Research for tectono-eustatism in the Quaternary Period

第四纪构造-海平面平衡研究

• 批准号: 06640588
• 负责人: KIKUCHI Takao
• 金额: $ 0.51万
• 依托单位: Faculty of Science, Tokyo Metropolitan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06640588/
• 关键词: Quaternary; Tectono-eustasy; Sea-level change; Sedimentary cycle; Marine Pleistocene; Kanto Tectonic Basin; Fore-arc basin; テクトノユ-スタシ-; 房総半島; ワンガヌイ盆地; 累積構造; 海成段丘; 堆積物荷重; アイソトープステージ3; 更新世; 宮崎平野; 最終氷期; グレーシャルユ-スタシ-; 隆起運動

One of the characteristics of the marine Middle Pleistocene Shimosa Group, the Boso Peninsula, is a continuous sequence of several formations controlled by glacio-eustasy, and the other characteristics is so-called sedimentary imbricate structure. It was supposed that these structures were formed under continuous subsidence of the Kanto Tectonic Basin and remarkable uplift of the south end of the Peninsula. However, since the basin is situated on the wide uplift belt of the Izu-Mariana arc and original feature of the basin was one of the fore arc basins related to the South-western Japan arc, the tectonic subsidence is a doubtful process. It seems that the Kanto Basin have been uplifted during the Pleistocene Period.Owing to interpretation of the paradoxical broblem, a hypothetical idea was presented namely tectono-eustatic sea-level rise. The idea is supported by geological data of some other Quaternary tectonic basins in Japanese Islands, the Osaka basin, the Niigata basin and other. The process of sea-level rise during the Pleistocene is presumed based on the geological data of the south-Kanto district as follows : the sea-level stagnated at the level about -500m or more around 1ma, consequently it rapidly rised and stagnated gradually, and reached to present sea-level till about 200ka. After then tectonic uplift of land area standed out and marine terraces were formed along these coastal regions.

海相中更新统Shimosa群-房总半岛的特征之一是受冰川-冰川控制的多个地层的连续序列，另一个特征是所谓的沉积叠瓦状构造。这些构造是在关东构造盆地持续沉降和半岛南端显著隆升的条件下形成的。然而，由于该盆地位于伊豆-马里亚纳弧的广阔隆起带上，其原始特征是与西南日本弧有关的弧前盆地之一，因此构造沉降过程是一个可疑的过程。关东盆地在更新世时期似乎曾发生过隆升，通过对这一矛盾问题的解释，提出了构造-海平面上升假说。这一观点得到了日本列岛、大坂盆地、新泻盆地等第四纪构造盆地地质资料的支持。根据关东南部地区的地质资料，推测更新世海平面上升的过程为：1 ma左右，海平面停滞在-500m以上，随后迅速上升，并逐渐停滞，直到200 ka左右才达到现今海平面。之后，陆地区域的构造隆起突出，并沿这些沿海地区形成沿着海洋阶地。

项目成果

Suzuki, T.et al.: "Comment on "Characteristics of Japanese Loam, and its eorian origin" by Hayakawa" Bull.Volc.Soc.Japan. 40. 218-220 (1995)

Suzuki, T.et al.：“对早川的“日本壤土的特征及其风纪起源”的评论”Bull.Volc.Soc.Japan。

鈴木毅彦: "早川論文「日本に広く分布するローム層の特徴とその成因」へのコメント" 火山. 40. 218-220 (1995)

Takehiko Suzuki：“对早川论文《日本广泛分布的壤土层的特征和起源》火山的评论。40. 218-220 (1995)

Kikuchi, T.: "Forming Process of Marine Pleistocene Succession, The Shimousa Group, in The Kanto Tectonic Basin." Earth Science. 51 (in print). (1977)

Kikuchi, T.：“关东构造盆地下萨群海洋更新世演替的形成过程”。

鈴木毅彦: "いわゆる火山灰土(ローム)の成因に関する一考察-中部関東に分布する火山灰土の層厚分布" 火山. 40. 167-176 (1995)

铃木武彦：“关于所谓火山灰土（壤土）起源的研究 - 分布在关东中部的火山灰土的厚度分布” 火山 40. 167-176 (1995)

Kikuchi,Takao: "A new interpretation of forming process of marine pleistocene sucession in the kanto tectonic basin" Geographical Reports of Tokyo Metropolitan University. No.31. 65-81 (1996)

菊地高夫：“关东构造盆地海相更新世演替形成过程的新解释”，东京都立大学地理报告。