http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
강원도(江原道) 임계지역(臨溪地域)의 지질구조(地質構造)
김정환,기원서,Kim, Jeong Hwan,Kee, Weon Seo 대한자원환경지질학회 1991 자원환경지질 Vol.24 No.1
The Imgye area, in the NE Taebaegsan Region, consists of Precambrian granites and schist complex at the base and Paleozoic sedimentary rocks and amphibolite at cover. The granites in the area were previously thought to be Paleozoic in age, but recent geochronological data yields isotopic age ranging from $1837{\pm}82Ma$ to $2108{\pm}82Ma$ by Rb-Sr whole rock method. Therefore, basement-cover relations in the area should be reexamined. During the study, mylonite zone recognized along the contact boundary between Precambrian granites and Cambrian Jangsan Quartzite Formation. Mylonite zone has 150 - 250 m in width. Mylonitic rocks can divide into two groups; quartz mylonite derived from Jangsan Formation and mylonitic granites from Precambrian granites. Intensity of mylonitic foliation decreased toward the north. Amphibolite occurs as an intrusive sills within mylonite zone. Mineral fabrics and small scale shear zones are commonly seen in amphibolite. It indicates that intrusive age of amphibolite is synchronous to the formation of mylonite zone. Mylonite zone was reactivated as ductile thrust faults and forms the hinterland dipping imbricate zone during the Cretaceous Bulkuksa Orogeny. The near parallelism of mineral stretching lineation and long axis of strain ellipes indicates that the area is affected by a homogeneous pure shear flattening together with the variable components of simple shear.
김정환,고희재,기원서,Kim, Jeong Hwan,Koh, Hee Jae,Kee, Weon Seo 대한자원환경지질학회 1989 자원환경지질 Vol.22 No.3
The Okdong Fault is situated in Okdong-Hamchang area, the central part of Korea. The area consists of Precambrian gneisses and granitoids, Paleozoic clastic and carbonate rocks, and Mesozoic clastic rocks and igneous intrusives. The Okdong Fault is situated along contact boundary between the lowermost Cambrian Basal Quartzite and Precambrian basements. Mylonites occur as narrow zone which is extended over 100km and is restricted to within 10m-30m along the Okdong Fault. The main features of mylonites are quartz mylonite derived from Cambrian Basal Quartzite and mylonitic granitoids from Precambrian granitoids. Movement sense is deduced as a sinistral strike-slip movement with evidence of rotation of sheared porphyroclasts, rotation of fragments and S/C-bands. The mylonite zone has been reactivated as fault which reveals oblique-slip movement. The fault resurges as faults which reveals normal(to the NW) and reverse(to the SE) dip-slip movement. Normal faults are dominant in the northern and southern part and reverse or thrust faults are dominant in the central part of the Okdong Fault. The thrust movement can be correlated with the Daebo Orogeny of Jurassic Period. Granites and dyke rocks intruded into Paleozoic and Precambrian rocks during Cretaceous Period.