Study on paleoenvironment during the Last Glacial in the Tokachi Plain and Hidaka Range

十胜平原和日高山脉末次冰期古环境研究

• 批准号: 10680095
• 负责人: HIRAKAWA Kazuomi
• 金额: $ 2.11万
• 依托单位: HOKKAIDO UNVERSITY
• 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-10680095/
• 关键词: Hidaka Mountains; Tokachi Plain; Permafrost; Tephra; Glaciation; 水分環境; 古水文環境

1. On the basis of tephrochronology, sedimentation and downcutting by rivers are examined in some rivers of Tokachi Plain and Hidaka Mountains, particularly for the Oxygen Isotope Stage 5〜3.2. Eolian dust had been produced and transported from the bare ground of Hidaka Mountains to Tokachi Plain during the Last Glacial, indicating the tundra environment of the Mountains.3. Paleohydrological study of fluvial gravels reveals that the discharge of rivers during the Last Glacial should have been almost same as that of at present. This result indicates that a sedimentation during the Last Glacial had been resulted from the abundant supply of load.4. Mountain permafrost was examined by the indicative landform of rockglacier and the present climatic condition obtained from own observation. Permafrost is possibly distributed at present in the summit area of the Hidaka Mountains around Mt. Poroshiri.5. Fossil periglacial phenomena in the Tokachi plain was examined with special reference to permafrost condition of the Last Glacial. Past climate was examined in relation to summer temperature.

1.根据火山灰年代学，对十胜平原和日高山脉的部分河流进行了沉积和下切作用的研究，特别是对氧同位素阶段5 ~ 3.2的研究。末次冰期时，日高山裸露地表产生了风尘，并向十胜平原搬运，反映了该地区的冻土环境.河流砾石的古水文研究表明，末次冰期河流的流量应与现在的流量基本相同。这一结果表明，末次冰期的沉积作用是由大量的负荷供给造成的。根据自身观测得到的冰川指示地貌和现今气候条件，对山地多年冻土进行了研究。目前在日高山周围的日高山顶地区可能分布有多年冻土。波罗希里。5.对十胜平原的冰缘化石现象进行了研究，特别是对末次冰期的永久冻土条件进行了研究。过去的气候与夏季气温的关系进行了研究。

项目成果

NAKAMURA. Y., HIRAKAWA, K., IWASAKI, S., SAWAGAKI, T.: "Late Quaternary tephras in the Tokachi Plain and the Hidaka Range, with special reference to glacial sediments"The Quaternary Res.. 39. 33-44 (2000)

中村。

IWASAKI, S., HIRAKAWA, K., SAWAGAKI, T.: "Late Quaternary glaciation and chronology in the Tottabetsu valley, Hidaka Range"Geogra. Rev., Japan. 73A. 598-522 (2000)

IWASAKI, S.、HIRAKAWA, K.、SAWAGAKI, T.：“日高山脉 Tottabetsu 山谷的晚第四纪冰川作用和年代学”Geogra。

岩崎正吾、平川一臣、沢柿教伸: "日高山脈エサオマントッタベツ川流域における第四紀後期の氷河作用とその編年"地学雑誌. 109. 37-55 (2000)

Shogo Iwasaki、Kazuomi Hirakawa、Norinobu Sawagaki：“日高山 Esaomantottabetsu 河流域的晚第四纪冰川作用及其​​年代”地质杂志 109. 37-55 (2000)。

中村勇吾、平川一臣、岩崎正吾、沢柿教伸: "十勝平野および日高山脈におけるテフラ、とくに氷河堆積物中のテフラの同定"第四紀研究. 39. 33-44 (2000)

Yugo Nakamura、Kazuomi Hirakawa、Shogo Iwasaki、Norinobu Sawagaki：“十胜平原和日高山脉中的火山灰鉴定，特别是冰川沉积物”第四纪研究 39. 33-44 (2000)。

岩崎正吾・平川一臣: "日高山脈北部,トッタベツ川水系における最終氷期以前の氷河作用と火山灰層序" 日本地理学会講演要旨集. 53. 106-107 (1998)

Shogo Iwasaki 和 Kazuomi Hirakawa：“日高山脉北部 Tottabetsu 河系最后一个冰河时代之前的冰川和火山灰地层”日本地理学会会议记录 53. 106-107 (1998)。