JaLCDOI 10.18926/40197
Title Alternative Minor elements of the Nanbu Kotai of Nakatsugo Deposits, Ningyo Toge Uranium Mine
FullText URL pitsr_036_023_030.pdf
Author Watanabe, Koji|
Abstract The Nakatsugo Deposits are the main deposits of the Ningyo Toge Mine which is located in the northern part of Okayama Prefecture. Nakatsugo Deposits consists of the two main ore body, namely, Nanbu Kotai (southern ore body) and Hon Kotai (main ore body). Nanbu Kotai is occupied mostly by the unoxidized zone and high grade ores containing ningyoite (n% U) are widely found in the basal conglomerates. Minor elements in the common rocks such as basal granites, conglomerates, sandstones, dikes, and shales as well as the uraniferous ores were determined quantatively by fluorescent X-ray spectrometric analysis (for U, Zr, Y, Sr, As, and Fe) and spectrophotometric analysis (for Ni and Co). As the results of this study, it is found that the uraniferous ores are characterised by extremely high contents of Zr, Y, Sr, and As, which show positive and linear correlation with the U contents. It is confirmed that As is concentrated in pyrite which is usually associated with the uraniferous ores. Elements such as Ni and Co are slightly concentrated both in the uraniferous ores and andesite dikes. This fact may suggest some genetic relationship among them. However, it does not seem to be plausible to draw any definite conclusion on the origin of the uranium deposits from these relationships. As to the minor element distribution in common rocks, no systematic variation was found except for the rock samples closely associated with the ore deposits.
Publication Title 岡山大学温泉研究所報告
Published Date 1966-10-25
Volume volume36
Start Page 23
End Page 30
ISSN 0369-7142
language 日本語
File Version publisher
NAID 120002400933
JaLCDOI 10.18926/21324
Title Alternative Determination of Dissolved Gases in the Ground Water at Mt. Daisen
FullText URL pitsr_034_053_062.pdf
Author Watanabe, Koji| Okuno, Takaharu|
Abstract 鳥取県大山火山の西北麓の地下水中に潜存するガス成分比は Ar : 0.34~0.40 (cc/l) 1.48~1.64 (%) O(2) : 6.69~9.08 (cc/l) 27.92~35.30 (%) N(2) : 15.16~17.23 (cc/l) 63.22~67.92 (%) の範囲内で定量できる.また,飽和度は次の如くである. O(2) : 87.8~113.9 (%) N(2) : 110.5~123.2 (%) この結果を地表水と比較して,O(2)の飽和度は小さいが,量的な差異はあまりみられず,地表水と地下水の中間的な性質を示している.地質構造,地形が溶存ガス成分比に及ぼす影響は,地下水の流通経路が長距離とみなされる場合に若干のO(2)の消費が認められ,短距離で湧出したと思われるものにはO(2)の飽和度が大きい傾向がある.また,水理地質的にみて,地質と湧出量には密接な関連を見出せるが,ガス成分には影響を与へてはいない.
Abstract Alternative The contents of the dissolved gases in the ground waters at the north west of the piedmont district of Daisen volcano, Tottori prefecture, are determined as follows. Ar: 0.34~0.40 (cc/l) 1.48~1.64 (%) O(2) : 6.69~9.08 (cc/l) 27.92~35.30 (%) N(2) : 15.16~17.23 (cc/l) 63.22~67.92 (%) The calculated degree of saturation of these ground waters with O(2) and N ranges as shown below : O(2) : 87.8~113.9 (%) N(2) : 110.5~123.2 (%) In this district, the ground water is generally of a shallow type. The degree of oxygen consumption of the water has a tendency to decrease as its pass under the ground is shorter. From the results obtained here, it is concluded that these ground water have intermediate properties of the surface and general ground water.
Publication Title 岡山大学温泉研究所報告
Published Date 1964-10-25
Volume volume34
Start Page 53
End Page 62
ISSN 0369-7142
language 日本語
File Version publisher
NAID 120002310987
JaLCDOI 10.18926/21323
Title Alternative Mineral Composition of Boring Core at Tottori Hot Spring
FullText URL pitsr_034_041_052.pdf
Author Watanabe, Koji|
Abstract 鳥取温泉の深度300mに及ぶ試錐のボーリング・コアを検討した結果,主成分鉱物として,石英,長石類(斜長石,加里長石,)と二次的生成鉱物としてモンモリロナイト,カオリナイト,イライト,緑泥石,黄鉄鉱などを認めた.このうち,イライトは堆積岩中に普遍的に存在し,更に緑泥石も全般的にしかも第三紀層で多量に認められている.モンモリロナイトは方解石と共に温泉による生成が考へられ,また,カオリナイトは表土層にのみ認める事ができる.一方,加里長石,黄鉄鉱,緑泥石の産出状態,及びコアが示す粒度,酸化状態からして第四紀層の堆積環境が推定され,25mを境として下部は数回の陸化を含む浅い堆積層であるのに対し,上部は比較的深い.背後供給地から離れた海成層を示唆する.
Abstract Alternative The boring coreS of Tottori Hot Spring, Tottori city were investigated by means of X-ray powder method and differential thermal analysis. Near this district, the Quarternary sediments are perceived until at a depth of 54 meters, and they show some striking differences from the Tertiary sediments which lies under-neath the former. In the Quarternary sediments, small amounts of chlorite coexist with ilIte. Kaolinite is found only in the top soil, and montmorillonite is present just above the unconformity with the Tertiary sediments. The clays from the Tertiary sediments contain abundant amounts of chlorite that exibits regional propylitization. The amounts of the rock forming minerals, quartz and feldspars, in these sediments regularly decrease with increasing amounts of clay minerals. The pH of the thermal water at the pit bottom ranges from 7 to 8, and the maximum water temperature, 57.2℃, is observed. The secondary minerals, montmorillonite and calcite, are thought to be the alteration products by the thermal water.
