『Abstract
　Metallic and non-metallic mineralizations in the Chugoku district are reviewed along with discussions several genetical problems involved. Also presented are microprobe analyses of ore minerals.
　In the Early Carboniferous to Middle Permian Period, limestones were originally deposited under reef conditions and accreted in Late Permian to Early Triassic Period, resulting in the formation of the limestone deposits (e.g., Akiyoshi, Zomeki-Handa, Taishaku, Atetsu, Nariwa). In the Late Permian Period, the following ore deposits were formed related to basic magmatism: (1) chromite deposits (e.g., Hirose, Wakamatsu) closely associated with ultramafic complex in non- to weakly metamorphosed Paleozoic or the Sangun metamorphics, with or without small-scaled magnesite, dolomite, talc and asbestos deposits; (2) Kieslagers closely associated with the Sangun basic schists (e.g., Tsuboi) and with acid pyroclastics of the Maizuru Group (e.g., Yanahara); and (3) bedded Mn deposits (e.g., Kusugi, Aohara, Itoshiromi), some of which have been subjected to the Ryoke metamorphism (e.g., Fukumaki) or to thermal metamorphism by the Hiroshima-type ilmenite series granitoids (e.g., Renge). Since the manganese deposits are concentrated in the chert-rich Jurassic formations composed of accretion sediments, they may have one or more than two metallogenic epochs. In Triassic Period, anthracite deposits were formed under deltaic environments (e.g., Ohmine, Nariwa). In the Late Cretaceous Period, the following ore deposits, most abundant and polymetallic, were formed in relation to the ilmenite series granitoids: (1) pegmatites (e.g., Umanotani Shiroyama); (2) skarns (e.g., Kawayama (pyrrhotite), Kuga (Cu-Zn-Sn-W), Jinmu (CaF2-Cu), Sanpo (Cu-Fe), Mihara (Cu)); (3) veins (e.g., So (Cu-W), Yakuoji, Kanagatao, Setoda (Cu-W), Obie (Cu), Higasa (Au-Cu), Sankichi (W); (4) pyrophyllite (“Roseki”) deposits (e.g., Uku, Shokozan, Mitsuishi); (5) possibly fluorite veins (e.g., Takane, Sugiyama) and Sb veins (e.g., Kano, Toyoka). In the Early Tertiary (Paleogene), the following ore deposits were formed related to the magnetite series granitoids: (1) “orthomagmatic” magnetite deposits (e.g., Ebisu); (2) skarns (e.g., Ushirodai (Cu-Zn), Ino-Kurosawa (Fe)); (3) veins (e.g., Dogamaru (Cu), Obayashi (Pb-Zn), Daito, Seikyu, higashiyama, Yamasa (Mo), Ogamo (Au-Ag-U)); (4) pipe-like and veins with “greisen” )e.g., Komaki, Sekigane (Mo-W)); (5) sericite deposits (e.g., Unnan, Nabeyama); and (6) kaolin deposits (e.g., Yano-Maki). As well as the Kabutoyama Au-Ag deposits, sub-bituminous coal deposits (e.g., Ube) were formed in this period. In the Middle Miocene, the following ore deposits were formed in relation to the Green Tuff movement: (1) Kuroko deposits (e.g., Iwami, Udo, Wanibuchi); (2) veins (e.g., Homanzan, Taiho (Cu-Pb-Zn), Eiki, Momodani, Iwami (Cu)); (3) non-metallic deposits of hydrothermal origin-gypsum (e.g., Iwami, Matsushiro, Wanibuchi), bentonite (e.g., Mitani, Asayama, Hase) and zeolite (e.g., Iwami, Niman). Other deposits formed in this period are diatomaceous earth deposits (e.g., Oki-Dogo); sedimentary U deposits (e.g., Ningyotoge); abundant small-scaled sub-bituminous to brown coal deposits; and iron sand deposits (e.g., Kiwado, Konan, Yakumo).
　In Quarternary Period, the following deposits were formed: (1) Pleistocene Au-Ag-Cu veins (e.g., Omori); Mn deposits of hydrothermal origin (e.g., Sanbe, Omori); (3) silica sand deposits of Pliocene to Pleistocene (e.g., Matsugayama, Yunotsu); (5) iron sand deposits (e.g., Torigamihiikawa); and (6) diatomaceous earth deposits (e.g., Hiruzenbara).』

序
�T．地質概要
　�T.1.　中（先白亜系）・古生界
　�T.2.　白亜紀後期−古第三紀火成岩類
　　1.　領家帯
　　2.　山陽帯
　　3.　山陰帯
　�T.3.　新生界
　　1.　古第三系
　　2.　新第三系
　　3.　第四系
�U．鉱床総論
　�U.1.　金属鉱床のタイプおよび分布
　　1.　正マグマ型鉱床
　　2.　キースラーガー型鉱床
　　3.　スカルン型鉱床
　　4.　鉱脈型鉱床
　　5.　黒鉱型鉱床
　　6.　堆積型鉱床
　　7.　砂鉄鉱床
　�U.2.　非金属鉱床のタイプおよび分布
　　1.　ペグマタイト鉱床
　　2.　熱水鉱床
　　3.　堆積性鉱床
　�U.3.　鉱床生成時期
�V．鉱床各論
　�V.1.　金銀鉱石および鉱物
　�V.2.　銅・鉛・亜鉛鉱石および鉱物
　�V.3.　タングステン鉱石および鉱物
　�V.4.　モリブデン鉱石および鉱物
　�V.5.　鉄鉱石および鉱物
　�V.6.　硫化鉄鉱および鉱物
　�V.7.　ビスマス鉱石および鉱物
　�V.8.　錫鉱石および鉱物
　�V.9.　アンチモン鉱石および鉱物
　�V.10.　クロム鉱石および鉱物
�W．中国地方の鉱床に関する成因的諸問題
謝辞
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