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월악산북측(月岳山北側) 고운리층(古雲里層) 방해석(方解石) 쌍정(雙晶)을 이용(利用)한 추정차응력(推定差應力) 분석(分析)
임명혁,김영엄,장태우,Ihm, Myeong Hyeok,Kim, Young Eom,Chang, Tae Woo 대한자원환경지질학회 1991 자원환경지질 Vol.24 No.2
Ogchon Supergroup directly contacts with Choseon Supergroup in the northern area of Worak-san, where evidences indicating thrust-fault formed during $D_2$-deformation are observed. On footwall of thrust fault, calcite veins in Gounri Formation belonging to Choson Supergroup may be deformed during thrust faulting($D_2$). Calcite veins are parallel to axial plane cleavage($S_2$) of $F_2$ fold and truncate slaty cleavage($S_1$). Therefore, we can use deformation twins in calcite grains of the veins as a marker for inferred differential stress operated upon thrust faulting. The inferred differential stresses are estimated at 190 Mpa from K, sample. The stress from K, sample close to the contact between Ogchon Supergroup and Choseon Supergroup shows a higher value than $K_2$-$K_6$ samples, probably having an important influence upon thrust faulting. The differential stress reveal again high value at $K_7$ sample, which may suggest the presence of another thrust fault.
月岳山北側 古雲里層 方解石 雙晶을 利用한 推定差應力 分析
Myeong Hyeok Ihm(任明赫),Young Eom Kim(金英嚴),Tae Woo Chang(張泰雨) 대한자원환경지질학회 1991 자원환경지질 Vol.24 No.2
Ogchon Supergroup directly contacts with Choseon Supergroup in the northern area of Worak-san, where evidences indicating thrust-fault formed during D₂-deformation are observed. On footwall of thrust fault, calcite veins in Gounri Formation belonging to Choson Supergroup may be deformed during thrust faulting(D₂). Calcite veins are parallel to axial plane cleavage(S₂) of F₂ fold and truncate slaty cleavage(S₁). Therefore, we can use deformation twins in calcite grains of the veins as a marker for inferred differential stress operated upon thrust faulting. The inferred differential stresses are estimated at 190 Mpa from K₁ sample. The stress from K₁ sample close to the contact between Ogchon Supergroup and Choseon Supergroup shows a higher value than K₂-K₆ samples, probably having an important influence upon thrust faulting. The differential stress reveal again high value at K₇ sample, which may suggest the presence of another thrust fault.