Publication Title 岡山大学温泉研究所報告
Published Date 1964-10-25
Volume volume34
Start Page 41
End Page 52
ISSN 0369-7142
language 日本語
File Version publisher
NAID 120002310959
JaLCDOI 10.18926/21322
Title Alternative Bed Rock and Wall Rock Alteration of the Uranium Deposits at the Togo Mine, Tottori Prefecture (1) Katamo and Asabatake Deposits
FullText URL pitsr_034_021_040.pdf
Author Watanabe, Koji|
Abstract 東郷鉱山,方面・麻畑ウラン鉱床の基盤岩および母岩は粘土化が著しく,その特徴として次のことが挙げられる. (a)粘土鉱物の種類,存在量は,鉱床の酸化帯・非酸化帯にはゞ規制されている.(b)粘土化の程度は原岩の種類により異なり,同一種数の岩石では酸化帯における変質が特に顕著である.(c)粘土量とウラン含有量との間には明確な相関は見出せないが,モンモリロナイトの量についてのみ観察すると,おおよそ負の相関がみられる.また,粘土化の主体をなすモンモリロナイトは,結晶度が良好で熱水変質が示唆きれる.化学分析の結果,SiO(2)の量が少ないので珪ばん比が異常に小さいが,ウラン鉱床近辺においてモンモリロナイト化に伴なう珪化帯が認められず,珪酸の逸脱が考えられる.鉱量的にみて,両鉱床の主体をなすウラン鉱物が燐顧塩鉱物であり,珪酸塩鉱物が少ないことなどから,モンモリロナイト化作用と鉱化作用との間には,直接関連がないものと考察される.
Abstract Alternative The Katamo and Asabatake Uranium Deposits, Togo Mine, about 5 Km south east of the lake Togo, central Tottori prefecture, is investigated to understand the nature of the bed rock and wall rock alterations. These alterations are remarkable and characterized as follows. (1) Both the clay mineral species and their relative amounts are closely related to the "oxidation-reduction enviroment" of the deposits. (2) The degree of alteration depends on the nature of the mother rocks and differs from an area to another. The most remarkable alteration is realized in the secondary oxidation zone. (3) Although the secondary uranium minerals are confined in the oxidation zone, there is no apparent relationship between the total amounts of clay minerals and uranium contents of the deposits. But the amounts of montmorillonite seems to decrease as uranium content goes up within some limited areas. The principal clay mineral in the deposits is montmorillonite. Kaolinite is also present in a small amount. Sericite is found only in some of the veins as an accessory mineral. Hydrothermal solutions seems to have played an important role for the formation of montmorillonite, as it is found in a well crystallized form in altered acidic pyroclastic sediments. Kaolinite, on the other hand, has a tendency to increase in its amount in arkose sediments which are sandwiched in volcanic sediments. This seems to show that kaolinite is a weathered product of the bed rocks of this region. The results presented in this paper could be a help in considering the origin of the Uranium deposits in this area.
Publication Title 岡山大学温泉研究所報告
Published Date 1964-10-25
Volume volume34
Start Page 21
End Page 40
ISSN 0369-7142
language 日本語
File Version publisher
NAID 120002310993
JaLCDOI 10.18926/21320
Title Alternative Radioactive Anomaly in the Okutsu Kaoline Mine, Okayama Prefecture
FullText URL pitsr_034_001_010.pdf
Author Okuno, Takahara| Watanabe, Koji|
Abstract 奥津カオリン鉱床は花崗緑岩中の熱水交代性の塊状粘土鉱床であって, 中心部に白色粘土鉱体, それをとりまいて石英沸石帯,更にその外側に緑簾石帯からなる変質の帯状分布が存在する. 放射能異常は外側変質帯の緑簾石帯に集中しており, そこにトリウムの濃集が認められる. 本鉱床の放射性元素の濃集は変質帯形成の機構と密接に関連するものとみられる.
Abstract Alternative The Okutsu Kaolin Mine. producing about 450 tons of clay a month, is located 25 Km north of Tsuyama, northern Okayama Prefecture. The massive hydrothermal clay deposits, present in granodiorite, is vertical1y and horizontally zoned. A white clay core, hal10ysite and hydrated halloysite, is surrounded by a laumontite-quartz zone. A epidote-quartz zone comes next and the outermost is a slightly altered granodiorite associated with epidote. The epidote-quartz zone is usually of radioactivity which is due to minor amounts of a reddish brown amorphous mineral, containg thorium. However, Uranium has never been detected in materials from the radioactive zone. The other zones are normal or low radioactivity. During hydrothermal alteration, the granodiorite changed to clay deposits and all the original components except Al(2)O(3) and TiO(2) were leached out. The leached CaO and Fe(2)O(3) were repricipitated around the deposits forming the epidote-quartz zone. The leached thorium behaved similarly with the two elements and waS concentrated together with them. The concept of the concentration of thorium discussed in this paper may help in solving questions on the alteration of the basal granite and the origin of radioactive elements in the neighbouring Ningyo Toge Uranium Fields.
Publication Title 岡山大学温泉研究所報告
Published Date 1964-10-25
Volume volume34
Start Page 1
End Page 10
ISSN 0369-7142
language 日本語
File Version publisher
NAID 120002311015