Skip to main content
Earth, Planets and Space
Download PDF
  • Article
  • Published:

Paleomagnetic and rock magnetic studies of Cretaceous rocks in the Eumsung basin, Korea

Earth, Planets and Space volume 51, pages 337–349 (1999)Cite this article

Abstract

Paleomagnetic results are obtained from 41 sites from the Chopyeong Formation within the Eumsung basin, located along the northern boundary of the Ogcheon Belt, Korea. The Chopyeong Formation, deposited in early Cretaceous, yields the mean direction of D/I = 347.8°/57.3° (k = 92.8, α95 = 2.5°) before tilt correction, and D/I = 0.7°/61.7° (k = 19.6, α95 = 5.5°) after tilt correction. The parameter estimating fold test and the stepwise unfolding test of the red bed and greenish mudstone of the Chopyeong Formation yield the maximum value of k at 21.9% and at 20% untilting, respectively, indicating that the remanence whose mean direction of D/I = 350.8°/57.9° (k = 177.9, α95 = 1.8°) at 20% untilting was acquired during or after tilting of the strata. The comparison of the paleomagnetic pole from the Chopyeong Formation with those from the Youngdong basin and the Euiseong area in the Gyeongsang basin indicates that the remanence was acquired during late Cretaceous to early Tertiary. Electron microscope observations and rock magnetic experiments show that secondary hematite and magnetite grains of single domain to pseudo-single domain size were authigenically formed under the influence of fluids presumably triggered by the igneous activities, thus confirm the chemical remagnetization.

It is revealed that the age of the granite in the east is Jurassic because the mean direction of the east granite (D/I = 347.0°/47.7°, k = 40.2, α95 = 3.6°) is similar to the Jurassic direction of Korea Peninsula. The age of the granite in the west, however, is left undetermined whether it is Cretaceous or Jurassic because of the weak intensity and instability of the remanence of the granite during demagnetization treatments.

References

  • Butler, R. F., Paleomagnetism: Magnetic Domains to Geologic Terranes, 195 pp., Blackwell Scientific Publications, Boston, 1992.

    Google Scholar 

  • Cheong, C. H., Y. A. Park, and H. M. Kim, Explanatory Text of the Geological Map of Eumseong Sheet (6724-IV), 32 pp., Korea Research Institute of Geoscience and Mineral Resources, 1976.

  • Cho, Y. Y., A paleomagnetic study of Cretaceous rocks from the Youngdong Basin, M.Sc. Thesis, 21 pp., Korea University, 1994.

  • Choi, S. J., B. C. Kim, H. Y. Chun, and Y. B. Kim, Charophytes from the Chopyeong Formation (Cretaceous) of the Eumsung Basin, Korea, J. Geol. Soc. Korea, 31, 523–528, 1995.

    Google Scholar 

  • Chun, H. Y., Y. S. Choi, S. J. Choi, Y. B. Kim, B. C. Kim, B. S. Lee, and P. Y. Bong, Fossil Floral and Faunal Assemblages and Paleoenvironmental Modelling Study on the Cretaceous Sedimentary Basins Scattered in/near the Ogcheon Belt, Annual Rep., KR-94(T)-11, 1994.

  • Day, R., M. Fuller, and V. A. Schmidt, Hysteresis properties of titanomagnetite: grain-size and compositional dependence, Phys. Earth Planet. Inter., 13, 260–267, 1977.

    Article  Google Scholar 

  • Doh, S. J. and K. H. Kim, A paleomagnetic study of Cretaceous rocks from the Euiseong area, Econ. Environ. Geol., 27, 263–279, 1994.

    Google Scholar 

  • Doh, S. J., C. S. Hwang, and K. H. Kim, A paleomagnetic study of sedimentary rocks from Kyeongsang Supergroup in Milyang Sub-Basin, J. Geol. Soc. Korea, 30, 211–228, 1994.

    Google Scholar 

  • Elmore, R. D. and C. McCabe, The occurrence and origin of remagnetization in the sedimentary rocks of North America, Rev. Geophys., suppl. (IUGG report), 29, 377–383, 1991.

    Google Scholar 

  • Fisher, R. A., Dispersion on a sphere, Roy. Soc. (London) Proc. Ser. A, 217, 295–305, 1953.

