Magnetostratigraphic Study for Lower Gyeongsang Super Group

京都大学与延世大学合作研究项目“高丽-义岭地区庆尚下超群磁性地层学研究”于1996年作为海外科研项目实施（Join Research）No.07044306，由教育/科学部资助，庆尚盆地是东亚地区的一个陆相沉积盆地，形成于白垩纪和新近纪。该盆地位于庆尚盆地与日本飞田-山郡-山口地区之间，一直受到日韩地质学家的关注。虽经多次调查，但在沉积时间等问题上存在争议。1996年2月29日至3月19日，在日本和韩国科学家的合作下，在韩国南部地区进行了古地磁样品的野外考察和采集工作。（白垩纪）：52个地点（约260个岩石样品）高灵地区（白垩纪）：56个地点（约280个岩石样本）浦项地区（三级）：40个站点（约400个岩石样本）实验室和总结工作将在京都大学和延世大学进行。详细和仔细的岩石磁性和古地磁研究可能会给出年龄以及采样点的极点位置。通过对庆尚盆地沉积时代、各次盆地地层对比、朝鲜半岛南部白垩纪和第三纪的极移轨迹的研究，可以确定庆尚盆地的沉积时代，并与日本西南部的极移轨迹进行对比。研究结果将为东亚古地磁极移路径、形成时间等提供基础信息。

The cooperative research project-between Kyoto and Yonsei Universities on "Magnetostratigraphic Study for the Lower Gyeongsang Super Group in Goryeong-Uiryeong Area" was carried out in 1996 as the Oversea Scientific Research Project (Join Research) of Japan No. 07044306 financially supported by the Ministry of Education/Science, Sports and Culture of Japan and KOSEF in Korea.The Gyeongsang Basin is a part of non-marine sedimentary basin in East Asia which formed during the Cretaceous and Neogene. The basin, being exposed between the Gyeongsang basin and Hida-Sangun-Yamaguchi area in Japan, has been noticed by the both the Japanese and Korean geologists. Although a number of investigations, there are debeates on such as the times of deposition. This magnetostratigraphic study has been carried out in Gyeongsang Supergroup.Field examination and collection of paleomagnetic samples were made in Southern part of Korea from February 29 to March 19, 1996, in cooperative work with the collaborators of Japanese and Korean scientists, as follows :Jinju Area (Cretaceous) : 52 sites (about 260 rock samples)Goryeong Area (Cretaceous) : 56 sites (about 280 rock samples)Pohang Area (Tertiary) : 40 sites (about 400 rock samples)The laboratory and summarizing works will be done in Kyoto and Yonsei Universities.Detailed and careful rock magnetic and paleomagnetic studies may give the ages and the pole position of the sampling sites. And then, it is clear that the times of deposition, stratigraphic correlations among different sub-basins of Gyeongsang basin and polar wander path of Cretaceous and Tertiary periods for the Southern part of Korean Peninsula, in close association with that for Southwest Japan.The study may enable us to determine the time of deposition and correlate among formations included in each basins. The results will provide the foundermental informations on the time of formations, paleomagnetic polar wander path in East Asia.