Fig. 1. Geological map of the study area, showing sample locations of the whole rock chemical analysis (●) and the SHRIMP zircon U-Pb age dating (■).
Fig. 2. Outcrop photographs and photomicrographs of the Saryangdo Tuff.
Fig. 4. Harker variation diagram of the major and trace elements vs. SiO2 for the volcanic rocks of Saryangdo area. Symbols are the same as in Fig. 3.
Fig. 5. Haker variation diagrams of some rare earth elements vs. Zr for the volcanic rocks of the Saryangdo area. Symbols are the same as in Fig. 3.
Fig. 6. Chondrite nomalized REE patterns for the volcanic rocks of the Saryangdo area. Symbols are the same as in Fig. 3.
Fig. 10. Schematic diagram showing compositional zonation (a, b) and eruption process (c, d) of Saryangdo Tuff (Rh, rhyolite; Da, dacite; An, andesite).
Fig. 3. (a) Total alkalis vs. SiO2 (wt%) plotting for the volcanic rocks in the Saryangdo area. A curve diving between alkali (A) and sub-alkalic (SA) magma seriesis from Irvine and Baragar (1971), Kuno (1966); (b) Zr/TiO2-Nb/Y diagram for the volcanic rocks of the Saryangdo area(after Winchester and Floyd, 1976).
Fig. 7. (a) Discriminant diagram of Rb as. Y+Nb showing the aparrent affinity of volcanic arc for the volcanic rocks of the Saryangdo area (after Pearce et al., 1984); (b) La/Yb vs. Th/Yb variation diagram for volcanic rocks of the Saryangdo area (after Condie, 1989). Symbols are the same as in Fig. 3.
Fig. 8. (a) (Ce/Yb)N-CeN variation diagram distinguising between general petrogenetic processes by Gill (1981)(1; Effects of fractional crystallization, 2; Compositions of partial melts of peridotite, 3; Compositions of partial melts of eclogite, 4; Compositions of partial melts of average continental crust). (b) La/Yb-La diagram showing two different lines of both partial melting trend and differentiation trend(after Martin, 1987).
Fig. 9. (a) Vertical spatial diagrams for major element from of Saryangdo Tuff; (b) Vertical spatial diagrams for trace element from of Saryangdo Tuff.
Table 1. Major element(wt%), trace element(ppm) and rare element(ppm) compositions for the Cretaceous volcanic rocks in Saryangdo area
참고문헌
- Chi, J.M., Kim, H.S., Oh, I.S., Kim, H.C., 1983, Explanatory text of the geological map of Samcheonpo Sheet. Korea Institute of Energy and Resources, 12p.
- Condie K.C., 1989, Geochemical changes in basalts and andesites across the Archean-Proterozoic boundary. identification and significance. Lithos 23: 1-18. https://doi.org/10.1016/0024-4937(89)90020-0
- Gill, J.B., 1981, Orogenic andesites and plate tectonics. Springer-Verlag, 336p.
- Hwang, S.K., 2012, Tectonic setting and arc volcanisms of the Gyeongsang arc in the southeastern Korean Peninsula. Journal of the Petrological Society of Korea, 21, 367-383. https://doi.org/10.7854/JPSK.2012.21.3.367
- Hwang, S.K., Jo, I.H., 2014, Petrologic evolution processes of the latest volcanic rocks in Ulleung Island, East Sea. Journal of the Geological Society of Korea. Journal of the Geological Society of Korea, 50, 343-363. https://doi.org/10.14770/jgsk.2014.50.3.343
- Hwang, S.K., Kim, S.W., 1994a, Petrology of Cretaceous volcanic rocks in the Milyang-Yangsan area, Korea : Petrotectonic setting. Journal of the Geological Society of Korea, 30, 229-241.
- Hwang, S.K., Kim, S.W., 1994b, Petrology of Cretaceous volcanic rocks in the Miryang-Yangsan area, Korea (II) : Petrogenesis. Journal of the Geological Society of Korea, 30, 563-577.
