埼玉県長瀞地域に分布する泥質•砂質片岩中の酸化鉱物および硫化鉱物
長瀞地域における三波川変成帯中の泥質および砂質片岩中にみいだされる酸化鉱物•硫化鉱物の組み合せは岩石中に炭質物を含むか否かによりいちじるしく異る。すなわち,炭質物を含む岩石には含マンガンチタン鉄鉱•磁硫鉄鉱•黄鉄鉱が, 炭質物を含まない岩石中には赤鉄鉱が特徴的に現出し, 黄銅鉱•酸化チタン鉱物は両者に共通してみいだされる。これらの岩石の変成温度を350°Cと仮定して,酸化鉱物•硫化鉱物の平衡関係から変成時の酸素および硫黄のフュガシティーを計算により求めると, 炭質物を含む岩石では、ƒO2=10-31atm, ƒS2=10-9atm,炭質物を含まない岩石ではƒO2=10-16～10-28atm,...
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| Published in | 岩石鉱物鉱床学会誌 Vol. 70; no. 12; pp. 413 - 423 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | English Japanese |
| Published |
一般社団法人 日本鉱物科学会
05.12.1975
|
| Online Access | Get full text |
| ISSN | 0021-4825 1883-0765 |
| DOI | 10.2465/ganko1941.70.413 |
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| Abstract | 長瀞地域における三波川変成帯中の泥質および砂質片岩中にみいだされる酸化鉱物•硫化鉱物の組み合せは岩石中に炭質物を含むか否かによりいちじるしく異る。すなわち,炭質物を含む岩石には含マンガンチタン鉄鉱•磁硫鉄鉱•黄鉄鉱が, 炭質物を含まない岩石中には赤鉄鉱が特徴的に現出し, 黄銅鉱•酸化チタン鉱物は両者に共通してみいだされる。これらの岩石の変成温度を350°Cと仮定して,酸化鉱物•硫化鉱物の平衡関係から変成時の酸素および硫黄のフュガシティーを計算により求めると, 炭質物を含む岩石では、ƒO2=10-31atm, ƒS2=10-9atm,炭質物を含まない岩石ではƒO2=10-16～10-28atm, ƒS2>10-19atmとなる。前者の酸素フュガシティーが後者のそれと比較していちじるしく低いのは炭質物酸素に対する緩働作用にもとづくものと考えられる。また変成時の圧力をPsolid=Pgas=5×103atmと仮定して,炭質物を含む岩石の変成時における種々のガス相の分圧を計算すると、PCO2=2×102, PCO=3×10-2, PH2=3×100, PH2O=45×102, PCH4=3×102, PH2S=2×101, PSO2=2×10-8, PO2=1×10-31, PS2=1×10-9atmとなり, H2O, CH4, CO2などが主要成分であることがわかる。 |
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| AbstractList | 長瀞地域における三波川変成帯中の泥質および砂質片岩中にみいだされる酸化鉱物•硫化鉱物の組み合せは岩石中に炭質物を含むか否かによりいちじるしく異る。すなわち,炭質物を含む岩石には含マンガンチタン鉄鉱•磁硫鉄鉱•黄鉄鉱が, 炭質物を含まない岩石中には赤鉄鉱が特徴的に現出し, 黄銅鉱•酸化チタン鉱物は両者に共通してみいだされる。これらの岩石の変成温度を350°Cと仮定して,酸化鉱物•硫化鉱物の平衡関係から変成時の酸素および硫黄のフュガシティーを計算により求めると, 炭質物を含む岩石では、ƒO2=10-31atm, ƒS2=10-9atm,炭質物を含まない岩石ではƒO2=10-16～10-28atm, ƒS2>10-19atmとなる。前者の酸素フュガシティーが後者のそれと比較していちじるしく低いのは炭質物酸素に対する緩働作用にもとづくものと考えられる。また変成時の圧力をPsolid=Pgas=5×103atmと仮定して,炭質物を含む岩石の変成時における種々のガス相の分圧を計算すると、PCO2=2×102, PCO=3×10-2, PH2=3×100, PH2O=45×102, PCH4=3×102, PH2S=2×101, PSO2=2×10-8, PO2=1×10-31, PS2=1×10-9atmとなり, H2O, CH4, CO2などが主要成分であることがわかる。 |
| Author | 鞠子, 正 板谷, 徹丸 田中, 耕平 |
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| References | Miyashiro, A. (1964b), Notes on rock-forming minerals (32) geochemistry of oxygen and origin of native iron and native nickel-iron. Jour. Geol. Soc. Japan, 70, 493-499. Tanaka, K. (1973), Crystalline schists of the Sanbagawa metamorphic terrain in the Kanto Mountains with special reference to the metamorphic zoning and minerals (in Japan.). Ph. D. Thesis of Waseda Univ., 1-65 (unpublished). French, B. M. (1966), Some geological implications of equilibrium between graphite and a C-H-O gas phase at high temperatures and pressures. Rev. Geophys., 4, 223-253. Zen, E. (1963), Components, phases, and criteria of chemical equilibrium in rocks. Amer. Jour. Sci., 261, 929-942. Garrels, R. M. and Christ, C. L. (1965), Solutions, minerals, and equilibria. Harper and Row., New York. Thompson, J. B., Jr. (1972), Oxides and sulfides in regional metamorphism of pelitic schists. 