Paleocenographic study of piston cores collected from the Ryukyu Trench slope

琉球海沟斜坡采集的活塞芯的古生代研究

• 批准号: 02640603
• 负责人: UJIIE Hiroshi
• 金额: $ 1.47万
• 依托单位: Department of Marine Sciences, College of Science, University of the R Trench slope Paleoceanographic study of piston cores collected from the Ryukyu
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02640603/
• 关键词: Ryukyu Trench slope; piston core; paleoceanography; late Quaternary; stable oxygen isotope; source region of the Kuroshino Current; 黒潮源流域; 海水懸濁度変化; 海溝斜面; 酸素同位体比; 酸素安定同位体比; ナンノプランクトン; 太陽輻射量変化

Late Quaternary paleooceanography around the Ryukyu Island Arc is studied depending on 22 piston cores. Particularly, the cores from the southern Ryukyu Trench slope contain continuous informations on the oceanographic changes for the past ca. 320,000 years at the maximum. Synthetic study (included stable planktonic oxygen isotope, calcareous nannoplankton, planktonic foraminiferal, sedimentologic, and tephrochronologic stratigraphies) of these cores reveals many new facts concerning the paleoceanographic changes of the Ryukyu Island Arc region, i. e. source region of the Kuroshio Current. For the details, our papers published or in press on the international journals are to be referred.

对琉球岛弧周围晚第四纪古海洋学进行了研究，采集了22个活塞芯。特别是，琉球海沟南部斜坡的岩心包含了过去最大约32万年来海洋变化的连续信息。对这些岩心的综合研究(包括稳定的浮游氧同位素、钙质超微浮游动物、浮游有孔虫、沉积学和年代学地层学)揭示了琉球岛弧地区即黑潮源区古海洋变化的许多新事实。有关详情，请参阅我们在国际期刊上发表或出版的论文。

项目成果

Yamamoto,S.: "Dissolution of turbidite and hemipelagic marine carbonates in trench basin of the western North Pacific." Carbonates&Evaporites. 5. 13-22 (1991)

Yamamoto,S.：“北太平洋西部海沟盆地浊积岩和半远洋海相碳酸盐的溶解。”

Ahagon,N.,Y.Tanaka and H.Ujiie:"Florisphaera profunda,a possible nannoplankton indicator of late Quaternary changes in sea-water turbidity at the northwestern margin of the Pacific." Marine Micropaleontology. (1993)

Ahagon, N., Y. Tanaka 和 H. Ujiie：“Florisphaera profunda，可能是太平洋西北边缘第四纪晚期海水浊度变化的超微浮游生物指标。”

Ujiie, H., T. Nakamura and T. Oyakawa: "Holocene turbidite cores suggesting periodical spreading of the southern Okinawa Trough, a back-arc basin at the northwestern margin of the Pacific." Marine Geology, in press. (1993)

Ujiie, H.、T. Nakamura 和 T. Oyakawa：“全新世浊积岩核心表明冲绳海槽南部周期性扩张，冲绳海槽是太平洋西北边缘的弧后盆地。”

氏家 宏(編): "沖縄の自然ー地形と地質" ひるぎ社, 271 (1990)

Hiroshi Ujiie（编辑）：“冲绳的自然 - 地形和地质” Hirugisha，271（1990）

Ujiie,H.,and Y.Nishimura: "Transect of the central and southern Ryukyu Island Arc." 25th International Geological Congress,Field Trip Guide. 5. 337-361 (1992)

Ujiie，H.和Y.Nishimura：“琉球岛弧中部和南部的横断面”。