Chwae, Ueechan

Recent regional geological mapping data, coupled with structural, petrological and geochronological data on the so-called Imjingang Fold Belt (IFB) along the demilitarized zone (DMZ) in the central Korean Peninsula have revealed that : (1) the IFB does not extend eastwards across the NNE-trending Jookgaryeong fault, (2) ultrahigh pressure minerals such as coesite or diamond characterizing the Dabie-Sulu metamorphic rocks in east China have not been found from metamorphic rocks in the IFB, (3) Chemical Th-U-total Pb Isochron Method (CHIME), Sm-Nd and K-Ar age data show that the ca.250 Ma thermal event took place extensively in the Korean Peninsula and the event is not restricted to the IFB but is common in the Gyeonggi massif, Yongnam massif and Ogcheon belt, (4) the distribution of the Upper Devonian to Lower Carboniferous Imjin System is narrower than that has been thought, and much of the Imjin System should be substituted by the Middle Proterozoic Yeoncheon Group, (5) the Haeju-Wonsan fault (HWFT) is an important tectonic line, dividing the structural trend of the basement gneisses in the Korean Peninsula and the HWFT corresponds to the northern boundary of the IFB to the west of the Jookgaryeong fault, and (6) since the ductile shear zone in the Proterozoic Yeoncheon Group is restricted within the IFB, the IFB is better to be called the Imjingang shear zone. The results of this study do not support the previous tectonic models that the IFB in the central Korean Peninsula is an eastern extension of the Quinling-Dabie-Sulu collisional belt in China. Thus, to better understand the tectonic evolution of East Asia, a re-examination of the IFB itself as well as other tectonic provinces in the Korean Peninsula is necessary.国立情報学研究所で電子化したコンテンツを使用している

Does the Imjingang Fold Belt cross the mid-Korean Peninsula along the demilitarized zone (DMZ) as an extension of the Sulu Belt, China ?

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