of the southern Hidaka Mountains. The cobbles in these formations were derived from the proto-Hidaka Mountains. The conclusions are as follows: 1. K-Ar ages of biotites from cobbles in the molasse, the sedimentary ages of which are 12-7 Ma, differ according to origin in the hinterland or foreland basins. The ages from the hinterland basin vary successively from lower (45.9 Ma) to upper (33.1 Ma) stratigraphic levels. The ages from the foreland basin, however, vary between 19.3 Ma and 16.4 Ma, regardless of their stratigraphic positions. These differences indicate that denudation (uplift) was slow and steady in the hinterland basin, but rapid and complex in the foreland basin during the middle to late Miocene. 2. Such a difference in the biotite K-Ar ages between the two sides is caused by the rotational uplift of the mountain due to thrusting along the Hidaka Main Thrust in the west and normal faulting in the east. The rotational uplift resulted in the rather fast denudation rates (0.9-1.4 mm/yr) in the foreland basin during the middle to late Miocene. 3. Denudation of the mountains estimated from K-Ar ages for biotites and hornblendes, and FT ages for zircons from the Hidaka granitic and metamorphic rocks remained fast (5-6 mm/yr) during the late Early Miocene, after which it slowed to 0.4-0.6 mm/yr on average. 4. The fast denudation (uplift) rates (up to 6 mm/yr) of the Hidaka Mountains during Early Miocene age was due to thrusting in the late stage of dextral transpression between Eurasia and Pacific plates. The rotational uplift of the mountains occurred in the Middle Miocene, and resulted in different styles of uplift between the sides of the mountains. From the late Miocene onward, the westward movement caused by the westward migration of the Kuril forearc shifted to the west, forming a foreland fold-and-thrust belt in the west.
書誌情報 東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo

巻 76, 号 1, p. 93-104, 発行日 2001-07-25
ISSN
収録物識別子タイプ ISSN
収録物識別子 00408972
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AN00162258
日本十進分類法
主題Scheme NDC
主題 453
出版者
出版者 東京大学地震研究所
出版者別名
Earthquake Research Institute, University of Tokyo
戻る
0
views
See details
Views

Versions

Ver.1 2021-03-01 16:15:57.013306
Show All versions

Share

Mendeley Twitter Facebook Print Addthis

Cite as

エクスポート

OAI-PMH
  • OAI-PMH JPCOAR 2.0
  • OAI-PMH JPCOAR 1.0
  • OAI-PMH DublinCore
  • OAI-PMH DDI
Other Formats
  • JSON
  • BIBTEX

Confirm


Powered by WEKO3


Powered by WEKO3