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목차

1. 서언 15

2. 구산동응회암 18

3. 연구방법 23

3.1. 대자율이방성(AMS) 23

3.2. 역미세구조(inverse fabric) 29

3.3. 실험방법 33

4. 분석결과 37

4.1. 열처리에 따른 AMS 변화 37

4.1.1. 열처리 전 결과 37

4.1.2. KT11B 39

4.1.3. KT11M 48

4.1.4. KT18B 57

4.1.5. KT18M 65

4.1.6. 열처리에 따른 AMS 변화의 유형 분류 75

4.2. 열처리에 따른 AARM 변화 83

4.2.1. 유형별 AMS와 AARM 비교 83

4.2.2. 지점별 AMS와 AARM 비교 84

4.3. 열처리에 따른 자성광물 변화 92

4.3.1. Type-0 92

4.3.2. Type I 94

4.3.3. Type II 102

4.3.4. Type III 105

4.3.5. 자기구역 분석 110

4.4. EMPA 분석결과 113

4.5. 골격입자 분석 115

5. 토의 119

5.1. 자기미세구조(AMS) 변화 유형 119

5.2. 자성광물의 변화와 Thermal enhancement 효과 125

6. 결론 128

참고문헌 130

Abstract 137

표목차

Table. 1. AMS data during a stepwise thermal treatment in the KT11B. 45

Table. 2. AMS data during a stepwise thermal treatment in the KT11M. 54

Table. 3. AMS data during a stepwise thermal treatment in the KT18B. 62

Table. 4. AMS data during a stepwise thermal treatment in the KT18M. 72

Table. 5. Summary of AMS axes change and patterns and parameters. 82

그림목차

Fig. 1. (A) Distribution map of the Cretaceous basin in South Korea. (B)... 21

Fig. 2. Photographs of outcrop and slab at the SKT (A~C), the NKT (D~F)... 22

Fig. 3. Principle of the AMS method. (A) A rock fabric represented by an... 26

Fig. 4. Principles of the AMS application for revealing rock fabrics. (A)... 27

Fig. 5. PJ-T and L-F diagram interpreting degree of the anisotropy and...[이미지참조] 28

Fig. 6. Relationship between the rock fabric and the magnetic fabric in... 31

Fig. 7. Theoretical model about mixing of normal and inverse fabric. (A)... 32

Fig. 8. Process of remanent magnetization acquisition. Red line is direct field. 35

Fig. 9. (A) Kappabridge KLY-4S, CS-3, and CS-L used in AMS and... 36

Fig. 10. Untreated AMS results of selected 4 sites (KT11B, KT11M, KT18B,... 38

Fig. 11. A result of thermal AMS in the KT11B site. The direction of AMS... 40

Fig. 12. A result of thermal AMS in the KT11B site. The direction of AMS... 41

Fig. 13. A result of thermal AMS in the KT11B site. The direction of AMS... 42

Fig. 14. A result of thermal AMS in the KT11B site. The direction of AMS... 43

Fig. 15. Assemblage of the AMS principal axes direction change at each... 46

Fig. 16. Assemblage of the AMS parameters((A) PJ and T. (B) km) change...[이미지참조] 47

Fig. 17. A result of thermal AMS in the KT11M site. The direction of AMS... 50

Fig. 18. A result of thermal AMS in the KT11M site. The direction of AMS... 51

Fig. 19. A result of thermal AMS in the KT11M site. The direction of AMS... 52

Fig. 20. Assemblage of the AMS principal axes direction change at each... 55

Fig. 21. Assemblage of the AMS parameters((A) PJ and T. (B) km) change...[이미지참조] 56

Fig. 22. A result of thermal AMS in the KT18B site. The direction of AMS... 58

Fig. 23. A result of thermal AMS in the KT18B site. The direction of AMS... 59

Fig. 24. A result of thermal AMS in the KT18B site. The direction of AMS... 60

Fig. 25. Assemblage of the AMS principal axes direction change at each... 63

Fig. 26. Assemblage of the AMS parameters((A) PJ and T. (B) km) change...[이미지참조] 64

Fig. 27. A result of thermal AMS in the KT18M site. The direction of AMS... 67

Fig. 28. A result of thermal AMS in the KT18M site. The direction of AMS... 68

Fig. 29. A result of thermal AMS in the KT18M site. The direction of AMS... 69

Fig. 30. A result of thermal AMS in the KT18M site. The direction of AMS... 70

Fig. 31. Assemblage of the AMS principal axes direction change at each... 73

Fig. 32. Assemblage of the AMS parameters((A) PJ and T. (B) km) change...[이미지참조] 74

Fig. 33. Classification of the AMS change patterns (Type-0 and Type-I)... 80

Fig. 34. Classification of the AMS change patterns (Type-II and Type-III)... 81

Fig. 35. The AARM principal axes change about Type-0 specimens during... 86

Fig. 36. The AARM principal axes change about Type-I specimens during... 87

Fig. 37. The AARM principal axes change about Type-II specimens during... 88

Fig. 38. The AARM principal axes change about Type-III specimens during... 89

Fig. 39. Assemblage of the AARM principal axes direction change at each... 90

Fig. 40. Assemblage of the AARM principal axes direction change at each... 91

Fig. 41. Typical magnetic susceptibility vs. temperature plots (k-T curve)... 96

Fig. 42. Typical hysteresis loops for the Type-0 samples. UT (Untreated) :... 97

Fig. 43. Typical hysteresis loops for the Type-0 samples. UT (Untreated) :... 98

Fig. 44. Typical magnetic susceptibility vs. temperature plots (k-T curve)... 99

Fig. 45. Typical hysteresis loops for the Type-I samples. UT (Untreated) :... 100

Fig. 46. Typical hysteresis loops for the Type-I samples. UT (Untreated) :... 101

Fig. 47. Typical magnetic susceptibility vs. temperature plots (k-T curve)... 103

Fig. 48. Typical hysteresis loops for the Type-II samples. UT (Untreated) :... 104

Fig. 49. Typical magnetic susceptibility vs. temperature plots (k-T curve)... 107

Fig. 50. Typical hysteresis loops for the Type-III samples. UT (Untreated) :... 108

Fig. 51. Typical hysteresis loops for the Type-III samples. UT (Untreated) :... 109

Fig. 52. Hcr /Hc versus Mr /Ms (hysteresis ratios) for samples from the 4... 112

Fig. 53. (A, B) BSE images of magnetic minerals and biotite before... 114

Fig. 54. Representative grain fabrics measured in thin-section and AMS fabrics... 118

Fig. 55. Theoretical model about mixing inverse fabric and normal fabric... 122

Fig. 56. The change patterns of the AMS axes (left) and magnitude... 123

Fig. 57. The change patterns of the AMS axes (left) and magnitude... 124

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