    Article  Google Scholar 

  • Hudson, M. R., R. L. Reynolds, and N. S. Fisherman, Synfolding magnetization in the Jurassic preuss sandstone, Wyoming-Idaho-Utah Thrust Belt, J. Geophys. Res., 94, 13,681–13,705, 1989.

    Article  Google Scholar 

  • Ito, H. and K. Tokieda, An interpretation of paleomagnetic results from Cretaceous granites in South Korea, J. Geomag. Geoelectr., 32, 275–284, 1980.

    Article  Google Scholar 

  • Joo, S. H., D. J. Lee, and D. H. Kim, Rb-Sr Age Dating of the Granite in the Choengju Area, Investigate Rep., 6, 111–131, 1979.

    Google Scholar 

  • Kang, P. C., W. Y. Kim, and C. H. Lee, Explanatory Text of the Geological Map of Jinchon Sheet (6724-1), 16 pp., Korea Research Institute of Geoscience and Mineral Resources, 1980.

  • Kent, D. V., Thermoviscous remagnetization in some Appalachian limestones, Geophys. Res. Lett., 12, 805–808, 1985.

    Article  Google Scholar 

  • Kim, I. S. and H. C. Kang, Paleomagnetism of Tertiary rocks in the Eoil Basin and its vicinities, Southeast Korea, J. Geol. Soc. Korea, 25, 273–293, 1989.

    Google Scholar 

  • Kim, I. S., H. K. Lee, H. Yun, and H. C. Kang, Paleomagnetism of Cretaceous rocks in the Uisong Area, Kyongsang Basin, Korea, J. Korean Inst. Mining Geol., 26, 403–420, 1993.

    Google Scholar 

  • Kim, K. H. and B. I. Jeong, A study on the paleomagnetism of Southern Korea since Permian, J. Korean Inst. Mining Geol., 19, 67–83, 1986.

    Google Scholar 

  • Kim, K. H. and D. S. Kim, Magnetostratigraphy of the Chaeyaksan, Konchonri, and Jusasan Formation distributed in Taeku-Kyongju area, J. Geol. Soc. Korea, 27, 40–51, 1991.

    Google Scholar 

  • Kim, K. and R. Van der Voo, Jurassic and Triassic paleomagnetism of South Korea, Tectonics, 9, 699–717, 1990.

    Article  Google Scholar 

  • Kim, O. J., Timing of intrusion and tectonic movement of granite in the South Korea, J. Korean Inst. Mining Geol., 4, 1–9, 1971.

    Google Scholar 

  • Kirschvink, J. L., The least square line and plane and the analysis of paleomagnetic data, Geophys. J. R. Astr. Soc., 62, 699–718, 1980.

    Article  Google Scholar 

  • Lee, C. H. and J. H. Kim, Explanatory Text of the Geological Map of Jeungpyeong Sheet (6724-III), 16 pp., Geological Survey of Korea, 1971.

  • Lee, G. D., J. Besse, and V. Courtillot, Eastern asia in the cretaceous: New paleomagnetic data from South Korea and a new look at Chinese and Japanese data, J. Geophys. Res., 92, 3580–3596, 1987.

    Article  Google Scholar 

  • Lee, H. Y., H. S. Yun, and J. D. Lee, Geological Report of the Pyongchon Sheet, 15 pp., KIER, 1989.

  • Lee, M. W., C. K. Won, and K. H. Kim, The cretaceous volcanic activities and petrology in Kyonggi Massif—on the Kapcheon, Eumsung and Kongju Basin, J. Geol. Soc. Korea, 28, 314–333, 1992.

    Google Scholar 

  • MacFadden, P. L. and D. L. Jones, The fold test in palaeomagnetism, Geophys. J. R. astr. Soc., 67, 53–58, 1981.

    Article  Google Scholar 

  • McCabe, C., R. Van der Voo, C. R. Peacor, C. R. Scotese, and R. Freeman, Diagenetic magnetite carries ancient secondary remanence in some Paleozoic sedimentary carbonates, Geology, 11, 221–223, 1983.

    Article  Google Scholar 

  • McElhinny, M. W., Statiscal significance of the fold test in paleomagnetism, Geophys. J. R. astr. Soc., 8, 338–340, 1964.

