Structure and Composition of the Plate-Boundary Slip Zone for the 2011 Tohoku-Oki Earthquake

被引：200

作者：

Chester, Frederick M. ^{[1
]}

Rowe, Christie ^{[2
]}

Ujiie, Kohtaro ^{[3
,4
]}

Kirkpatrick, James ^{[5
]}

Regalla, Christine ^{[6
]}

Remitti, Francesca ^{[7
]}

Moore, J. Casey ^{[8
]}

Toy, Virginia ^{[9
]}

Wolfson-Schwehr, Monica ^{[10
]}

Bose, Santanu ^{[11
]}

Kameda, Jun ^{[12
]}

Mori, James J. ^{[13
]}

Brodsky, Emily E. ^{[8
]}

Eguchi, Nobuhisa ^{[14
]}

Toczko, Sean ^{[14
]}

机构：

[1] Texas A&M Univ, Dept Geol & Geophys, Ctr Tectonophys, College Stn, TX 77843 USA

[2] McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ, Canada

[3] Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki, Japan

[4] Japan Agcy Marine Earth Sci & Technol, Inst Res Earth Evolut, Yokosuka, Kanagawa 2370061, Japan

[5] Colorado State Univ, Dept Geosci, Ft Collins, CO 80523 USA

[6] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA

[7] Univ Modena & Reggio Emilia Largo, Dipartimento Sci Terra, Modena, Italy

[8] Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA

[9] Univ Otago, Dept Geol, Dunedin, New Zealand

[10] Univ New Hampshire, Ctr Coastal & Ocean Mapping, Joint Hydrog Ctr, Durham, NH 03824 USA

[11] Univ Calcutta, Dept Geol, Kolkata, India

[12] Univ Tokyo, Dept Earth & Planetary Sci, Tokyo, Japan

[13] Kyoto Univ, Disaster Prevent Res Inst, Earthquake Hazards Div, Kyoto, Japan

[14] Japan Agcy Marine Earth Sci & Technol, Ctr Deep Earth Explorat, Yokohama, Kanagawa, Japan

来源：

SCIENCE | 2013年 / 342卷 / 6163期

关键词：

PACIFIC COAST; TRENCH AXIS; FAULT; STRESS; DECOLLEMENT; THICKNESS; FRICTION; RUPTURE; JAPAN; AREA;

D O I：

10.1126/science.1243719

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The mechanics of great subduction earthquakes are influenced by the frictional properties, structure, and composition of the plate-boundary fault. We present observations of the structure and composition of the shallow source fault of the 2011 Tohoku-Oki earthquake and tsunami from boreholes drilled by the Integrated Ocean Drilling Program Expedition 343 and 343T. Logging-while-drilling and core-sample observations show a single major plate-boundary fault accommodated the large slip of the Tohoku-Oki earthquake rupture, as well as nearly all the cumulative interplate motion at the drill site. The localization of deformation onto a limited thickness (less than 5 meters) of pelagic clay is the defining characteristic of the shallow earthquake fault, suggesting that the pelagic clay may be a regionally important control on tsunamigenic earthquakes.

引用

页码：1208 / 1211

页数：4

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