Retrodeformation analysis of the Quaternary fault in the southeastern Korean Peninsula

Sung Ja Choi, Duk Geun Hong, Ueechan Chwae, Yun Goo Song, Changryol Kim, Taekmo Shim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The Suryum fault (F1) with subsidiary branches (F2, 3) varies in strike from N40°E to N14°E and in dip from < 68 to 8°SE with respect to the surface. New evidence helps redefine the frequency of faulting events and allows calculation of net slip rates. A retrodeformation analysis based on stratigraphic correlation and optical stimulated luminescence (OSL) dates of colluvial deposits reveals four events including three-time faulting during the latest Pleistocene: reverse → landslide → reverse → normal. Net slips are in the range of 100-130 cm for F1 at a dip angle of 68°-45° and 84 cm for F2 at a dip angle of 45°. Based on OSL ages of 23,000 ± 1200 yr and 12,000 ± 2000 yr, we calculate net slip rates for F1 and F2 ranging from 0.03 to 0.08 mm/yr. The reactivation slip rate on F1 is 0.15-0.4 mm/yr over the last 12,000 ± 2000-2800 ± 200 yr. The Suryum reverse faulting might be related to Mw ∼ 6-7 earthquakes during the late Pleistocene, based on net slip rates comparable to those of other intraplate regime examples.

Original languageEnglish
Pages (from-to)116-124
Number of pages9
JournalGondwana Research
Volume17
Issue number1
DOIs
Publication statusPublished - 2010 Jan 1

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slip rate
dip
faulting
luminescence
Pleistocene
colluvial deposit
stratigraphic correlation
reactivation
landslide
earthquake
analysis

All Science Journal Classification (ASJC) codes

  • Geology

Cite this

Choi, Sung Ja ; Hong, Duk Geun ; Chwae, Ueechan ; Song, Yun Goo ; Kim, Changryol ; Shim, Taekmo. / Retrodeformation analysis of the Quaternary fault in the southeastern Korean Peninsula. In: Gondwana Research. 2010 ; Vol. 17, No. 1. pp. 116-124.
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Retrodeformation analysis of the Quaternary fault in the southeastern Korean Peninsula. / Choi, Sung Ja; Hong, Duk Geun; Chwae, Ueechan; Song, Yun Goo; Kim, Changryol; Shim, Taekmo.

In: Gondwana Research, Vol. 17, No. 1, 01.01.2010, p. 116-124.

Research output: Contribution to journalArticle

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