암석학회지 (The Journal of the Petrological Society of Korea)

한국암석학회 (The Petrological Society of Korea)
권호 표지

복운모 화강암의 암석화학적 특징 : 청산, 인제-홍천, 영주 및 남원지역의 예

Petrological Characteristics of Two-Mica Granites : Examples from Cheongsan, Inje-Hongcheon, Yeongju and Namwon areas

  • 좌용주 (경상대학교 자연과학대학 지구환경과학과)
  • 발행 : 1997.12.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

청산, 인제-홍천, 영주 및 남원지역에 분포하는 복운모 화강암은 과알루미나질이며, 일반적으로 S-타입 및 티탄철석계열의 화강암류임을 나타내어, 지각물질로부터 유래된 마그마가 환원 환경에서 관입.고결하여 생성된 것이다. 인제-홍천과 남원 지역의 복운모 화강암은 각각 반상 흑운모 화강암과 높은 Ti/Mg 비의 흑운모 화강암으로부터 분화.파생된 잔류 마그마로부터 형성되었다. 청산과 영주지역의 복운모 화강암은 접촉하고 있는 반상 흑운모 화강암과, 화강섬록암과는 각각 성인적인 관련이 없을 것으로 판단된다. 남원과 영주지역 복운모 화강암은 비교적 물에 포화된 마그마로부터 형성되었고, 청산과 인제-홍천지역 복운모 화강암질 마그마는 물에 불포화 되었음이 나타난다. 한편, 물에 포화되었던 남원지역의 흑운모 화강암과 복운모 화강암에 있어 마그마 내의 물의 함량은 5.8wt.%이상으로 추정되고, 영주 목운모 화강암질 마그마의 경우 2.4~5.8wt.%정도의 물을 포함했을 것으로 생각할 수 있다. 인제-홍천과 영주지역의 복운모 화강암의 최소융해액 조성으로 구해지는 압력 (0.5~2kb)과 세립질 내지 극세립질의 암석 조직은 화강암질 마그마가 지각의 얕은 곳에서 관입.배태된 양상을 나타내며, 청산과 남원지역의 복운모 화강암의 경우 최소융해액 조성 압력(2~3 kb)과 세립~중립질 내지 조립질의 암석 조직으로부터 비교적 지하 심부에 관입.배태외었음을 알 수 있다. 화강암질 마그마의 고상선/백운모의 안정선의 교점으로부터 물에 포화된 마그마에서는 최소한 약 1.6kb (약 6km)이상의 압력에서 마그마기원의 1차 백운모가 정출될 수 있으며, 그 이하에서는 고상선 아래에서 교대작용으로 2차적인 백운모가 형성된다. 반면, 물에 불포화된 마그마에서 1차 백운모가 정출되기 위해서는 보다 놓은 압력이 요구된다. 백운모 형성에 대한 이 조건은 각 지역 복운모 화강암에 산출되는 백운모에 1차 백운모와 2차 백운모 양쪽이 나타남을 설명하기에 충분하다. 한편, 실험으로 구해진 백운모의 안정선의 적용에는 주의가 필요하고, 특히 순수한 합성 백운모 단성분을 이용한 실험의 경우 팔면체 배위에 Ti, Fe, Mg의 성분이 첨가됨에 따라 안정선이 높은 온도 영역으로 이동됨을 고려해야 한다.

