옥천습곡대 서남부지역에 분포하는 쥬라기 화강암류의 석영내 아문미세균열 및 유체포유물을 이용한 고응력장 = Paleostress from Healed Microcracks and Fluid Inclusions in Quartz of the Jurassic Granites in the Southwestern Ogcheon Folded Belt

다국어 초록 (Multilingual Abstract)

Paleostress was interpreted by analyzing the healed microcracks and the secondary fluid inclusions in quartz of the Jurassic granites distributed in the southwestern Ogcheon Folded Belt, South Korea. The most dominant direction of healed microcracks in the study area was oriented N30˚W, and N70˚W direction was also recognized. The formation temperatures of fluid inclusions were ranged 380˚ - 550˚C and the age of healed microcrack formations might have been approximately 166 - 200 Ma. Comparing the paleostress orientation obtained from the direction of healed microcracks to the formation age of healed microcracks estimated from the secondary fluid inclusions, it is considered that granitic rock body in study area was subject to a maximum horizontal principal stress along the NNW-SSE and WNW-ESE directions in the early Jurassic to middle Jurassic.

국문 초록 (Abstract)

옥천습곡대의 서남부지역에서 분포하는 쥬라기 화강암류의 석영내에 존재하는 아문 미세균열과 유체포유물을 분석하여 이 지역에 작용한 고응력장을 해석하였다. 연구지역에서 나타나는 아문 미세균열의 방향성은 전체적으로 N30˚W의 방향이 가장 우세하며 N70˚W의 방향도 나타난다. 연구지역의 아문 미세균열 생성온도는 380˚ - 550˚C 범위를 보이며, 이들 아문 미세균열은 약 166 - 200 Ma의 기간 동안 형성되었을 것으로 추정된다. 아문 미세균열의 방향성을 통한 고응력장의 작용 방향과 유체포유물에 의한 아문 미세균열의 형성시기를 비교하여 볼 때, 연구지역 내에서 발달하는 화강암질암체는 NNW-SSE와 WNW-ESE 방향의 최대수평주응력인 고응력장이 쥬라기 초기에서 쥬라기 중기 기간 동안 작용하였을 것으로 사료된다.

참고문헌 (Reference)

1 김종환, "화산원 천열수성광상탐사 및 모델정립(3)" 과학기술처 209-, 1993

2 김용준, "호남전단대내에 분포하는 엽리상화강암류의 지질시대와 생성과정에 관한 연구" 27 : 247-261, 1994

3 김용준, "장수-운봉지역에 분포하는 화성암류와 화성활동에 관한 연구" 24 : 111-131, 1988

4 장보안, "월악산, 속리산 일대의 화강암체내에 분포하는 아문 미세균열 및 유체포유물에 의한 중생대 백악기 고응력장" 32 : 291-301, 1996

5 장보안, "옥천습곡대 동북부 지역의 화강암체내에 분포하는 아문 미세균열에 의한 중생대 고응력장" 한국과학재단 22-54, 1995

6 김용준, "영남육괴에 분포하는 고기 화가암질류의 지질연대와 성인에 대한 연구" 19 : 151-161, 1986

7 주승환, "영남육괴 Rb-Sr 연대측정연구(III)" 한국동력자원연구소 28-, 1986

8 정해식, "소백산 육괴 동북부 영주 화강암 내의 아문 미세균열 및 유체포유물을 이용한 중생대 고응력장 연구" 대한지질학회 40 (40): 179-190, 2004

9 김정빈, "담양-진안 사이에 분포하는 엽리상화강암류에 대한 지질시대와 성인에 관한 연구" 23 : 233-244, 1990

10 김정빈, "담양-진안 사이에 분포하는 심성 화성암류에 대한 암석화학과 성인" 전남대학교 1990

11 김옥준, "남한의 신기화강암류의 관입시기와 지각변동" 4 : 1-10, 1971

12 강필종, "남한 인공위성 영상의 지질학적 분석" 15 : 181-191, 1979

13 김용준, "나주-해남 지역에 분포하는 화성암류의 암석화학" 14 : 300-515, 1993

14 김용준, "나주-영암-목포 지역에 분포하는 화성암류의 암석화학과 화성활동에 관한 연구" 16 : 442-461, 1995

15 주승환, "광주 화강암의 Rb-Sr 연대측정연구(IV)" 한국동력자원연구소 52-, 1990

16 Turek, A, "U-Pb zircon ages of Mesozoic plutons in the Damyang-Geochang area, Ryeongnam massif, Korea" 29 : 243-258, 1995

