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 language | English |
|---|---|
| Pages (from-to) | 116-124 |
| Number of pages | 9 |
| Journal | Gondwana Research |
| Volume | 17 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2010 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Geology
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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 journal › Article
TY - JOUR
T1 - Retrodeformation analysis of the Quaternary fault in the southeastern Korean Peninsula
AU - Choi, Sung Ja
AU - Hong, Duk Geun
AU - Chwae, Ueechan
AU - Song, Yun Goo
AU - Kim, Changryol
AU - Shim, Taekmo
PY - 2010/1/1
Y1 - 2010/1/1
N2 - 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.
AB - 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.
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U2 - 10.1016/j.gr.2009.07.008
DO - 10.1016/j.gr.2009.07.008
M3 - Article
AN - SCOPUS:70449534670
VL - 17
SP - 116
EP - 124
JO - Gondwana Research
JF - Gondwana Research
SN - 1342-937X
IS - 1
ER -