From their general natures of peraluminous, S-type and ilmenite-series granites, two-mica granites in the Cheongsan, Inje-Hongcheon, Yeongju and Namwon areas were originated from crust-derived granitic magma and solidified under reducing condition. Each two-mica granite in Inje-Hongcheon and Namwon districts was differentiated from the the residual magma of porphyric biotite granite and high Ti/Mg biotite granite, respectively. The genetic relationships between two-mica granite and porphyritic biotite granite in Chenongsan district and between two-mica granite and biotite granodiorite in Yeongju district are ambiguous. In Namwon district granitic magmas were water-saturated and possible water solubilities in magmas were more than 5.8wt.%. In Yeongju district two-mica granitic magma was nearly water-saturated and showed possible water solubilities between 2.4~5.8wt.%. Two-mica granitic magmas in Cheongsan and Inje-Hongcheon districts were water-undersaturated. Pressure-dependent minimum melt compositions (0.5~2kb) and petrographic textures of two-mica granites in Inje-Hongcheon and Yeongju districts represent that the granites intruded and solidified at shallow level, whereas those in Cheongsan and Namwon districts exhibit relatively deeper level of granitic intrusion (2-3kb). The intersection of granite-solidus/muscovite stability indicates that magmatic primary muscovite can be crystallized from the water-saturated magma above 1.6kb (ca. 6km), but below the pressure muscovite can be formed by the subsolidus reaction. On the other hand, more pressure would be necessary for the crystallization of primary muscovite from the water-undersaturated magma. This pressure condition can explain the occurrence of primary and secondary muscovites from the two-mica granites in the areas considered. The experimental muscovite stability must be cautious of the application to examine the origin of muscovite. The muscovite stability can move toward high temperature field with adding of Ti, Fe and Mg components to the octahedral site of pure muscovite end member.

