The Journal of the Petrological Society of Korea (암석학회지)

The Petrological Society of Korea (한국암석학회)
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Heavy Mineral Analysis of the Cretaceous Hayang Group Sandstones, Northeastern Gyeongsang Basin

경상분지 북동부 백악기 하양층군 사암의 중광물분석

  • 이용태 (경북대학교 자연과학대학 지질학과) ;
  • 신영식 (경북대학교 자연과학대학 지질학과) ;
  • 김상욱 (경북대학교 자연과학대학 지질학과) ;
  • 이윤종 (경북대학교 사범대학 지학과) ;
  • 고인석 (경북대학교 자연과학대학 지질학과)
  • Published : 1999.03.01
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Abstract

The northeastern part of the Gyeongsang Basin is widely covered by the Cretaceous Hayang Group (Aptian to Albian). The Hayang Group consists of the IIjig. Hupyeongdong, Jeomgog, and Sagog formations. Heavy mineral analysis was carried out to define the possible source rocks of the Haynag Group snadstones. Heavy minerals separated from IIjig, Hupyeongdong, and Jeomgog sandstones are hematite, ilmenite, leucoxene, magnetite, pyrite, actinolite, andalusite, apatite, biotite, chlorite, epidote, garnet, hornblende, kyanite, monazite, muscovite, rutile, sphene, spinel, staurolite, tourmaline, and zircon. Based on their close association and sensitiveness, the heavy mineral assemblages can be classified into 6 syutes: 1)apatite-green tourmaline-sphene-colorless/yellowish zircon; 2) colorless garnet-epidote-rutile-brown tourmaline; 3) rounded purple zircon-rounded tourmaline-rounded rutile; 4) augite-hornblende-color- less zircon; 5) epidote-garnet-sphene; and 6) blue tourmaline. The possible source rocks corresponding to each assemblage are 1) granitic rocks; 2) metamorphic rocks (schist and gneiss) ; 3) older sedimentary rocks; 4) andesitic rocks; 5) metamorphosed impure limestone; and 6) pegmatite, respectively. Previous paleocurrent data suggest that the sediments of the study area were mainly derived from the northeastern to southeastern directions. Thus, the most possible source areas would be the east extension part of the sobaegsan metamorphic complex to the northeast and the Cheongsong Ridge to the southeast.

경상분지 북동부 안동단층 동단부의 길안지역에는 배악기 하양층군에 속하는 일직층, 후평동층, 점곡층과 사곡층이 분포하고 있다. 연구지역 사암의 기원암을 규명하기 위하여 일직층, 후평동층과 점곡층 사암에서 분리한 중광물을 해석하였다. 그 중광물 중 불투명광물은 적철석, 일메나이트, 류콕신, 갈철석, 자철석 및 황철석 등이고, 투명광물은 양기석, 홍주석, 인회석, 휘석, 흑운모, 금홍석, 스핀, 스피넬, 십자석, 전기석 및 저콘 등이다. 밀접하게 수반되고 기원암지시에 민감한 중광물들끼리 묶으면, 6개의 중광물군으로 구분된다. 1) 인회석-녹색전기석-스핀-무색/황색 저콘, 2) 무색 석류석-녹염석-금홍석-갈색 전기석, 3) 원마된 자색 저콘-원마된 전기석-원마된 금홍석, 4) 휘석-각섬석-무색저콘, 5) 녹염석-석류석-스핀, 6) 청색전기석 등이다. 각 중광물군이 지시하는 기원암은 1) 화강암질암, 2) 변성암류 (편암 및 편마암), 3) 고기 퇴적암류, 4) 안산암류, 5) 변성석회암 및 6) 페그마타이트질암 등으로 해석된다. 고수류에 관한 기존연구자료에 따르면, 퇴적물이 주로 북동부 및 남서부에 위치하였던 기원암으로부터 공급되었음을 지시하므로, 본역 하양층군의 가장 가능한 기원암은 북동부에 분포한 소백산 변성암 복합체와 남동부에 분포한 청송융기부를 이루는 화강암질 및 화산암류로 해석된다.

