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http://dx.doi.org/10.9719/EEG.2017.50.6.467

SHRIMP U-Pb Dating and Volcanic Processes of the Volcanic Rocks in the Guamsan Caldera, Cheongsong, Korea  

Hwang, Sang Koo (Department of Earth and Environmental Science, Andong National University)
Jo, In Hwa (Division of Environmental and Material Sciences, Korea Basic Science Institute)
Yi, Keewook (Division of Environmental and Material Sciences, Korea Basic Science Institute)
Publication Information
Economic and Environmental Geology / v.50, no.6, 2017 , pp. 467-476 More about this Journal
Abstract
Volcanic rocks related to the Guamsan cadera, which find in the southeastern Cheongsong, are divided into Volcanic breccia, Guamsan Tuff and Post-collapse intrusions. We determined their eruption, intrusion and caldera-forming timings based on SHRIMP U-Pb zircon dating. The dating results yield earlier eruption age of $63.77{\pm}0.94Ma$ from the lower ash-flow tuff and an later eruption age of $60.1{\pm}1.8Ma$ from the upper ash-flow tuff of the Guamsam Tuff, and intrusion age of $60.65{\pm}0.95Ma$ from the rhyolite ring dyke of the Post-collapse intrusions. The age data suggest that the Guamsan caldera is formed in 60.65~60.1 Ma between eruption of the upper ash-flow tuff and intrusion of the rhyolite ring dyke. The Guamsan cadera exhibits the volcanic processes of a perfect igneous cycle passing from ash-flow eruptions through caldera collapse to ring intrusions during 63.77~60.1 Ma.
Keywords
Guamsan cadera; Guamsan Tuff; Post-collapse intrusions; U-Pb dating; eruption timing; intrusion timing; timing volcanic processes;
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Times Cited By KSCI : 5  (Citation Analysis)
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1 Hwang, S.K., Son, Y.W. and Choi, J.O. (2017) Geological history and landscapes of the Juwangsan National Park, Cheongsong. Journal of Petrological Society of Korea, v.26, p. (in Korean with English abstract)
2 Ireland, T.R. and Williams, I.S. (2003) Considerations in zircon geochronology by SIMS. In: Hanchar, J.M. and Hoskin, P.W.O. (eds.), Zircon: Reviews in Mineralogy and Geochemistry, Mineralogical Society of America, v.53, p.215-241.
3 Jo, N.S. and Hwang, S.K. (2017) Determination of flow direction from flow indicators and lateral grading in the Naeyeonsan Tuff, northern Pohang, Korea. Journal of Petrological Society of Korea, v.26, p.153-163 (in Korean with English abstract).
4 Kwon, Y.I. and Lee, I.K. (1973) Explanatory text of the geological map of Dopyeong Sheet, Geological and Mineral Institute of Korea, 9p.
5 Lipman, P.W. (1984) Roots of ash-flow calderas in western North America: windows into the tops of granitic batholiths. Journal of Geophysical Research, v.89, p.8801-8841.   DOI
6 Ludwig, K.R (2008) SQUID 2: A User's Manual. Berkeley, CA, Berkeley Geochronology Center Special Publication, No.2, 100p.
7 Oh, I.S. and Jeong, G.S. (1975) Explanatory text of the geological map of Gigae Sheet, Geological and Mineral Institute of Korea, 25p.
8 Smith, R.L. and Bailey, R.A. (1968) Resurge cauldrons. In Coats et al., (eds.), Studies in Volcanology, p.613-662.
9 Vavra, G., Schmid, R. and Gebauer, D. (1999) Internal morphology, habit and U-Th-Pb microanalysis of amphibolite-to-granulite facies zircons: Geochronology of the Ivrea Zone (Southern Alps). Contributions to Mineralogy and Petrology, v.134, p.380-404.   DOI
10 Williams, I.S. (1998) U-Th-Pb geochronology by ion microprobe. In: McKibben, M.A., Shanks, W.C.P., and Ridley, W.I. (eds.), Applications of microanalytical techniques to understanding mineralizing processes. Reviews in Economic Geology, 7, Society of Economic Geologists, p.1-35.
11 Hwang, S.K., Jo, I.H. and Yi, K. (2017) SHRIMP U-Pb datings and igneous processes of the igneous rocks around the Myeonbongsan caldera, Cheongsong, Korea. Journal of Geological Society of Korea, v.53, p.781-796 (in Korean with English abstract).   DOI
12 Won, C.K., Kang, P.C. and Lee, S.H. (1978) Study on the tectonic interpretation and igneous pluton in the Gyeongsang basin(I). Journal of Geological Society of Korea, v.14, p.79-92.
13 Ahn, U.S. and Hwang, S.K. (2007) Determination of flow direction from flow indicators in the Muposan Tuff, southern and eastern Cheongsong, Korea. Eonomic and Environmental Geology. v.40, p.319-330 (in Korean with English abstract).
14 Chang, K.H. (1975) Cretaceous stratigraphy of southeast Korea. Journal of Geological Society of Korea, v.11, p.1-23.
15 Chang, K.H. (1977) Late Mesozoic stratigraphy, sedimentation and tectonics of southeastern Korea. Journal of Geological Society of Korea, v.13, p.76-90 (in Korean with English abstract).
16 Chang, K.H. (1988) Cretaceous stratigraphy and paleocurrent analysis of Kyongsang Basin, Korea. Journal of Geological Society of Korea v.24, p.194-205.
17 Druitt, T.H. and Sparks, R.S.J. (1985) On the formation of calderas during ignimbrite eruptions, Nature, v.310, p.679-681.
18 Hartman, L.A., Leite, J.A.D., Silva, L.C., Remus, M.V.D., McNaughton, N.J., Groves, D.I., Fletcher, I.R., Santos, J.O.S. and Vasconcellos, M.A.Z. (2000) Advances in SHRIMP geochronology and their impact on understanding the tectonic and metallogenic evolution of southern Brazil. Australian Journal of Earth Sciences, v.47, p.829-844.   DOI
19 Hwang, S.K. (2002a) Collapse type and evolution of the Guamsan caldera, southeastern Cheongsong, Korea. Journal of Geological Society of Korea, v.38, p.199-216 (in Korean with English abstract).
20 Hwang, S.K. (2002b) Magmatic evolution of volcanic rocks related with the Guamsan caldera, southeastern Korea. Journal of Geological Society of Korea, v.38, p.341-359 (in Korean with English abstract).
21 Hwang, S.K., Jo, I.H. and Yi, K. (2016) SHRIMP zircon U-Pb dating and stratigraphical relationship of the Bunam Stock and Muposan Tuff, Cheongsong. Journal of Geological Society of Korea, v.52, p.405-419 (in Korean with English abstract).   DOI
22 Hwang, S.K and Seo, S.H. (2016) Field evidence of magma mixing from concentric zonings and mafic microgranular enclaves hosted in Bunam Stock, Korea. Journal of Petrological Society of Korea, v.25, p.311-325 (in Korean with English abstract).   DOI
23 Hwang, S.K., Son, J.D., Lee, B.J. and Reedman, A.J. (2002) Eruptive phases and volcanic processes of the Guamsan caldera, southeastern Cheongsong, Korea. Journal of Petrological Society of Korea, v.11, p.74-89 (in Korean with English abstract).