키워드

참고문헌

  1. 암석학회지 v.6 청산일대에 분포하는 화강암류의 광물조성과 주성분원소 지구화학 사공회;좌용주
  2. 지질학회지 v.30 남한의 중생대 화강암에 대한 각섬석 지압계와 지각두께의 진화 조등룡;권성택
  3. 암석학회지 v.4 연천-전곡 지역에 분포하는 임진강대의 고압 각섬암 조문섭;권성택;이진한;Nakamura, E.
  4. 연세대학교 박사논문 남원 화강암질암의 광물학적 및 암석지화학적 연구 홍세선
  5. 지질학회지 v.24 no.특별호 남원지역에 분포하는 남원화강암체에 대한 암석지화학적 연구 홍세선;김용준;김정빈
  6. Canadian Mineral. v.17 Hypothetical liquidus relationships in the subsystem $Al_2O_3-FeO-MgO$ projected from quartz, alkali feldspar and plagioclase for a$(H_2O)$≤1 Abbott, R.N.,Jr.;Clarke, D.B.
  7. Canadian Mineral. v.19 Synkinematic intrusion of peraluminous and associated metaluminous granitic magmas, Whipple Mountains, California Anderson, J.L.;Rowley, M.C.
  8. Glossary of Geology(3rd ed.) Bates, R.L.;Jackson, J.A.
  9. J. Geol. v.76 Melting of granite with excess water to 30 kbars pressure Boettcher, A.L.;Wyllie, P.J.
  10. Contrib. Mineral. Petrol. v.48 Thermal stability and standard thermodynamic properties of synthetic 2M₁-muscovite, $KAl_2[AlSi_3O_{10}(OH)_2} Chatterjee, N.D.;Johannes, W.
  11. Am. Mineral. v.49 Crystalline solubility in the muscovite and phlogopite groups Crowley, M.S.;Roy, R.
  12. J. Petrol. Soc. Korea v.32 Petrography and mineral chemistry of the granitic rocks in Poeun-Sogrisan Area, Korea Cho, W.S.;Jwa, Y.-J.;Lee, J.I.;Lee, M.S.
  13. Canadian Mineral. v.19 The mineralogy of peraluminous pranites : a review Clarke, D.B.
  14. J. Geol. v.90 Estimating the $P-T-X_{H2O}$ conditions during crystallization of low calcium granites Day, H.W.;Fenn, P.M.
  15. An introduction to the rock-forming minerals(2nd ed.) Deer, W.A.;Howie, R.A.;Zussman, J.
  16. Contrib. Mineral. Petrol. v.106 Beginning of melting and composition of first melts in the system $Qz-Ab-Or-H_2O-CO_2$ Ebadi, A.;Johannes, W.
  17. Am. J. Sci. v.263 Application of a reaction rate method to the breakdown equilibria of muscovite and muscovite plus quartz Evans, B.W.
  18. Am. Mineral. v.80 Water solubility in haplogranitic melts. Composition, pressure and temperature dependence Holtz, F.;behrens, H.;Dingwell, D.B.;Johannes, W.
  19. Am. Mineral. v.77 Effects of $H_2O$ on liquidus phase relations in the haplogranite system at 2 and 5 kbar Holtz, F.;Pichavant, M.;Barbey, P.;Johannes, W.
  20. Contrib. Mineral. Petrol. v.42 melting relations of muscovite-granite to 35 kbar as a model for fusion of metamorphosed subducted oceanic sediments Huang, W.L.;Wyllie, P.J.
  21. Am. J. Sci. v.274 Melting relations of muscovite with quartz and sanicine in the $K_2O-Al_2O_3-SiO_2-H_2O$ system to 30 kilobars and an outline of pargonite melting relations Huang, W.L.;Wyllie, P.J.
  22. J. Geol. v.83 Melting relations in the system of $NaAlSi_3O_8-KAlSi_3O_8-SiO_2$ to 35 kilobars, dry and with excess water Huang, W.L.;Wyllie, P.J.
  23. Can. J. Earth Sci. v.8 A guide to the chemical classification of the common volcanic rocks Irvine, T.N.;Baragar, W.R.A.
  24. Mining Geol. v.27 The magnetite-series and ilmenite-series granitic rocks Ishihara, S.
  25. Petrogenesis and experimental petrology of granitic rocks Johannes, W.;Holtz, F.
  26. J. Min. Pet. Econ. geol. v.85 Petrography and major element geochemistry of the granitic rocks in the Inje-Hongcheon district, South Korea Jwa, Y.-J.
  27. J. Geol. Soc. Korea v.27 A study on Jurassic granitic rocks in the Inje-Hongcheon district, South Korea. Ⅱ. Effect of wallrock assimilation Jwa, Y.-J.
  28. J. Geol. Soc. Korea v.26 A study on Jurassic granitic rocks in the Inje-Hongcheon district, South Korea Jwa, Y.-J.;Moutte, J.
  29. Geochem. J. v.24 Geochronology and cooling history of Mesozoic granitic rocks in the Inje-Hongcheon district, South Korea Jwa, Y.-J.;Nakajima, T.;Uchiumi, S.;Shibata, K.
  30. J. Geophys. Res. v.86 Petrogenesis of garnet two-mica granites in the Ruby Mountains, Nevada Kistler, R. W.;Ghent, E. D.;O'Neil, J.R.
  31. J. Petrol. Soc. Korea v.2 Contrasting $TiO_2/MgO$ ratios in the Namwon granitic complex Kwon, S.-T.;Hong, S.-S.
  32. Phys. Earth Planet. Int. v.3 Melting in the deep crust and upper mantle and the nature of the low velocity zone Lambert, I.B.;Wyllie, P.J.
