Magnetostratigraphic Study for Lower Gyeongsang Super Group

京都大学与延世大学的“高陵—义宁地区下庆尚超级群的磁地层研究”合作研究项目于1996年作为日本海外科学研究项目（07044306）进行，由日本文部科学省和韩国KOSEF资助。庆尚盆地是形成于白垩纪-新近纪的东亚非海相沉积盆地的一部分。该盆地位于日本庆尚盆地和日本飞驒-上冈-山口地区之间，已引起日本和韩国地质学家的注意。虽然进行了多次调查，但也出现了辩论赛等多次取证。本磁地层研究是在庆尚超群进行的。1996年2月29日至3月19日，与日本和韩国科学家合作，在韩国南部地区进行了实地考察和收集古地磁样品的工作，包括晋州地区（白垩纪）52个地点（约260个岩石样品）高岭地区（白垩纪）56个地点（约280个岩石样品）浦项地区（第三纪）40个地点（约400个岩石样品），将在京都大学和延世大学进行实验室和总结工作。详细细致的岩石地磁和古地磁研究可以给出采样点的年龄和极点位置。明确了朝鲜半岛南部的沉积时代、庆尚盆地各子盆地间的地层对比以及白垩纪和第三纪的极地漂移路径与日本西南部的密切联系。该研究可使我们确定沉积时间，并确定各盆地所含地层之间的相互关系。研究结果将为东亚地区古地磁形成时间、地磁极移路径等提供基础资料。

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.