@article{oai:mie-u.repo.nii.ac.jp:00003042,
 author = {田中, 伸一 and Tanaka, Shinichi and 小倉, 義雄 and Ogura, Yoshio},
 journal = {三重大学教育学部研究紀要. 自然科学},
 month = {Feb},
 note = {application/pdf, Several commercial fireclay producing areas are known in Tōkai region. Among them Iga-Ueno, Shimagahara area in noted as a locality of fireclay such as "Gairome" and "Kibushi" clay in Mie Prefrcture. Iga-Ueno are, west of Ueno city, is mainly composed of sand, silt, clay, volcanic ash and gravel with lignite seams. These constitutents are called Iga clay formation (a member of the Kobiwako group: Pliocene to Pkeistocene), which is considered as fresh-water sediments in small basin on the basement of granite. Fireclay mined in both Maruyama ansd Kawamoto mines are situated in the southern part of the Iga-Ueno area. Successional profile to ore deposit and mineralogical compositio have been examined in both mines. In Maruyama, clay formation can be divided into the following three zones from the bed rock of weathered granite to the surface (depth about 20m): lower sandy clay, "Kibushi" clay and upper sandy clay. The most upper zone is covered by gravel zone as a role of cap-rock. Also, In Kawamoto, clay formation (about 15m depth) shows mostly similar tendency of zoning such as: lower sandy clay, "Gairome" and/or "Kibushi" clay and upper sandy clay. The main clay formation of the "Gairome" and "Kibushi" clays are mainly composed of kaolinite and fine grained quartz and feldspar accompained by small amounts of sericite. These clays are considered as residual substances originating from weathered granitic rocks. Several thin white layers (about 20 to 30cm in width) are intercalated in the upper horizon of sandy clay zones. These are probably originate from the volcanic ash due to their occurrence and mineralogical characters. Further, this white clay minerals: composed of montmorillonite, halloysite, both montmorillonite and halloysite and amorphus. This difference in minerlogy seems to be related to the original source and degree of the weathering process. Crystallinity of kaolinite (Hinckely index value) in clay formation, at Maruyama and Kawamoto deposits fall within the range of 0.21-0.84 and 0.29-0.57, respectively. This value shows similar tendency to that of some of the other deposits in same Iga region. Further, the mode of occurrence and mineralogical features of clay formation in this area are mostly similar to those of other various locality  of "Kibushi" clay deposits in Tōkai region.@@@三重県上野盆地周辺地域には愛知県瀬戸、岐阜県土岐・多治見地域とともに多くの耐火粘土鉱床が分布している。当地域の粘土鉱床は、基盤岩である領家花崗岩類の風化砕屑物が基盤の凹地に堆積し粘土化したもので、古琵琶湖層群の最下部に相当する。ここでは、上野盆地西部に位置する丸山・川本鉱山の鉱床の産状および粘土鉱物の性状や、隣接する黒崎鉱山、峰陶土鉱床との対比について述べる。丸山・川本鉱床は砂質粘土を主とし、木節粘土、蛙目粘土、白色粘土などの各層からなり、その最上部を砂礫層が覆っている。両鉱床の砂質・蛙目・木節粘土層の主要鉱物はカオリナイト、石英、長石で、隣接する他地域の黒崎・峰鉱床の構成鉱物組成、化学成分などを比較すると、各鉱床間での大きな差異はみられない。各鉱床に存する白色粘土層は火山灰起源と考えられ、モンモリナイトを主とするもの、ハロイサイトを主とするもの、その両方を含むもの、非晶質物質を主とするものの4タイプに分類できる。},
 pages = {47--66},
 title = {三重県上野盆地周辺の粘土鉱床について},
 volume = {44},
 year = {1993}
}