Repeated mechanism of large earthquake-formation mechanism of large scale pseudotachylytes
大尺度拟速岩大地震形成机制的重复机制
基本信息
- 批准号:14403009
- 负责人:
- 金额:$ 8万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2002
- 资助国家:日本
- 起止时间:2002 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Main results obtained in this project are as follows.1.Multiple generations of voluminous cataclaiste, mylonite, cataclasite-and mylonite-related pseudotachylytes are found in the Woodroffe thrust, central Australia and ultrahigh pressure metamorphic complex in Diabe-Tonbei region, central China. The co-existence of these fault rocks indicates that the pseudotachylytes represent a large number of large earthquakes and accompanying seismic slip over an extended period of seismicity on these two faults. The timing and distribution of pseudotachylyte shows that the earthquakes nucleated at the base of the brittle-dominated seismogenic zone and propagated down through the brittle-ductile transition into the ductile-dominated regime of the crust.2.Crushing-originated pseudotachylytes are found from the Simotsuburai fault of the Itoigawa-Shizuoka tectonic Line active fault system, central Japan.3.The surface rupture of the 1999 Mw 7.6 Chi-Chi (Taiwan) warthquake was controlled primary by the pre-existing Chenlungpu fault zone, which is distributed in a wide zone of upto 60 m, although the main co-seismic slip is located in a narrow zone of <0.3 cm. The structural analyses of the shear zone and fault rocks found in the Chenlungpu fault show that the Chenlungpu fault has slipped as a thrust fault with a significant left-lateral slip component since its formation in the Pleistocene.4.The magnitude (Ms) 8.1 Central Kunlun earthquake occurred on 14 Novermber 2001, in the central Kunlun mountain area, north Tibet. Our studies reveal 1) that the co-seismic rupturing over a distance of 〜420 km along the pre-existing Kunlun fault zone ; 2) the co-seismic surface rupture was dominated by strike-slip faulting with a large left-lateral displacement up to 16.3 m ; 3) extensive co-seismic mole track structures are developed along the co-seismic rupture zone.
本课题取得的主要成果如下:1.在澳大利亚中部Woodroffe逆冲断层和中国中部Diabe-Tonbei地区超高压变质杂岩中发现了多代大量的碎裂岩、糜棱岩、碎裂岩和糜棱岩相关的假速晶岩。这些断层岩的共存表明,假速岩代表了这两个断层上长时间地震活动期间的大量大地震和伴随的地震滑移。假速石的时间和分布表明,地震在脆性主导的发震带底部成核,并通过脆性-韧性转变向下传播到地壳的韧性主导区域。 2.破碎起源的假速石发现于糸鱼川-静冈构造线活动断裂系的西莫茨布里断层,中部 日本.3. 1999年Mw 7.6 Chi-Chi(台湾)地震的地表破裂主要受先存的陈龙堡断裂带控制,该断裂带分布在长达60 m的宽阔地带,但主要同震滑移位于<0.3 cm的狭窄地带。对陈龙堡断裂剪切带和断层岩石的结构分析表明,陈龙堡断裂自更新世形成以来,一直为逆冲断层滑动,具有明显的左旋滑移成分。 4、2001年11月14日,藏北中昆仑山区发生里氏8.1级中昆仑地震。我们的研究表明:1)沿先存昆仑断裂带发生了约420公里的同震破裂; 2)同震地表破裂以走滑断层为主,左旋位移较大,达16.3 m; 3)沿同震破裂带发育广泛的同震痣轨结构。
项目成果
期刊论文数量(100)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Repeated coseismic infiltration of meteoric and seawater into deep fault zones: a case study of the Nojima fault zone, Japan
- DOI:10.1016/j.chemgeo.2003.08.010
- 发表时间:2003-12
- 期刊:
- 影响因子:3.9
- 作者:A. Lin;N. Tanaka;S. Uda;M. Satish-Kumar
- 通讯作者:A. Lin;N. Tanaka;S. Uda;M. Satish-Kumar
Propagation of seismic slip from brittle to ductile crust: Evidence from pseudotachylyte of the Woodroffe thrust, central Australia
- DOI:10.1016/j.tecto.2004.10.016
- 发表时间:2005-06
- 期刊:
- 影响因子:2.9
- 作者:A. Lin;T. Maruyama;Stallard Aaron;K. Michibayashi;A. Camacho;Ken‐ichi Kano
- 通讯作者:A. Lin;T. Maruyama;Stallard Aaron;K. Michibayashi;A. Camacho;Ken‐ichi Kano
Aiming Lin, Zhiming Sun, Zhenyu Yang: "Multiple generations of pseudotachylytes in the brittle to ductile regimes, Qinglin-Dabie Shan ultrahigh-pressure metamorphic complex, Central"The Island Arc. 12. 423-435 (2003)
林爱明,孙志明,杨振宇:“脆性到韧性区域的多代假速岩,青林-大别山超高压变质杂岩,中央”岛弧。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
林 愛明: "2001年昆崙山中部Ms8.1地震の地震断層と震源過程"月刊地球. 号外43. 46-49 (2004)
林爱梅:“2001年昆仑中Ms8.1地震的地震断层和震源过程”地球月刊特刊43. 46-49 (2004)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Shear sense inversion of the strike-slip active faults in the southwestern Japan, inferred from offsets of topographic features and fault fabrics
从地形特征和断层组构偏移推断日本西南部走滑活动断层的剪切感反演
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:Maruyama T.;Lin A.
- 通讯作者:Lin A.
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LIN Aiming其他文献
LIN Aiming的其他文献
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{{ truncateString('LIN Aiming', 18)}}的其他基金
Segmentation and fault interactction of intracontinental active faults: an example from the Tibetan Plateau
陆内活动断层的分段与断层相互作用:以青藏高原为例
- 批准号:
23253002 - 财政年份:2011
- 资助金额:
$ 8万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Frictional melting process and deformation mechanism of seismogenic fault in the shallow-deep crust
浅深地壳发震断裂摩擦熔融过程及变形机制
- 批准号:
18340158 - 财政年份:2006
- 资助金额:
$ 8万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Formation mechanism of fault rocks in ductile-brittle regime
韧脆态断层岩的形成机制
- 批准号:
12440138 - 财政年份:2000
- 资助金额:
$ 8万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
TECTONIC HISTORY OF THE ROKKO-AWAJI ACTIVE FAULT ZONE (THE SEISMIC SOURCE FAULT OF THE 1995 SOUTHERN HYOGO PREFECTURE EARTHQUAKE)
六甲淡路活动断裂带(1995年兵库县南部地震震源断层)的构造历史
- 批准号:
09640544 - 财政年份:1997
- 资助金额:
$ 8万 - 项目类别:
Grant-in-Aid for Scientific Research (C)