Reactivated timings of Yangsan fault in the Northern Pohang Area, Korea

Ho Sim, Yun Goo Song, Moon Son, Changyun Park, Woohyun Choi, Chuluunbaatar Khulganakhuu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Here we present the timings of reactivated events from a fault in the northern Pohang area, which should be located at the northern-end of Yangsan fault line, the major fault in the southeastern Korean Peninsula. Recently developed illite-age-analysis (IAA) approach was employed for determining the fault-activated timing, combined with illite-polytype quantification using the optimized full-pattern-fitting (FPF) method, and K-Ar age-dating for each size fraction(<0.1 μm, 0.1-0.4 μm, and 0.4-1.0 μm) of 4 fault clay samples. Two chronological records of brittle fault-activation events were recognized at 19.6±1.86 Ma and 26.1±2.55-27.9±3.46 Ma. The ages are much younger than those of fault clays from Sangcheon-ri area (41.5∼43.5 and 50.7 Ma), the southern part of Yangsan fault line, and are close to the timing of East Sea-opening event. Further chronological analysis for additional sites of the Yangsan fault should be needed to reveal the time-scheme of the tectonic events and their spatial distributions along the fault line.

Original languageEnglish
Pages (from-to)97-104
Number of pages8
JournalEconomic and Environmental Geology
Volume50
Issue number2
DOIs
Publication statusPublished - 2017 Apr 1

Fingerprint

illite
clay
spatial distribution
tectonics
analysis
method
dating
young
sea

All Science Journal Classification (ASJC) codes

  • Environmental Science (miscellaneous)
  • Geology
  • Economic Geology

Cite this

Sim, Ho ; Song, Yun Goo ; Son, Moon ; Park, Changyun ; Choi, Woohyun ; Khulganakhuu, Chuluunbaatar. / Reactivated timings of Yangsan fault in the Northern Pohang Area, Korea. In: Economic and Environmental Geology. 2017 ; Vol. 50, No. 2. pp. 97-104.
@article{16c9a5e551554bb8874d9e250d5f8e93,
title = "Reactivated timings of Yangsan fault in the Northern Pohang Area, Korea",
abstract = "Here we present the timings of reactivated events from a fault in the northern Pohang area, which should be located at the northern-end of Yangsan fault line, the major fault in the southeastern Korean Peninsula. Recently developed illite-age-analysis (IAA) approach was employed for determining the fault-activated timing, combined with illite-polytype quantification using the optimized full-pattern-fitting (FPF) method, and K-Ar age-dating for each size fraction(<0.1 μm, 0.1-0.4 μm, and 0.4-1.0 μm) of 4 fault clay samples. Two chronological records of brittle fault-activation events were recognized at 19.6±1.86 Ma and 26.1±2.55-27.9±3.46 Ma. The ages are much younger than those of fault clays from Sangcheon-ri area (41.5∼43.5 and 50.7 Ma), the southern part of Yangsan fault line, and are close to the timing of East Sea-opening event. Further chronological analysis for additional sites of the Yangsan fault should be needed to reveal the time-scheme of the tectonic events and their spatial distributions along the fault line.",
author = "Ho Sim and Song, {Yun Goo} and Moon Son and Changyun Park and Woohyun Choi and Chuluunbaatar Khulganakhuu",
year = "2017",
month = "4",
day = "1",
doi = "10.9719/EEG.2017.50.2.97",
language = "English",
volume = "50",
pages = "97--104",
journal = "Economic and Environmental Geology",
issn = "1225-7281",
publisher = "The Korean Society of Economic and Environmental Geology",
number = "2",

}

Reactivated timings of Yangsan fault in the Northern Pohang Area, Korea. / Sim, Ho; Song, Yun Goo; Son, Moon; Park, Changyun; Choi, Woohyun; Khulganakhuu, Chuluunbaatar.

In: Economic and Environmental Geology, Vol. 50, No. 2, 01.04.2017, p. 97-104.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Reactivated timings of Yangsan fault in the Northern Pohang Area, Korea

AU - Sim, Ho

AU - Song, Yun Goo

AU - Son, Moon

AU - Park, Changyun

AU - Choi, Woohyun

AU - Khulganakhuu, Chuluunbaatar

PY - 2017/4/1

Y1 - 2017/4/1

N2 - Here we present the timings of reactivated events from a fault in the northern Pohang area, which should be located at the northern-end of Yangsan fault line, the major fault in the southeastern Korean Peninsula. Recently developed illite-age-analysis (IAA) approach was employed for determining the fault-activated timing, combined with illite-polytype quantification using the optimized full-pattern-fitting (FPF) method, and K-Ar age-dating for each size fraction(<0.1 μm, 0.1-0.4 μm, and 0.4-1.0 μm) of 4 fault clay samples. Two chronological records of brittle fault-activation events were recognized at 19.6±1.86 Ma and 26.1±2.55-27.9±3.46 Ma. The ages are much younger than those of fault clays from Sangcheon-ri area (41.5∼43.5 and 50.7 Ma), the southern part of Yangsan fault line, and are close to the timing of East Sea-opening event. Further chronological analysis for additional sites of the Yangsan fault should be needed to reveal the time-scheme of the tectonic events and their spatial distributions along the fault line.

AB - Here we present the timings of reactivated events from a fault in the northern Pohang area, which should be located at the northern-end of Yangsan fault line, the major fault in the southeastern Korean Peninsula. Recently developed illite-age-analysis (IAA) approach was employed for determining the fault-activated timing, combined with illite-polytype quantification using the optimized full-pattern-fitting (FPF) method, and K-Ar age-dating for each size fraction(<0.1 μm, 0.1-0.4 μm, and 0.4-1.0 μm) of 4 fault clay samples. Two chronological records of brittle fault-activation events were recognized at 19.6±1.86 Ma and 26.1±2.55-27.9±3.46 Ma. The ages are much younger than those of fault clays from Sangcheon-ri area (41.5∼43.5 and 50.7 Ma), the southern part of Yangsan fault line, and are close to the timing of East Sea-opening event. Further chronological analysis for additional sites of the Yangsan fault should be needed to reveal the time-scheme of the tectonic events and their spatial distributions along the fault line.

UR - http://www.scopus.com/inward/record.url?scp=85028777392&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85028777392&partnerID=8YFLogxK

U2 - 10.9719/EEG.2017.50.2.97

DO - 10.9719/EEG.2017.50.2.97

M3 - Article

VL - 50

SP - 97

EP - 104

JO - Economic and Environmental Geology

JF - Economic and Environmental Geology

SN - 1225-7281

IS - 2

ER -