- Hwang, S.K., Lee, S.J., Ahn, U.S., Song, K.Y., 2018a, Multiple magmas and their evolutions of the Cretaceous volcanic rocks in and around Mireukdo Island, Tongyeong. Journal of the Petrological Society of Korea, 27, 121-138. https://doi.org/10.7854/JPSK.2018.27.3.121
- Hwang, S.K., Lee, S.J., Song, K.Y., Yi, K.W., 2018b, SHRIMP U-Pb dating and chronostratigraphy of the volcanic rocks around the Mireukdo Island, Tongyeong, Korea. Journal of the Petrological Society of Korea, 27, 25-36. https://doi.org/10.7854/JPSK.2018.27.1.25
- Hwang, S.K., Park, S.H., Song, K.Y., 2016, Geological report of the MiJo.Mireukdo Sheets. Korea Institute of Geoscience and Mineral Resources. 78p.
- Irvine, T.N., and Baragar, W. R. A., 1971, A guide to the chemical classification of the common igneous rocks, Canadian Journal of Earth Science, 8, 523-548. https://doi.org/10.1139/e71-055
- Jwa, Y.J., 1998, Petrology of the igneous rocks in the Goseong area, Gyeongsang Basin II. Trace element geochemistry and Rb-Sr radiometric age. Economic and Environmental Geology, 31, 473-483.
- Kim, J.S., Lee, J.D., Jeong, N.I., 1999, Petrochemical study on the Cretaceous volcanic rocks in the Namhae island, Korea. The Korean Earth Science Society, 20, 640-651.
- Kim, S.W., Lee, J.Y., Kim, Y.K., Koh, I.S., 1991, Petrology of the Cretaceous volcanic rocks in southern Yuchon minor Basin. Journal of the Geological Society of Korea, 27, 24-39.
- Kim, S.W., Lee Y.G., 1981, Petrology and structural geology of the late cretaceous volcanic rocks in the northeastern part of Yucheon basin. Economic and Environmental Geology, 14, 35-49.
- Kuno, H., 1966, Lateral variation of basalt magma type across continental margins and island arcs. Bulletin Volcanologique, 29, 195-222. https://doi.org/10.1007/BF02597153
- Le Maitre, R.W., 1989, A classification of the igneous rocks and glossary of terms. Blackwell, Oxford, 193p.
- Martin, H., 1987, Petrogenesis of Archaean trondhjemites, tonalites, and granodiorites from eastern Finland: major and trace element geochemistry. J. Petrol, 28, 921-953. https://doi.org/10.1093/petrology/28.5.921
- Nakamura, N., 1974, Determination of REE, Ba, Fe, Mg, Na and K in carbonaceous and ordinary chondrites. Geochimica et Cosmochimica Acta, 38, 757-773. https://doi.org/10.1016/0016-7037(74)90149-5
- Pearce, J.A., Harris, N.B.W. and Tindle, A.G., 1984, Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Journal of Petrology, 25, 956-983. https://doi.org/10.1093/petrology/25.4.956
- Smith, R.C., 1979, Ash-flow magmatism. Geological Society of America Special Paper, 180, 5-27.
- Sung, J.G., Kim, J.S., 2012, Petrochemical characteristics and review on petrogenesis on Cretaceous to Tertiary volcanic rocks in the Kyongsang Basin. Journal of the Petrological Society of Korea, 21, 217-233. https://doi.org/10.7854/JPSK.2012.21.2.217
- You, H.S., Kim, D.J., Yoo, K.A., You, Y.S., 2005, Geology and coastal environment of Saryangdo. Journal of Island Studies, 17, 157-171.
- Yun, S.H., Kim, J.S., Kim, Y.L., 1994, Petrology of the Cretaceous volcanic rocks in Pusan area, Korea (II): - Petrogenesis and tectonic setting-. Journal of Korean Earth Science Society, 15, 356-365.
- Yun, S.H., Lee J.D., Lee, S.W., Koh, J.S., Seo, Y.J., 1997, Petrology of the volcanic rocks in Geoje Island, South Korea. Journal of the Petrological Society of Korea, 6, 1-18.
- Wilson, M., 1989, Igneous petrogenesis, Unwin Hyman, London, 466p.
- Winchester, J.A. and Floyd, P.A., 1977, Geochemical discrimination of different magma series and their differentiation products using immobile elements. Che., Geol,, 20, 325-343. https://doi.org/10.1016/0009-2541(77)90057-2