2 0 0 0 熱海図幅地質説明書
- 著者
- 工業技術院地質調査所編
- 出版者
- 工業技術院地質調査所
- 巻号頁・発行日
- 1952
1 0 0 0 地質ニュース
- 著者
- 工業技術院地質調査所 [編]
- 出版者
- 工業技術院地質調査所
- 巻号頁・発行日
- 1953
1 0 0 0 OA 大日本帝国地質図説明書 : 百万分一
- 著者
- 農商務省地質調査所 編
- 出版者
- 吾妻健三郎
- 巻号頁・発行日
- 1900
1 0 0 0 朝鮮鑛床調査報告
- 著者
- [朝鮮總督府地質調査所編]
- 出版者
- 朝鮮總督府地質調査所
- 巻号頁・発行日
- 1913
1 0 0 0 OA 朝鮮鉱物誌
- 著者
- 朝鮮総督府地質調査所 編
- 出版者
- 三省堂
- 巻号頁・発行日
- 1941
1 0 0 0 OA 人形峠地域ウラン鉱床の発見および探査・開発の成果
- 著者
- 地質調査所 原子燃料公社
- 出版者
- The Society of Resource Geology
- 雑誌
- 鉱山地質 (ISSN:00265209)
- 巻号頁・発行日
- vol.14, no.63, pp.1-10, 1964-02-29 (Released:2009-06-12)
- 参考文献数
- 12
The prospecting for nuclear raw material resources in our country was undertaken in 1954 by the Geological Survey of Japan. Based upon the geological consideration, the prospecting operations were carried out in the so-called "massif" region consisting mainly of granites. The first discovery of uranium mineralization in sedimentary rocks was made by a car-borne team towards the end of the year at Ningyô-tôgé in the Chugoku massif, Southwest Japan. It was confirmed by the geological research that the uranium minerals occur in conglomerates and sandstones of the Neogene Tertiary unconformably overlying the granites.The task of detailed survey for economic development was handed over to the Atomic Fuel Corporation which was established in 1956. The Corporation proceeded to trenching, geophysical and geochemical prospecting, drilling and tunnelling. As the result of these operations, three million tons of the ore reserves containing two thousands tons of uranium metal have been recognized.The uranium ores of Ningyô-tôgé are soft and porous, and the uranium minerals occurring as finegrained crystals in the matrix are easily soluble in acid. Such characteristice of the ore enable 1) to raise their grade several times as high by washing and screening, 2) to exploit by the hydraulic method and 3) to extract the uranium under the mild condition. Furthermore, it must be noted that there are almost no minerals containing elements which interfere with the refining process or possess high cross-section for neutron absorption.
1 0 0 0 地質調査所略史
- 著者
- 地質調査所80周年記念出版物編集委員会編
- 出版者
- 工業技術院地質調査所
- 巻号頁・発行日
- 1962