@article{oai:ir.kagoshima-u.ac.jp:00008577,
 author = {鈴木, 達郎 and 中村, 和人 and 宮田, 哲生 and 新原, 洋也 and 北村, 教浩 and 田中, 智博 and 大石, 誠 and 大野, 尚行 and 七夕, 弘和 and 千代田, 卓 and 坂本, 達則},
 journal = {鹿児島大学教育学部研究紀要. 自然科学編, Bulletin of the Faculty of Education, Kagoshima University. Natural science},
 month = {2016-10-28},
 note = {The Cretaceous to Neogene Shimanto Super Group in Kyushu, southern Japan, is characterized as elemental compositions and its spatial distributions based on the content determination of various elements using instrumental neutron activation analysis (INAA) for 23 elements from about 200 sandstone rock specimens. The Shimanto Super Group, which have been regarded as an accretion tectonic unit, forming the major frame structure of the Outer Zone of Southwest Japan, has been divided into two groups; the Cretaceous Group in the Northern Shimanto Belt and the Paleogene to Neogene Groups in the Southern Belt. The Cretaceous group, named the Morotsuka Group, is composed of the Saiki Sub-Group and the Kamae Sub-Group, whose ages have been estimated as Early Cretaceous and Middle to Late Cretaceous, respectively, mainly from their radiolarian biostratigraphical evidence. The differences in geochemical characteristics obtained from the major components of elements between the Saiki Sub-Group and the Kamae Sub-Group corresponded to the difference of modal composition of rock-forming minerals or components of quartz, feldspar, and lithic fragments in sandstones of these sub-groups as previously reported by Teraoka and Okumura (1992) and others. Other while, the geochemical characteristics of spatial distribution of elements within each sub-group can be thought to indicate differences on back-land geology during supplying the depositional materials in the Cretaceous to Neogene Periods. The spatial distribution of various elements in the Cretaceous Morotsuka Group is described in this study providing the database on the geologic developments in the Cretaceous period of southern Japan.},
 pages = {7--16},
 title = {九州における四万十累層群砂質岩の放射化分析},
 volume = {64},
 year = {}
}