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Age and Structural Origin of the Tertiary Churyeong Breccia in the Gyeongju City, Korea  

Son, Moon (Department of Geological Sciences, Pusan National University)
Kim, Seung-Hyun (Korea Institute of Construction Technology)
Kim, Jong-Sun (Department of Geological Sciences, Pusan National University)
Song, Cheol-Woo (Department of Geological Sciences, Pusan National University)
Kim, In-Soo (Department of Geological Sciences, Pusan National University)
Publication Information
The Journal of the Petrological Society of Korea / v.18, no.2, 2009 , pp. 137-151 More about this Journal
Abstract
Synthetic analyses of field data, including rock facies, contact relationships, petrography, structural elements, and etc., and previous geochemical and absolute age data of the Tertiary Churyeong Breccia and its surrounding volcanics in the Gyeongju city, Korea, have led to the following results. (1) The Tertiary rocks are divided into the dacitic tuffs, Churyeong Breccia, and andesitic rocks in ascending order. The dacitic tuffs are unconformably overlain by the Churyeong Breccia which is intruded by or conformably overlain by the andesitic rocks. (2) The dacitic tuffs are correlated with the Paleocene${\sim}$Eocene Wangsan dacitic volcanics, while the Churyeong Breccia and andesitic rocks are correlated with the early Early Miocene Andongri Formation and Yongdongri Tuffs in the Waeup Basin, respectively. (3) The Churyeong Breccia accumulated rapidly in the NE-trending graben about 1.5 km in width during the crustal extension in the NW-SE direction due to the East Sea opening. (4) Dacitic${\sim}$andesitic volcanism and crustal extension were active during the early Early Miocene times in SE Korean peninsula. During the deposition the Churyeong Breccia, especially, the volcanism ceased for some time, but the active normal faulting led to the formation of grabens in places.
Keywords
Tertiary; Churyeong Breccia; correlation; graben; absolute age;
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Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 김인수, 1992, 새로운 동해의 성인모델과 양산단층계의 주향이동운동. 지질학회지, 28, 84-109
2 손문, 김인수, 이동호, 이준동, 김진섭, 백인성, 2000, 울산단층일원에 대한 지역지질 특성연구: 제3기 마이오세 와읍분지의 지질구조와 대자율비등방성(AMS). 지질학회지, 36, 195-216
3 한종환, 곽영훈, 손진담, 손병국, 1987, 한국 동남부지역 제3기 퇴적분지의 지체구조발달 및 퇴적환경 연구 (II). 연구보고서 KR-86-2-(B)-4, 한국동력자원연구소, 109p
4 Lallemand, S. and Jolivet, L., 1986, The Japan Sea, a pullapart basin ? Earth and Planetary Science Letter, 76, 375-389   DOI   ScienceOn
5 McKenzie, D., 1978, Some remarks of the development of sedimentary basins. Earth and Planetary Science Letters, 40, 25-32   DOI   ScienceOn
6 Son, M., Kim, I.-S. and Sohn, Y.K., 2005, Evolution of the Miocene Waup Basin, SE Korea, in response to dextral shear along the southeastern margin of the East Sea (Sea of Japan). Journal of Asian Earth Sciences, 25, 529-544   DOI   ScienceOn
7 Wernicke, B., 1981, Low-angle normal faults in the Basin and Range Province: nappe tectonics in an extending orogen. Nature, 291, 645-648   DOI
8 최범영, 1991, 단층자료를 이용한 응력 텐서 계산방법에 대하여. 지질학회지, 27, 383-393
9 Kimura, G. and Tamaki, K., 1986, Collision, rotation and back-arc spreading: the case of the Okhotsk and Japan seas. Tectonics, 5, 389-401   DOI
10 손문, 김인수, 1994, 울산군 강동면 제3기 정자분지의 지질구조와 분지발달. 자원환경지질, 27, 65-80
11 Yoon, S., 1992, Paleoenvironmental change of the Tertiary Yangnam and Pohang basins of the southern Korea Peninsula. Mem. Geol. Soc. Japan, 37, 117-124
12 Wise, D.U., 1992, Dip domain method applied to the Mesozoic Connecticut Valley Rift Basins. Tectonics, 11, 1357-1368   DOI
13 Yoon, S., 1997, Miocene-Pleistocene volcanism and tectonics in southern Korea and their relationship to the opening of the Japan Sea. Tectonophysics, 281, 53-70   DOI   ScienceOn
14 Yun, H., Yi, S. and Byun, H., 1997, Tertiary system of Korea. Paleont. Soc. Korea Special Publication, 3, 1-30
15 Sohn, Y.K. and Son, M., 2004, Synrift stratigraphic geometry in a transfer zone coarse-grained delta complex, Miocene Pohang Basin, SE Korea. Sedimentology, 51, 1387-1408   DOI   ScienceOn
16 Yoon, S., 1991, Geologic events of the Tertiary Yangnam and Pohang basins, Korea: With a remark on the origin of the Yamato basin of the Japan Sea. Saito Ho-on Kai Spec. Pub., 3, 303-309
17 Jolivet, L., Davy, P. and Cobbold, P., 1990, Right-lateral shear along the northwest Pacific margin and the India-Eurasia collision. Tectonics, 9, 1409-1419   DOI
18 윤선, 1988, 한반도 남부의 제3기 층서. 한국과학재단 연구보고서, 25p
19 Fabbri, O., Charvet, J. and Fournier, M., 1996, Alternate senses of displacement along the Tsushima fault system during the Neogene based on fracture analyses near the western margin of the Japan Sea. Tectonophysics, 257, 275-295   DOI   ScienceOn
20 김진섭, 손문, 김종선, 김인수, 2002, 한반도 남동부 제3기 암맥군과 지구조적 중요성. 암석학회지, 11, 169-181   ScienceOn
21 김종선, 손문, 김진섭, 김정민, 2005, 한반도 남동부 제3기 암맥군과 화산암류의 $^{40}Ar/^{39}Ar $ 연대. 암석학회지, 14, 93-107   ScienceOn
22 Lucchitta, I. and Suneson, N.H., 1993, Dips and extension. Geological Society of America Bulletin, 105, 1346-1356   DOI   ScienceOn
23 진명식, 김성재, 신성천, 1988, K-Ar 및 휫션트랙법에 의한 포항-감포 일대 화산암류의 암석연령 측정연구. 연구보고서 KR-87-27 동위원소 지질연구, 한국동력자원연구소, 51-88
24 손문, 1998, 한반도 동남부 제3기 마이오세 분지의 형성과발달: 구조지질학 및 고자기학적 고찰. 부산대학교 이학박사 학위논문, 233p
25 서만철, 김민규, 최석원, 1994, 경북 추령터널 부근 암석의풍화 특성에 관한 지구물리화학적 연구. 지질공학회지, 4, 269-281   ScienceOn
26 Tateiwa, I., 1924, 1:50,000 Geological Atlas of Chosen, No. 2, Ennichi, Kuryuho and Choyo sheets. Geol. Surv. Chosen, (in Japanese)
27 진명식, 김성재, 신성천, 1989, K-Ar 및 휫션트랙법에 의한 한국 동남부 지역 화강암 및 화산암의 암석 광물연령 측정연구. 한국동력자원연구소 연구보고서, KR-88-6D, 53-84
28 Son, M., Seo, H.-J. and Kim, I.-S., 2000, Geological Structures and Evolution of the Miocene Eoil Basin, Southeastern Korea. Geosciences Journal, 4, 73-88   DOI