Keywords

References

  1. Developments in Sedimentary Provenance Studies: Geological SocieRy of London Special Publication v.57 Provenance characteristics of detrital opaque Fe-Ti oxide minerals Basu, A;Molinaroli, E;Moron, A.C.(ed);todd, S. P.(ed);Haughton P.D.W(ed)
  2. Journal of Geological Society of Korea v.6 Geology of Upper Mesozoic Strata in North Gyeongsang Province Chang, K. H.
  3. Journal of Geological Society of Korea v.11 Cretaceous stratigraphy of Southeast Korea Chang, K. H.
  4. Journal of Geological Society of Korea v.24 Cretaceous stratigraphy and paleocurrent analysis of Kyongsang Basin, Korea Chang, K. H.
  5. Journal of Geological Society of Korea v.4 Cretaceous paleocurrent and sedimentation in northwestern part of Gyeongsang Basin Chang, K. H.;Kim, H. M.
  6. Korea Research Institute of Geoscience and Mineral Resources Geological map of Korea(1:50,000):Gusandong Sheet Chang, k. H.;Koh, I. S.;Lee, J. Y.;Kim, S. W.
  7. Korea Research Institute of Geoscience and Mineral Resources Geological map of Korea(1:50,000): Cheongi Sheet. Chang, . H.;Koh, I. S.;Park, H. I.;Chi, J. M.;Kim, H. M.
  8. Journal of Sedimentary Petrology v.57 Variation in ilmenite element composition within and among drainage basins: implications ofr provenance Darby, D. A.;Tsang, Y. W.
  9. Procedures in Sedimentary Petrology Analysis of heavy mineral assemblages hubert, J. F.
  10. Laboratory Handbook of Petrographic Technoques Hutchison, C. S.
  11. Geological Survey of Korea Geological Map of Korea (1:50,000): Jungpyeongdong Sheet Kim, N. j.;Kang, P. J.;Lee, H. K
  12. Ph. D. thesis, Seoul National University Sedimentary Petrology of Sandstones of the Nagdong Group oh, I. S
  13. Journal of Geological Society of Korea v.29 Sedimentary petrology of Cretaceous sandstones in the southern margin of Euiseong Subbasin Koh, I. S.;Lee, Y. T.
  14. Korean Journal of Petroleum Geology v.4 Paleocurrent analysis of the Cretaceous Hayang Group in the northeastern part of Euiseong subbasin, Southeast Korea Koh, I. S.;Lee, Y. T.;Shin, Y. S.
  15. Journal of Geology v.54 The tourmaline group in sediments Krynine, P. D.
  16. Ph. D. thesis, Kyungpook National University Sedimentology and etrology of Cretaceous Sandstones in the Northeastern part of Kyongsang Basin, Southeast Korea Lee, Y. T.
  17. Journal of Sedimentary Petrology v.20 Removal of iron oxide coating from mineral grains Leith, C. J.
  18. Clay Minerals v.19 Stability of detrital heavy minerals in Tertiary sandstones from the North Sea Basin;Clay minerals in Tertiary sandstones from the North Sea Basin Morton, A. C.
  19. Clay minerals v.21 Dissolution of apatite in North Sea, Jurassic sandstones: Implication for the generation of secondary porosity Morton, A. C.
  20. heavy Minerals in Color Mange, M. A;Maurer, H. F. W.
  21. Mimoir of the Geological Society of Japan v.41 Relationship between sedimentary basins on the shelf area in the East China Sea and the Central Kyushu Rift Valley Okada, H.
  22. Paleogeography, Paleoclimatology, Paleoecology v.105 Nature and development of Late Mesozoic and Early Cenozoic sedimentary basins in Southwest Japan Okada, H.;Dakai, T.
  23. Research Review of Kyungpook National University v.24 Type of fracturing at eastern extremity along Andong fault, Central Korea. Park, B. S.
  24. Journal of Sedimentary Petrology v.31 Heavy minerals of the Miocene Harrison formation in northwestern Nebraska Peckham, A. E.
  25. Sand and Sandstone Pettijohn, F. J;Potter, P. E.;Siever, R.
  26. Journal of Sedimentary Research v.A65 Detrital opaque oxides as provenance indicators in river Nile sediments Schneiderman, j. S.
  27. A heavy mineral study of the sediments in some university Simpson, G. S.
  28. Ph. D. thesis, Seoul National University Sedimentology of the Jinju and Iljug formations of the Cretaceous Gyeongsang Supergroup in the Gunwi area, GyeongsangbukDo, Korea. Son, J. D.
  29. Paleogeographic reconstruction and origion of the Philippine Sea v.102 Seno, T.;Maruyama, S.
  30. Mineograph v.5 Granite pebbles of the Paleozoic and Mesozoic formation in Japan: Their synthetic study of the Late Mesozoic of Japan Tomita, T.;Karatida, Y.
  31. M. Sc. thesis. Kyungpook National University Cretaceous Stratigraphy and sedimentation in Pyonghae-Yongdok Area, Kyongsangbuk-Do, Korea. Woo, B. G.
  32. Journal of Southeast Asian Earth Science v.3 An outline of Pre-Jurassic tectonic framework in the east Asia Xu, J.;Tong, W.;Zhu, G.;Lin, S.;Ma, G.