  33. Am. J. Sci. v.267 Melting reactions in the system $KAlSi_3O_8-SiO_2-H_2O$ to 18.5 kilobars Lambert, I.B.;Robertson, J.K.;Wyllie, P.J.
  34. J. Geophys. Res. v.86 Two-mica Granites of Northeastern Nevada Lee, D.E.;Kistler, R.W.;Friedman, I.;Loenen, R.E.
  35. J. Geol. Soc. Korea v.27 Mineralogy and petrology on the granitic rocks in the Youngju area, Kyoungsang Buk-Do, Korea Lee, J.I.;Lee, M.S.
  36. Korea Soc. Econ. Environ. Geol. 30th Annual Meeting Abst. New radiometric ages of the granitic rocks in the Yeongnam Massif Lee, J.I.;Jwa, Y.-J.;Kagami, H.;Uchiumi, S.
  37. J. Geophys. Res. v.69 The granitic system at pressure of 4 to 10 kilobars Luth, W.C.;Jahns, R.H.;Tuttle, O.F.
  38. Contrib. Mineral. Petrol. v.76 The effect of fluorine on liquidus phase relationships in the system Qz-Ab-Or with excess water at 1 kbar Manning, D.A.C.
  39. J. Geol. v.78 Melting relations in the system $NaAlSi_3O_8-KAlSi_3O_8-SiO_2-H_2O$ to 20 kilobars compared with results for other feldspar-quartz-$H_2O$ and rock-$H_2O$ systems Merill, R.B.;Robertson, J.K.;Wyllie, P.J.
  40. Canadian Mineral. v.19 Composition of plutonic muscovite: genetic implications Miller, C.F.;Stoddard, E.F.;Bradfish, L.J.;Dollase, W.A.
  41. Bull. Mineral. v.107 Generations successives de muscovites et feldspaths potassiques dans les leucogranite du massif de Millevaches (Massif Central francais) Monier, G.;Mergoil-Daniel, J.;Labernardiere, H.
  42. Geol. Soc. Am. Bull. v.82 Wall rock decarbonation and forcible emplacement of Birch Creek pluton, southern White Mountains, California Nelson, C.A.;Sylvester, A.G.
  43. Chemie Erde v.43 Geochemistry of granitic rocks and their micas from the west border of the Alvao Plateau, northern Portugal Neiva, A.M.R.
  44. Phys. Earth Planet. Int. v.35 Petrogenesis of tourmaline granites and topaz granites;the contribution of experimental data Pichavant, M.;Manning, D.A.C.
  45. Chem. Geol. v.96 Phase relations and compositional dependence of $H_2O$ solubility in quartz-feldspar melts Pichavant, M.;Holtz, F.;McMillan, P.
  46. J. Geol. v.76 experimental studies of igneous rock series, Central Sierra Nevada Batholith, California Piwinskii, A.J.
  47. Geology v.24 Possible eastward extension of Chinese collision belt in South Korea : the Imjingang belt Ree, J.-H.;Cho, M.;Kwon, S.-T.;Nakamura, E.
  48. Geology v.19 Magmatically zoned muscovite from the peraluminous two-mica granites of the Leinster batholith, southeast Ireland Roycroft, P.
  49. Micas. Reviews in Mineralogy v.13 Micas in igneous rocks Speer, J.A.;Bailey(ed.)
  50. Neues Jahrb. Mineral. Monatsh. Jahrb. v.5 An experimental determination of the upper stability limit of muscovite+quartz in the range 7-20 kb Storre, B.;Karotke, E.
  51. Contrib. Mineral. Petrol. v.36 Experimental data on melting reactions of muscovite+quartz in the system $K_2O-Al_2O_3-SiO_2-H_2O$ to 20 kb water pressure Storre, B.;Karotke, E.
  52. Geol. Soc. Am. Bull. v.89 Petrology of the Rocklin pluton and associated rocks, western Sierra Nevada, California Swanson, S.E.
  53. Geol. Soc. Am. Bull. v.89 Papoose Flat pluton : a granitic blister in the Inyo Mountains, California Sylvester, A.G.;Oertel, G.;Nelson, C.A.;Christie, J.M.
  54. Mining Geol. v.24 the iron-titanium oxides in the granitic rocks of southwest Japan Tsusue, A.;Ishihara, S.
  55. Annual report of the director of the geophysical laboratory. Year Book No. 52 Tuttl, O.F.;Bowen, N.L.
  56. Geol. Soc. Am. Mem. v.74 Origin of granite in teh light of experimental studies in the system NaAlSi_3O_8-KAlSi_3O_8-SiO_2-H_2O$ Tuttle, O.F.;Bowen, N.L.
  57. Tectonophysics v.43 Ultrametamorphism and granitoid genesis White, A.J.R.;Chappell, B.W.
  58. Geol. Soc. Am. Bull. v.100 The origin of granite: the role and source of water in the evolution of granitic magmas Whitney, J.A.
  59. Petrogenesis of metamorphic rocks(5th ed.) Winkler, H.G.F.
  60. Carnegie Inst. Wash. Yearb. v.66 Albite-anorthite-quartz-water at 5 kbar Yoder, H.S.
  61. Geochim. Cosmochim. Acta v.8 Synthetic and natural muscovites Yoder, H.S.;Eugster, H.P.