    Article  Google Scholar 

  • Min, K. D., O. J. Kim, S. K. Yun, D. S. Lee, and S. H. Joo, Applicability of the plate tectonics to the post-late Cretaceous igneous activity and mineralization in the southern part of south Korea (I), J. Korean Inst. Mining Geol., 15, 123–154, 1982.

    Google Scholar 

  • Oliver, J., Fluids expelled tectonically from orogenic belts; Their role in hydrocarbon migration and other geologic phenomena, Geology, 14, 99–102, 1986.

    Article  Google Scholar 

  • Otofuji, Y., J. Y. Oh, T. Hirajima, K. D. Min, and S. Sasajima, Paleomagnetism and age determination of Cretaceous rocks from Gyeongsang Basin, Korean Peninsula, in The Tectonic and Geologic Evolution of Southeast Asian Seas and Islands, II, edited by D. E. Hayes, Geophys. Monogr. 27, pp. 388–396, Am. Geophys. Union, 1982.

  • Otofuji, Y., K. H. Kim, H. Inokuchi, H. Morinaga, F. Murata, H. Katao, and K. Yaskawa, A paleomagnetic reconnaissance of Permian to Cretaceous sedimentary rocks in southern part of Korean Peninsula, J. Geomag. Geoelectr., 38, 387–402, 1986.

    Article  Google Scholar 

  • Otofuji, Y., K. Katsuargi, H. Inokuchi, K. Yaskawa, K. H. Kim, D. S. Lee, and H. Y. Lee, Remagnetization of Cambrian to Triassic sedimentary rocks of the Paegunsan Sycline of the Okch’on Zone, South Korea, J. Geomag. Geoelectr., 41, 119–135, 1989.

    Article  Google Scholar 

  • Piper, J. D. A., Palaeomagnetism and the Continental Crust, 91 pp., Open University Press, Milton Keynes, 1987.

    Google Scholar 

  • Pullaiah, G., E. Irving, K. L. Buchan, and D. J. Dunlop, Magnetization changes caused by burial and uplift, Earth Planet. Sci. Lett., 28, 133–143, 1975.

    Article  Google Scholar 

  • Suk, D. W., R. Van der Voo, and D. R. Peacor, Scanning and transmission electro microscope observations of magnetite and other iron phases in Ordovician carbonates from east Tennessee, J. Geophys. Res., 95, 12,327–12,336, 1990.

    Article  Google Scholar 

  • Thompson, R., J. Bloemendal, J. A. Dearing, F. Oldfield, T. A. Rummery, J. C. Stober, and G. M. Turner, Environmental applications of magnetic measurements, Science, 207, 481–486, 1980.

    Article  Google Scholar 

  • Walker, T. R., E. E. Larson, and R. P. Hoblitt, Nature and origin of hematite in the Moenkopi Formation (Triassic), Colorado Plateau: A contribution to the origin of magnetism in red beds, J. Geophys. Res., 86, 317–333, 1981.

    Article  Google Scholar 

  • Watson, G. S. and R. J. Enkin, The fold test in paleomagnetism as a parameter estimation problem, Geophys. Res. Lett., 20, 2,135–2,137, 1993.

    Article  Google Scholar 

  • Won, C. K., M. W. Lee, J. H. Noh, and H. K. Lee, Cretaceous volcanic activity in Tongri Basin, J. Geol. Soc. Korea, 30, 542–562, 1994.

    Google Scholar 

  • Zijderveld, J. D. A., AC demagnetization of rocks: Analysis of results, in Method in Paleomagnetism, edited by D. W. Collinson, K. M. Creer, and S. K. Runcorn, pp. 254–286, Elsevier, Amsterdam, 1967.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Earth and Environmental Sciences, Korea University, Seoul, 136-701, Korea

    Seong-Jae Doh & Bang-Yeon Kim

  2. Department of Earth and Marine Sciences, Hanyang University, Ansan, 425-791, Korea

    Dong-Woo Suk

Authors
  1. Seong-Jae Doh
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Dong-Woo Suk
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Bang-Yeon Kim
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Seong-Jae Doh.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Doh, SJ., Suk, DW. & Kim, BY. Paleomagnetic and rock magnetic studies of Cretaceous rocks in the Eumsung basin, Korea. Earth Planet Sp 51, 337–349 (1999). https://doi.org/10.1186/BF03352238

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1186/BF03352238

Keywords