Study on Quaternary Geological Characteristics of Echigo Plain

越后平原第四纪地质特征研究

• 批准号: 07640597
• 负责人: KOBAYASHI Iwao
• 金额: $ 1.41万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640597/
• 关键词: Quaternary; Echigo Plain; stratigraphy; paleoenvironment; paleogeography; 層序

The stratigraphy of Quaternary deposits of the Echigo Plain was examined and correlated with that of the surrounding areas. Especially, the subsurface strata in the plain were made clear stratigraphically. The new stratigraphical division and the geologic age of them were established. They are divided into the Nishiyama Formation, the Haizume Formatin, the unnamed Middle Pleistocene, the Kanbara Group, Buried terrace deposits, the Nishikanbara Formation, the Shirone Formation, and the Kurotori Formation in ascending order. Nest, the preliminary study on the history of Quaternary sedimentary environment was carried out in relation to relative sea-level change. After the latest Pliocene, the coastal line was moved northward step by step. In Echigo Plain, depositional sites composed of coastal plain-delta system deposits spread out since late Middle Pleistocene age. At Holocene age, the Echigo Plain was formed with sand dunes under rising sea level. Especially, in this study the history o … More f Quaternary sea level changes in the east-central area of the Sea of Japan, and the geological characteristics were examined as followings.1) The Quaternary sedimentary basin of the Echigo Plain was a part of the basin since middle Miocene age. It is very characteristic to deposit Quaternary marine and terrestrial sediments more than 3,500m in thickness. The depositional basin has continued since Early Miocene time. 2) The Quaternary basin was divided into uplift and subsiding areas at middle Middle Pleistocene age. The strata consist of shallow marine and fluvial deposits with many kinds of animal and plant fossils. The repeated sea level changes during Late Cenozoic were in detail recorded on the Quaternary around the Echigo Plain. 3) The basin surrounded by rising mountains and hills is a large-scaled subsiding area with growing fault zones in east and west sides. 4) Water-soluble gas and iodine included in groundwater are very useful for fuel and material resources. They are extracted from strata which are composed of bay-delta-gravelly river system deposits, but the land subsidence was caused by pomping groundwater. Less

对越后平原第四纪沉积物的地层进行了研究，并与周围地区进行了对比。特别是对平原区的地下地层进行了清晰的地层划分。建立了新的地层划分和地质时代。从上到下依次为西山组、海藏组、未命名的中更新世、神原群、埋藏阶地沉积、西山组、白根组、黑鸟组。并结合相对海平面变化对第四纪沉积环境的历史进行了初步研究。上新世晚期以后，海岸线逐步北移。在越后平原，中更新世晚期以来，海岸平原-三角洲体系沉积物组成的沉积场所不断扩展。在全新世时期，越后平原在海平面上升的情况下形成了沙丘。特别是，在这项研究中， ...更多信息 通过对日本海中东部第四纪海平面变化的研究，探讨了其地质特征：1）越后平原第四纪沉积盆地是中中新世以来该盆地的一部分。存款第四纪海洋和陆地沉积厚度超过3,500米是非常有特色的。早中新世以来，沉积盆地一直延续至今。2)第四纪盆地在中更新世中期划分为隆起区和沉降区。该地层为浅海和河流相沉积，含有多种动植物化石。晚新生代海平面的反复变化在越后平原周围的第四纪地层中有详细的记录。3)盆地为一大型沉降区，东西两侧断裂带发育。4)地下水中的水溶性气体和碘是非常有用的燃料和材料资源。它们是从海湾三角洲砾石河流系统沉积物组成的地层中开采的，但地面沉降是由地下水的涌出引起的。少

项目成果

Van Lap Nguyen, Yukihiko Kamoi and Iwao Kobayashi: "Late Pleistocene and Holocene diatom flora and of the Echigo Plain and Lake Kamo, central Japan" Proceeding of 14th International Diatom Symposium. (in printing). (1997)

Van Lap Nguyen、Yukihiko Kamoi 和 Iwao Kobayashi：“日本中部越后平原和鸭湖的晚更新世和全新世硅藻植物群”第 14 届国际硅藻研讨会论文集。

小林巌雄: "新潟県笹神周辺の地下地質" 月刊地球. 17. 735-742 (1995)

小林岩夫：“新泻县笹上地区的地下地质”地球月刊 17. 735-742 (1995)。

Van Lap Nguyen and Iwao Kobayashi: "Holocenediatom flora and sedimentary environment of the Echigo Plain, central Japan - Part1 The analysis ofFukushima-gata well core-" Sci-Rep. Niigata Univ. Ser. E (Geology). no. 11. 13-33 (1996)

Van Lap Nguyen 和 Iwao Kobayashi：“日本中部越后平原的全新烯藻区系和沉积环境 - 第 1 部分福岛口井岩心分析 -”Sci-Rep。

小林巌雄: "越後平野地下の第四系" 第四紀研究. 35. 191-205 (1996)

小林岩夫：“越后平原下的第四纪系统”第四纪研究35。191-205（1996）。

小林巌雄: "前期〜中期更新世の古日本海" 北陸地質研究所報告. No. 5. 263-285 (1996)

小林岩夫：《早至中更新世古日本海》北陆地质研究所报告第5号。263-285（1996）。