+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Quaternary strike-slip crustal deformation around an active fault based on paleomagnetic analysis; a case study of the Enako Fault in central Japan

Quaternary strike-slip crustal deformation around an active fault based on paleomagnetic analysis; a case study of the Enako Fault in central Japan

Earth and Planetary Science Letters 226(3-4): 321-334

To evaluate cumulative strike-slip deformation around an active fault, we carried out tectonic geomorphic investigations of the active right-lateral strike-slip Enako fault in central Japan and paleomagnetic investigations of the Kamitakara pyroclastic flow deposit (KPFD; 0.6 Ma welded tuff) distributed around the fault. Tectonic geomorphic study revealed that the strike-slip displacement on the fault is ca. 150 m during the past 600 ka. We carried out measurements of paleomagnetic directions and anisotropy of magnetic susceptibility (AMS) within the pyroclastic flow deposit. Stable primary magnetic directions at each sampling site are well clustered and the AMS fabric is very oblate. We then applied tilt correction of paleomagnetic directions at 15 sites using tilting data obtained by the AMS property and orientations of eutaxitic structures. Within a distance of about 500 m from the fault trace, differential clockwise rotations were detected; the rotation angle is larger for zones closer to the fault. Because of this relation and absence of block boundary faults, a continuous deformation model explains the crustal deformation in the study area. The calculated minimum value of strike-slip displacement associated with this deformation detected within the shear zone is 210 m. The sum of this and offset on the Enako fault is 360 m and the slip rate is estimated at 0.6 mm/year.

(PDF emailed within 0-6 h: $19.90)

Accession: 019833769

Download citation: RISBibTeXText

DOI: 10.1016/j.epsl.2004.08.003

Related references

True strike-slip displacement accompanied by non-brittle vertical-axis deformation around an active fault revealed by paleomagnetic analysis; a case study of the Enako Fault in central Japan. Eos, Transactions, American Geophysical Union 83(47, Suppl, 2002

Estimation of total lateral displacement including strike-slip offset and broader drag deformation on an active fault; tectonic geomorphic and paleomagnetic evidence on the Tanna fault zone in; central Japan. Tectonophysics 501.1-4, 2011

Preliminary fault slip-rate estimate for the right-lateral Beng Co strike-slip fault, based on Quaternary dating of displaced paleo-lake shorelines. U. S. Geological Survey, 2010

Active strike-slip faulting and macroscopically nonrigid deformation of volcanic rocks in central Japan inferred from a paleomagnetic study. Tectonophysics 374(1-2): 81-98, 2003

Mesozoic fault systems, deformation and fault block rotation in the Andean forearc; a crustal scale strike-slip duplex in the Coastal Cordillera of northern Chile. Tectonophysics 299(1-3): 93-109, 1998

Characteristics on distribution of crustal deformation near the active fault and slip on the deep part of the fault. Report of the Coordinating Committee for Earthquake Prediction 84, 2010

Detection of aseismic slip on an inland fault by crustal movement and groundwater observations; a case study on the Yamasaki Fault, Japan. Pure and Applied Geophysics 163(4): 657-673, 2006

Detailed fault and deformation mapping along a strike-slip fault in a coastal environment; the San Gregorio Fault near Half Moon Bay, California. Geological Society of America 40.6, 2008

The movement history and fault rock evolution of a reactivated crustal-scale strike-slip fault; the Walls Boundary fault zone, Shetland. Journal of the Geological Society of London 164(5): 1037-1058, 2007

The comparison of long-term and short-term slip rates of a major active strike-slip fault system; Mosha Fault, central Alborz, Iran. Seismological Research Letters 77(2): 250, 2006

Quaternary deformation along the Wharekauhau fault system, North Island, New Zealand; implications for an unstable linkage between active strike-slip and thrust faults. Tectonics 28.6: Paper TC6008, 2009

Mechanism of brittle-plastic deformation on a large crustal strike-slip fault. Reunion Annuelle des Sciences de la Terre 7: 33, 1996

Kinematic and dynamic analysis of a low-angle strike-slip fault; the Lake Creek Fault of south-central Idaho. Journal of Structural Geology 18(5): 585-593, 1996

Tectonic rolling of intrusive lenses along strike-slip fault zones; paleomagnetic suggestions from the Romeral fault zone, Colombian Andes. Abstracts with Programs - Geological Society of America 24(7): 64, 1992

Paleomagnetic data from the Rinconada Fault in Central California; evidence for off-fault deformation and long-term creep along the San Andreas Fault. Geological Society of America 42.4, 2010