Browse > Article
http://dx.doi.org/10.9719/EEG.2019.52.5.449

K-Ar Age-dating Results of Some Major Faults in the Gyeongsang Basin: Spatio-temporal Variability of Fault Activations during the Cenozoic Era  

Song, Yungoo (Yonsei University)
Sim, Ho (Yonsei University)
Hong, Seongsik (Yonsei University)
Son, Moon (Pusan National University)
Publication Information
Economic and Environmental Geology / v.52, no.5, 2019 , pp. 449-457 More about this Journal
Abstract
We present the K-Ar age-dating results of the bulk and the less than $0.1{\mu}m$ fraction of the fault gouges collected from some major faults in the Gyeongsang basin. We try to determine the timings of fault activation based on the mineralogical characteristics, and to interpret the spatio-temporal variability of the major fault events during the Cenozoic Era by considering together with the previous results. We propose at least the 3-times of major fault events at about 50 Ma, and just after 30 Ma and 20 Ma in the Gyeongsang basin, which were inferred from the combined approach of the K-Ar ages and the clay mineralogy of the bulk fault gouges and the <$0.1{\mu}m$ fractions. The fault activation timings of the Yangsan fault tend to be younger in the northern part than in the southern part. In particular, the inferred fault events just after 30 Ma and 20 Ma are mainly detected in the Ocheon fault and the related faults, and the fault in the Gyeongju area. The fault activation timings of the major faults can be revised accurately by using illite-age-analysis(IAA) method. These geochronological determinations of the multiple events of the major faults in the Gyeongsang basin are crucial to establish the tectonic evolution in the southeastern part of the Korean Peninsula during the Cenozoic Era.
Keywords
K-Ar age; fault gouge; fault activation; illite-age-analysis(IAA); Gyeongsang basin;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
1 Son, M., Song, C.W., Kim, M.-C., Cheon, Y., Cho, H. and Sohn, Y.K. (2015) Miocene tectonic evolution of the basins and fault systems, SE Korea: dextral, simple shear during the East Sea(Sea of Japan) opening. J. Geol. Soc., v.172, p.664-680.   DOI
2 Son, M., Song, C.W., Kim, M.-C., Cheon, Y., Jung, S., Cho, H., Kim, H.-G., Kim, J.S. and Sohn, Y.K. (2013) Miocene crustal deformation, basin development, and tectonic implication in the southeastern Korean Peninsula. J. Geol. Soc. Korea, v.49, p.93-118.
3 Song, Y., Chung, D., Choi, S.-J., Kang, I.-M., Park, C., Itaya, T. and Yi, K. (2014) K-Ar illite dating to constrain multiple events in shallow crustal rocks: Implications for the Late Phanerozoic evolution of NE Asia. Journal of Asian Earth Sciences, v. 95, p.313-322.   DOI
4 Song, Y., Park, C., Sim, H., Choi, W., Son, M. and Khulganakhuu C. (2016) Reactivated Timings of Yangsan Fault in the Sangcheon-ri Area, Korea. Econ. Environ. Geol., v.49, p.97-104.   DOI
5 van der Pluijm, B.A., Hall, C.M., Vrolijk, P.J., Pevear, D.R. and Covey, M.C. (2001) The dating of shallow faults in the Earth's crust. Nature, v.412, p.172-175.   DOI
6 Bui, H.B, Ngo, X.T., Khuong, T.H., Golonka, J., Nguyen, T.D., Song, Y., Itaya, T. and Yagi, K. (2017) Episodes of brittle deformation within the Dien Bien Phu Fault zone, Vietnam: Evidence from K-Ar age dating of authigenic illite. Tectonophysics, v.695, p.53-63.   DOI
7 Choi, J.-H., Yang, S.-J. and Kim, Y.-S. (2009) Fault zone classification and structural characteristics of the southern Yangsan fault in the Sangcheon-ri area, SE Korea. Journal of the Geological Society of Korea, v.45, p.9-28.
8 Chung, D., Song, Y., Kang, I.-M. and Park, C.-Y. (2013) Optimization of Illite Polytype Quantification Method. Economic and Environmental Geology, v.46, p.1-9(in Korean with English abstract).   DOI
9 Chung, D., Song, Y., Park, C.-Y., Kang, I.-M., Choi, S.-J. and Khulganakhuu, C. (2014) Reactivated Timings of Some Major Faults in the Chugaryeong Fault Zone since the Cretaceous Period. Economic and Environmental Geology, v.47, p.29-38(in Korean with English abstract).   DOI
10 Grathoff, G.H. and Moore, D.M. (1996) Illite polytype quantification using Wildfire calculated X-ray diffraction patterns. Clays and Clay Minerals, v.44, p.835-842.   DOI
11 Itaya, T., Nagao, K., Inoue, K., Honjou, Y., Okada, T. and Ogata, A. (1991) Argon isotopic analysis by newly developed mass spectrometric system for K-Ar dating. Mineralogical Journal, v.15, 203-221.   DOI
12 Kyung, J.B. and Lee, K.H. (2006) Active fault study of the Yangsan fault system and Ulsan fault system, southeastern part of the Korean Peninsula. Journal of the Korean Geophysical Society, v.9, p.219-230.
13 Khulganakhuu C., Song, Y., Chung, D., Park, C., Choi, S.J., Kang, I.-M. and Yi, K. (2015) Reactivated Timings of Inje Fault since the Mesozoic Era. Economic and Environmental Geology, v.48, p.41-49(in Korean with English abstract).   DOI
14 KIGAM (2018) Active fault map and seismic hazard map. KIGAM report (NEMA-자연-2009-24) funded by Ministry of the Interior and Safety (2012), published by Jinhan M & B, Seoul, 899p.
15 Kim, Y.H. and Lee, K.H. (1987) A study on the structure of Yangsan fault in the southern part of Kyeonju. Journal of the Korean Institute of mineral and mining engineers, v.20, p.247-260.
16 Lee, K.H. and Na, S.H. (1983) A study of microearthquake activity of the Yangsan fault. Journal of the Geological Society of Korea. v.19, p.127-135.
17 Lee, K.H., Jeong, B.G., Kim, Y.H. and Yang, S.J. (1984) A geophysical study of Yangsan fault area. Journal of the Geophysical Society of Korea. v.20, p.222-240.
18 Lee, K.H., Lee, K.H., Jeong, B.G. and Kim, Y.H. (1985) A geophysical study of Yangsan fault area(II). Journal of the Geophysical Society of Korea. v.21, p.79-89.
19 Pevear, D.R. (1992) Illite age analysis, a new tool for basin thermal history analysis. In: Kharaka, Y.K. and Maest, A.S. (eds.) Water-Rock interaction. Balkema, Rotterdam, p.1251-1254.
20 Pevear, D.R. (1999) Illite and hydrocarbon exploration. Proceedings of the National Academy of Sciences of the United States of America, v.96, no.7, p.3440-3446.   DOI
21 Sim, H., Song, Y., Son, M., Park, C., Choi, W. and Khulganakhuu, C. (2017) Reactivated Timings of Yangsan Fault in the Northern Pohang Area, Korea. Econ. Environ. Geol., v.50, p.97-104.   DOI