Coastal Depositional Dynamics of Wave, Tide and Current

波浪、潮汐和海流的海岸沉积动力学

• 批准号: 10640445
• 负责人: KUMASHIRO Hiroko
• 金额: $ 1.66万
• 依托单位: Natural History Museum and Institute, China
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640445/
• 关键词: Delta; Bay-Spit; Sedimedntary Structure; Grain Size Distribution; 三角州堆積物; 完新統; 古東京湾南縁; 下総層群; バックセット層理; テクトニクス; 手取層群桑島層; River-dominated delta; 化石壁; 河川; 氾濫原; 更新統; ギルバート型三角州; 下総層群上泉層

Facies analysis was applied to the study of depositional dynamics of ancient coastal deposits. Coastal deposits are formed by process of wave, tide and currents. Purpose of this research is to extract feature of coastal process from ancient deposits.A Gilbert-delta in the Shimosa Formation has a steeply dipping, large -scale foreset with a variety of fades, mainly products of sediment gravity flows on subaqueous slope.A spit-bay depositional system was reconstructed at the heads of Paleo Tokyo-Bay from the shape of basin and facies distribution of the formation. The spit developed during transgression associated with interglacial period.I use grain-size distributions to compare sediment transport processes in the Holocene small deltas on the high-energy Veracruz coastal margin, southwestern Gulf of Mexico. The grain-size characteristics identify similarities and differences between surficial samples, and textural attributes help distinguish different depositional conditions in the environments of each delta.

将相分析方法应用于古海岸沉积动力学研究。海岸沉积是由波浪、潮汐和海流共同作用形成的。本研究的目的是从古沉积中提取海岸过程特征。岛佐组吉尔伯特三角洲具有陡峭、大范围的前积，具有多种相变，主要是水下斜坡上沉积物重力流动的产物。从盆地形态和地层相分布上重建了古东京湾头部的泥盆-海湾沉积体系。在与间冰期有关的海侵期间发育的唾液。我利用粒度分布来比较墨西哥湾西南部高能韦拉克鲁斯海岸边缘全新世小三角洲的泥沙运移过程。颗粒大小特征识别了表层样品之间的异同，结构属性有助于区分每个三角洲环境中不同的沉积条件。

项目成果

岡崎(熊代)浩子: "総合研究「房総の地史-堆積相,古生物相の変遷-」"千葉中央博自然誌研究報告特別号. 4. 1-3 (2001)

冈崎博子（熊城）：“综合研究‘房总的地质历史-沉积相和古生物相的变化-’”千叶中央博览会自然历史研究报告特刊4. 1-3（2001）。

Okazaki, H., Isaji, S. and Nakazato, H.: "Pleistocene Gilbert-type coarse-grained delta, the Kamiizumi Formation, Shimosa Group, Japan"Jour. Geol. Soc. Japan. Vol.106, No.7. 461-471 (2000)

Okazaki, H.、Isaji, S. 和 Nakazato, H.：“更新世 Gilbert 型粗粒三角洲，日本 Shimosa 群上泉组”Jour。

岡崎浩子, 佐藤弘幸, 中里裕臣: "更新統下総層群の形成ダイナミクス"第四紀研究. 40(3). 243-250 (2001)

Hiroko Okazaki、Hiroyuki Sato、Hiroomi Nakazato：“更新世 Shimoso 群的形成动力学”第四纪研究 40(3) (2001)。

Okazaki, H.: "Significance of Tectonic Movement and Eustatic Sea-Level Changes to Depositional Systems of Palaeo-Tokyo Bay, Analyzed from the Pleistocene Shimosa group, Japan"J. Nat. Hist. Mus. Inst., Chiba. Special Issue No.4. 5-12 (2001)

冈崎，H.：“构造运动和海平面升降对古东京湾沉积系统的意义，从日本更新世 Shimosa 群分析”J。

Uda Takashi, Ichiro Takeda, Hidekazu Tsujimoto, Keiji Mizuno, Hiroko Okazaki: "Boso : Coastal Geomorhpulogy and Environments"Fifth International Conference on Geomorphology Field Excursion. A4. 1-16 (2001)

Uda Takashi、Ichiro Takeda、Hidekazu Tsujimoto、Keiji Mizuno、Hiroko Okazaki：“Boso：海岸地貌学与环境”第五届国际地貌学实地考察会议。