A study of a large earthquake in Taiwan collision zone
台湾碰撞带大地震研究
基本信息
- 批准号:12373001
- 负责人:
- 金额:$ 17.24万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (A)
- 财政年份:2000
- 资助国家:日本
- 起止时间:2000 至 2002
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
(1) Earthquake observation : We deployed 60 3-component seismographs along a 150-km-long line in central part of Taiwan to observe natural earthquakes. We observed local, regional and teleseismic events. The data show large-scale deformation of the crust, which might be controlled by the collision tectonics in Taiwan. A highly active seismic activity was detected in central part of Taiwan even two year has passed since the 1999 Chi-Chi earthquake.(2) GPS observation : We analyzed a single frequency GPS data to improve accuracy.(3) Geomorphology : We conducted a filed survey, analysis of air-bone photos and 1 : 2,500 geologic maps to evaluate quantitatively the present-day tectonic processes that are acting in the Taiwan. We found an active fold that runs parallel to the Chelungpu fault.(4) Control source seismology : We conducted a 15-km-long reflection survey in central part of Taiwan. We detonated two 50-kg dynamite shot. We imaged a deep crust and a deeper extension of the Chelungpu fault.(5) Geological survey : From the northern borehole of the Chelungpu fault, thin layers of very soft fault clay were found, while pseudotachylyte was found form the southern borehole. The degree of melting of the southern layer is very low, suggesting that high viscosity of the melt is likely to have restrained the smooth slip.(6) Tectonics : The reason why there is a difference in the interplate seismic activity in collision zones are studied from a viewpoint dehydration from the subducted slab.
(1)地震观测:我们在台湾中部150公里长的线路上部署了60个三分量地震仪,以观测天然地震。我们观察了当地、区域和远震事件。这些资料显示台湾地壳有大规模的变形,可能是受碰撞构造所控制。1999年集集地震发生至今已两年,台湾中部地区仍有强烈的地震活动。(2)GPS观测:我们分析了单频GPS数据,以提高精度。(3)地貌:我们进行了野外调查,分析航空照片和1:2,500地质图,以定量评估现代构造作用在台湾。我们发现了一个平行于车笼埔断层的活动褶皱。(4)控制源地震学:我们在台湾中部进行了15公里长的反射测量。我们引爆了两枚50公斤的炸药。我们拍摄了一个地壳深部和车笼埔断层更深的延伸。(5)地质调查:在车笼埔断层北方钻孔中,发现了薄层的非常软的断层粘土,而在南方钻孔中发现了假玄武玻璃。南部层的熔融程度非常低,这表明熔体的高粘度可能抑制了平滑滑动。(6)构造学:从俯冲板片脱水的角度分析了碰撞带板间地震活动差异的原因。
项目成果
期刊论文数量(30)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Hirata, N.: "Aftershock Observation of the 1999 Chi-Chi, Taiwan Earthquake"Bull. Earthq. Res. Inst. Univ.Tokyo. 57. 33-46 (2000)
Hirata, N.:“1999 年台湾集集地震余震观测”公牛。
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- 影响因子:0
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- 通讯作者:
平田直: "内陸地震予知戦略"自然災害科学. 119・4. 409-412 (2001)
平田直志:“内陆地震预测策略”自然灾害科学119・412(2001)。
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Nagai, S., S.Sakai, N.Hirata: "Aftershock distribution of the 1999 Chi-Chi, Taiwan, Earthquake by the temporary seismic observation"Geophys.Res.Letters. (In press). 2003 GL017466 (2003)
Nagai, S., S.Sakai, N.Hirata:“临时地震观测对1999年台湾集集地震的余震分布”Geophys.Res.Letters。
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- 影响因子:0
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Nakanishi, A., N.Takahashi, J.0.Park, S.Miura, S.Kodaira, Y.Kaneda, N.Hirata, T.Iwasaki, M.Nakamura: "Crustal structure across the coseismic rupture zone of the 1944 Tonankai earthquake, the central Nankai trough seismogenic zone"Journal of Geophysical Re
Nakanishi, A.、N.Takahashi、J.0.Park、S.Miura、S.Kodaira、Y.Kaneda、N.Hirata、T.Iwasaki、M.Nakamura:“1944 年同震破裂带的地壳结构
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- 影响因子:0
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佐藤比呂志, 伊藤谷生, 池田安隆, 平田直, 今泉俊文, 井川猛: "震源断層-活断層システムのイメージングの意義と現状"地学雑誌. 110・6. 838-848 (2001)
Hiroshi Sato、Tanio Ito、Yasutaka Ikeda、Nao Hirata、Toshifumi Imaizumi、Takeshi Ikawa:“震源断层-活动断层系统成像的意义和现状”地球科学杂志110・6(2001)。
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{{ truncateString('HIRATA Naoshi', 18)}}的其他基金
Integrated seismic exploration in the collision plate boundary of Taiwan
台湾碰撞板块边界综合地震勘探
- 批准号:
15253003 - 财政年份:2003
- 资助金额:
$ 17.24万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Implication of researches on prediction of earthquake and volcano eruptions to disaster prevention research
地震、火山喷发预测研究对防灾研究的意义
- 批准号:
12800007 - 财政年份:2000
- 资助金额:
$ 17.24万 - 项目类别:
Grant-in-Aid for Special Purposes
A scanning method of detecting an earthquake
一种探测地震的扫描方法
- 批准号:
10640400 - 财政年份:1998
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$ 17.24万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
DEVELOPMENT OF NORTHERN FOSSA MAGNA AND ACTIVE TECTONICS
北大颅窝的发育和活动构造
- 批准号:
08404025 - 财政年份:1995
- 资助金额:
$ 17.24万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
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