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Taiwan Chelungpu-fault Drilling Project

 

Description

Chelungpu Fault, broken DamThe 1999 Chi-Chi, Taiwan earthquake (Mw7.7) produced spectacular surface faulting with vertical displacements of up to 8 m on the Chelungpu fault. The rupture behavior of this earthquake was well recorded by the Taiwan Strong Motion recorders, teleseismic data, and GPS-measurements. To understand the earthquake rupture process, one of the main issues is the level of stress on the fault before, during, and after the earthquake. The energy balance between the tectonic stress, dynamic friction, radiated energy, and heat dissipation controls the character of the dynamic rupture. There are many hypotheses for how a fault loses strength during sliding, including slip weakening, dilatational slip pulses, thermal pressurization, mechanical lubrication, and melting to name a few. Physical data is critical needed to make progress in understanding how large earthquakes occur.
The proposal for Taiwan Chelungpu-fault Drilling Project (TCDP) is to obtain a physical sample of the fault where large displacements occurred during the Chi-Chi earthquake, to measure the physical properties and mechanical behavior of the rocks above and below the fault zone and to thoroughly document the state of stress that exists in these rocks following such a large slip event.

(Photo ©:Ronald Conze OSG/ICDP)


 

Location

Asia, Taiwan, Taichung County, near by DaKeng

 

Coordinates

24° 11' 54.35'' N, 120° 45' 8.0'' E (Please scroll down to end of page for more information.)

 

Programs and Funding

 

Principal Investigators
  • Kuofong Ma, National Central University of Taiwan, Department of Earth Sciences, Institute of Geophysics
  • Yiben Tsai, National Central University of Taiwan, Department of Earth Sciences, Institute of Geophysics
  • Mark D. Zoback, Stanford University, School of Earth Sciences, Department of Geophysics
  • Stephen Hoyt Hickman, U.S. Geological Survey at Menlo Park, Earthquake Hazards Program, Northern California
  • Hisao Ito, Japan Agency for Marine-Earth Science and Technology Center, Center for Deep Earth Exploration
  • Wonn (Azuma) Soh (Wataru), Japan Agency for Marine-Earth Science and Technology Center

 

Cooperating Principal Investigators
  • Jihhao Hung, National Central University of Taiwan, Department of Earth Sciences, Institute of Geophysics
  • Shengrong Song, National Taiwan University, Department of Geosciences
  • Chienying Wang, National Central University of Taiwan, Department of Earth Sciences, Institute of Geophysics

 

Partners and Contractors

 

Keywords

Active Fault Zones, Chelungpu Fault, Collision Zones, Convergent Margins, Earthquake Physics, Fault Lubrication, Fault Mechanics, Fault Properties, ICDP-2003/06, Taiwan, TCDP

 

Current State

Completed

 

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