Browse > Article
http://dx.doi.org/10.7854/JPSK.2018.27.2.73

Source Evaluation of Rhyolitic Dike Swarm from Compositional Correlations of Igneous Intrusions in the Northern Cheongsong, Korea  

Hwang, Sang Koo (Department of Earth and Environmental Sciences, Andong National University)
Kwon, Tae Ho (Department of Earth and Environmental Sciences, Andong National University)
Kim, Hyo Jin (Stainless Steel Raw Materials Procurement Division, POSCO)
Ahn, Ung San (World Heritage Office, Jeju Special Self-Governing Provincial Government)
Jeong, Gi Young (Department of Earth and Environmental Sciences, Andong National University)
Publication Information
The Journal of the Petrological Society of Korea / v.27, no.2, 2018 , pp. 73-84 More about this Journal
Abstract
In the northern Cheongsong, there are occurred igneous intrusions: Cheongsong dike swarm, Jungtaesan laccolith, Galpyeongji stock. The swarm is composed of rhyolitic dikes that have developed many various spherulites. The dikes represent an geometrically radical pattern centering the Galpyeongji stock, but also geochemistry of the intrusions indicate the swarm source. Here we report the compositional data for 28 samples from the three intrusions. All of the intrusions belong to rhyolitic composition, but according to compositional correlation, there are considerable overlaps between intrusion compositions. In particular, the Cheongsong dike swarm is divided into several dike groups by rock color and shows compositional diversity, but the composition of the dikes generally overlap with compositions of other intrusions. The Jungtaesan laccolith is enriched in alkali, $K_2O$ and $Al_2O_3$ and depleted in $Fe_2O_3{^t}$, $TiO_2$ and REE compared to the Cheongsong dike swarm. In contrast, the Galpyeongji stock is narrow in composition range, and commonly has sharp compositional overlaps with the Cheongsong dike swarm. According to the compositional correlations, the stock is considered to be a source of the swarm and it is connected to an episode of volcanism.
Keywords
Igneous intrusions; Cheongsong dike swarm; Compositional correalations; Compositional overlaps; Source;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Hwang, S.K. and Choo, C.O., 2006, Pattern and origin of spherulites in a rhyolite dike swarm, northeastern Cheongsong, Korea. Global Geology, 9(1), 60-79.
2 Hwang, S.K., 2007, Cooling processes of the Juwangsan Tuff in eastern Cheongsong, Korea. Journal of Geological Society of Korea, 43, 353-367.
3 Hwang, S.K., Kwon, T.H., and Seo, S.H., 2015, Pattern and origin of the rhyolitic dike swarm, northeastern Cheongsong, Korea. Journal of Petrological Society of Korea, 24, 91-105.   DOI
4 Kim, S.W. and Park, B.S., 1970, Explanatory text of the Geological Map of Yeongyang Sheet. Geological Survey of Korea, 25p.
5 Lee, H.G. and Hong, S.H., 1973, Explanatory text of the Geological Map of Cheongsong Sheet. Geological and Mineral Institute of Korea, 23p.
6 Mangan, M.T., Wright, T.L., Swanson, D.A., and Byerly, G.R., 1986, Regional correlation of Grande Ronde Basalt flows, Colombia River Basalt Group, Washington, Oregon, and Idaho. Geological Society of America Bulletin, 97, 1300-1318.   DOI
7 Nakamura N., 1974, Determinaion of REE, Ba, Fe, Mg, Na, and K in carbonaceous and ordinary chondrites. Geochimica Cosmochimica Acta, 38, 757-775.   DOI
8 Ode, H., 1957, Mechanical analysis of the dike pattern of the Spanish Peak area, Colorado. Geological Society of America Bulletin, 68, 567-578.   DOI
9 Oh, C.W., Kim, S.W., Hwang, S.K., Son, C.W., Kim, C.S., and Kim, H.S., 2004, The study on the spherulitic rhyolites in the northern part of Juwang Mt., Cheongsong. Journal of Petrological Society of Korea, 13, 103-118.
10 Phillips, W.J., 1974, The dynamic emplacement of cone sheets. Tectonophysics, 24, 69-84.   DOI
11 Pollard, D.D., 1987, Elementary fracture mechanics applied to the structural interpretation of dykes. Geological Assoc. Canadian Special Paper, 34, 5-24.
12 Sun, S.-S. and McDonough, W.F., 1989, Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and process. In Magmatism in the Ocean Basins (eds. Saunders, A.D. and Norry, M.J.) Geological Society of Special Publication, 313-345.
13 Gill, J.B., 1981, Orogenic andesite and plate tectonics. Springer-Verlag, Berlin. 390p.
14 Chevallier, L. and Verwoerd, W.J., 1988, A numerical model for the mechanical behavior of intraplate volcanoes. Journal of Geophysical Research, 93, 4182-4198.   DOI
15 Chevallier, L. and Verwoerd, W.J., 1990, Influence of temperature on the distribution of stress and displacement in a volcano: a numerical approach. Bulletin of Volcanology, 52, 413-425.   DOI
16 Hwang, S.K., 2002, Magmatic evolution of volcanic rocks related with the Guamsan caldera, southeastern Korea. Journal of Geological Society of Korea, 38, 341-359.