Download Auxiliary Materials for MS# 2013GL055809 Active blind thrusts

Auxiliary Materials for MS# 2013GL055809
Active blind thrusts beneath the Tokyo metropolitan area: Seismic hazards and
inversion tectonics
Tatsuya Ishiyama*+, Hiroshi Sato*, Naoko Kato*,
Toshio Nakayama*, Susumu Abe#
(*Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku,
Tokyo 113-0032, Japan
# JGI Inc., 1-5-21 Otsuka, Tokyo 112-0012, Japan)
Corresponding Author + [email protected]
Geophysical Research Letters, 2013
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In addition to the manuscript itself, we provide supplemental figures S1 to S3 and
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tables S1 and S2 for making it more readable.
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Figure Captions
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2013GL055809fs01.eps
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Figure S1.
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the Kanto area (modified from Geological Society of Japan, Eds., 2008).
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Paleomagnetic polarity timescale is modified from Cande and Kent [1995].
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Stratigraphic columns of Neogene sedimentary basin deposits in
Oxgen isotope record is modified from Shackleton [1995].
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2013GL055809fs02a.tif
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Figure S2(a).
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magenta line in Figure 1, showing reactivated normal faults and normal
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fault-related grabens. No vertical exaggeration. Red lines indicate fault
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trajectories that deform at least middle Pleistocene units, and blue lines are
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inactive faults.
Interpreted deep seismic reflection profile Line A, marked by a
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2013GL055809fs02b.eps
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Figure S2(b).
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normal faults since the early Pleistocene, created by retro-deforming the
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interpreted geologic section in Figure S2a.
Area-balanced geologic cross section before reactivation of
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2013GL055809fs02c.eps
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Figure S2(c).
P-wave velocity structure along the Line A based on refraction
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analysis using simultaneously obtained shot records with repeated shooting of
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Vibroseis trucks.
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2013GL055809fs03a.eps
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Figure S3(a). Geologic map of the fold scarp above the Ayasegawa fault that
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deforms the last interglacial marine and fluvial terrace deposits, with the
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locations of the high-resolution seismic line and shallow boreholes used in this
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study (modified from Ishiyama et al., 2005). The location of the deep seismic
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reflection profile in Figures 2 and S2 is also shown.
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2013GL055809fs03b.eps
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Figure S3(b). Detailed geomorphology of folded terraces, locations of the
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seismic line and drilled boreholes in this study are shown.
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Table Captions
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2013GL055809ts01.eps
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Table S1.
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reflection profile Line A [Sato et al., 2006].
Parameters for data acquisition and processing of the deep seismic
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2013GL055809ts02.eps
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Table S2.
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high-resolution seismic profiles across the base of the forelimb above the
Parameters for data acquisition and processing of the
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Ayasegawa fault [Ishiyama et al., 2005].
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References
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Cande, S. C., and D. V. Kent (1995), Revised calibration of the geomagnetic
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polarity timescale for the Late Cretaceous and Cenozoic, J. Geophys. Res.,
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100(B4), 6093–6095, doi:10.1029/94JB03098.
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Geological Society of Japan (Eds.) (2008), Geology of Kanto area, 570 pp.,
Asakura Publishing, Tokyo.
Ishiyama, T., K. Mizuno, Y. Sugiyama, T. Sugai, H. Nakazato, S. Hachinohe, M.
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Suehiro, and T. Hosoya (2005), New evidence of active folding of the
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northern Ayasegawa fault, constrained by tectonic geomorphology, borehole
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stratigraphy, and seismic reflection data (in Japanese with English abstracts),
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Annual Report on Active Fault and Paleoearthquake Research, 5, 29-37.
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Sato, H., N. Hirata, T. Iwasaki, K. Koketsu, K. Ito, T. Ito, K. Kasahara, and N.
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Kato (2006), Seismic Reflection Profiling in the Kanto Metropolitan
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Area (2006 northern Kanto and Omiya-Noda lines), Annual report on
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the Special Project for Earthquake Disaster Mitigation in Urban areas
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(in Japanese), 233-238.
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Shackleton, N. J. (1995), New data on the evolution of Pliocene climate
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variability, in Paleoclimate and Evolution, with emphasis on human origins,
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edited by E. S. Vrba, G. H. Denton, T. C. Partridge, and L. H. Burkle, pp.
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242-248, Yale University Press, New Haven.