17 Homand-Etienne, F, "Thermally induced microcracking in granites: Characterization and analysis" 26 : 125-134, 1989

18 Nur, A, "The origin of small cracks in igneous rocks" 7 : 307-314, 1970

19 Yanai, S., "The Honam Shear Zone (South Korea): Deformation and tectonic implication in the Far East" University of Tokyo 35 : 181-210, 1985

20 Korea Institute of Geoscience and Mineral Resources, "Tectonic map of Korea" Korea Institute of Geo science and Mineral Resources 2001

21 Chough, S.K., "Tectonic and sedimentary evolution of the Korean peninsula: A review and new view" 52 : 175-235, 2000

22 Tuttle, O.F., "Structural petrology of planes of liquid inclusions" 57 : 331-356, 1949

23 Koh, H.J., "Structural analysis and tectonic evolution of the Ogcheon supergroup, Goesan, central part of the Ogcheon belt, Korea" Seoul National University 1995

24 Pêcher, A., "Relations between fluid inclusion trails and regional stress field: A tool for fluid chronology-an example of an intragranitic uranium ore deposit (northwest Massif Central, France)" 18 : 229-237, 1985

25 Potter II, R.W., "Pressure corrections for fluid-inclusion homogenization temperature based on the volumetric properties of the system NaCl-H2O" 5 : 603-607, 1977

26 Jang, B.A., "Precambrian paleostress from microcracks and fluid inclusions in the Wolf River batholith of central Wisconsin" 101 : 1457-1464, 1989

27 Kim, J.M., "Paleostress reconstructions based on calcite twins in the Joseon Supergroup, northeastern Ogcheon Belt (South Korea)" 17 : 57-69, 2008

28 Ren, X., "Paleostress history of the Basin and Range province in western Utah and eastern Nevada from healed microfracture orientations in granites" 17 : 487-490, 1989

29 Laubach, S.E., "Paleostress directions from the preferred orientation of fluid-inclusion planes (healed microfractures) in sandstone, East Texas basin" 11 : 603-611, 1989

30 Brown, P.E, "P-V-T properties of fluids in the implications of fluid inclusion studies" 53 : 1209-1221, 1989

31 Plumb, R., "Near-surface in situ stress: 3. Correlation with microcrack fabric within the New Hampshire granite" 89 : 9350-9364, 1984

32 Fredrich, J.T, "Micromechanics of Thermally induced cracking in three crustal rocks" 91 : 12743-12764, 1986

33 Jang, B.A, "Micromechanical modeling of healed microcrack orientations as a paleostress indicator: Application to Precambrian granite from Illinois and Wisconsin" 96 : 19655-19664, 1991

34 Lespinasse, M, "Microfracturing and regional stress field: A study of the preferred orientations of fluid-inclusion planes in a granite from the Massif Central, France" 8 : 169-180, 1986

35 Kranz, R.L., "Microcracks in rocks: A review" 100 : 449-480, 1983

36 Simmons, G, "Microcracks in rocks. In The physics and chemistry of minerals and rocks" Wiley-Interscience 105-137, 1976

37 Ingerson, E., "Liquid inclusions in geologic thermometry" 32 : 375-388, 1947

38 Brantley, S.L., "Healing in microcracks in quartz: Implications for fluid flow" 18 : 136-139, 1990

39 Kowallis, B.J., "Healed microcrack orientations in granite from Illinois borehole UPH-3 and their relationship to the rock's stress history" 135 : 297-306, 1987

40 Jin, M.S., "Geochronology and cooling history of the Mesozoic granite plutons in the central part of the Ogcheon Fold Belt, South Korea" 4 : 153-167, 1995

41 Shelton, K.L, "Formation of synthetic fluid inclusions in natural quartz" 65 : 1233-1236, 1980

42 Roedder, E., "Fluid inclusions: Reviews in mineralogy" Mineralogical Society of America 644-, 1984

43 Norton, D.L., "Fluid and heat transport phenomena typical of copper-bearing pluton environments. In Advances in geology of the Porphyry Copper Deposit: Tucson" Tucson, University of Arizona Press 59-72, 1982

44 Smith, D.L, "Diffusional crack healing in quartz" 89 : 4125-4135, 1984

45 Knapp, R.B, "Differential thermal expansion of pore fluids: Fracture propagation and microearthquake production in hot pluton environments" 82 : 2515-2522, 1977

46 Mawer, C.K, "Crystalline rocks as possible paleoseismicity indicators" 13 : 100-102, 1985

47 Dodson, M.H., "Closure temperature in cooling geochronological and petrological systems" 40 : 259-274, 1973

48 최범영, "1:250,000 목포·여수 도폭 지질보고서" 한국지질자원연구원 45-, 2002