24th IGC, Sec. 10, 27-35. Kubaschewski, O. and Evans, E. L. (1958), Metallurgical thermochemistry (third edition). Pergamon Press, London. Carmichael, I. S. E. (1967), The iron-titanium oxides of salic volcanic rocks and their associated ferromagnesian silicates. Contr. Miner. Petrol., 14, 36-64. Chinner, G. A. (1960), Pelitic gneisses with varying ferrous/ferric from Glen Clova, Angus, Scotland. Jour. Petrol., 1, 178-217. Kanehira, K., Banno, S. and Nishida, K. (1964), Sulfide and oxide minerals in some metamorphic terranes in Japan. Japan. Jour. Geol. Geogr., 35, 175-191. Zen, E. (1960), Metamorphism of Lower Palaeozoic rocks in the vicinity of the Taconic Range in west-central Vermount. Amer. Mineral., 45, 129-175. Miyashiro, A. (1973), Metamorphism and metamorphic belt. George Allen and Unwin Ltd, London. Miyashiro, A. (1964a), Oxidation and reduction in the earth's crust with special reference to the graphite. Geochim. Coschim. Acta, 28, 717-729. Lindsley, D. H. (1965), Iron-titanium oxices. C. I. W. Y., 64, 144-148. Robie, R. A. (1966), Thermodynamic properties of minerals. “Handbook of physical constants”, Geol. Soc. Amer. Memo., 97, 437-458. Seki, Y. (1958), Glaucophanitic regional metamorphism in the Kanto Mountains, central Japan. Japan. Jour. Geol. Geogr., 29, 233-258. Tsusue, A. and Ishihara, S. (1974), The irontitanium oxides in the granitic rocks of Southwest Japan (in Japan. with English abstr.). Mining Geol., 24 13-30. Seki, Y. (1973), Temperature and pressure scale of low-grade metamorphism (in Japan. with English abstr.). Jour. Geol. Soc. Japan, 79, 735-743. Taylor, R. W. (1964), Phase equilibria in the system FeO-Fe2O3-TiO2 at 1300°C. Amer. Mineral., 49, 1016-1030. Barton, P. B., Jr. (1973), Solid solution in the system Cu-Fe-S. Part I: The Cu-S and CuFe-S joins. Econ. Geol., 68, 455-465. Burnham, C. W., Hollowey, J. R. and Davis, N. F. (1969), Thermodynamic properties of water to 1,000°C and 10,000 bars. Geol. Soc. Amer. Spec. Paper, 132, 1-96. Ono, K. and Moriyama, J. (1973), Thermodynamic study on the Fe-FeO-TiO2 system. (in Japan. with English abstr.). Jour. Min. Metal. Inst. Japan, 89, 313-316. Wagman, D. D., Kilpatric, J. E., Taylor, W. J., Petzer, K. S., and Rossini, F. D. (1945), Heats, free energies, and equlibrium constants of some reactions involving O2, H2, H2O, C, CO, CO2, and CH4. Jour. Research NBS, 34, 143-161. Mariko, T., Itaya, T., Shiga, Y., and Tanaka, K. (1974), Opaque minerals in crystalline schists of the Sanbagawa metamorphic terrain in the Kanto Mountains (abstr. in Japan.). Joint meeting of Japan. Assoc. Miner. Petrol. Econ. Geol., Miner. Soc. Japan and Soc. Mining Geol. Japan, C20. Holland, H. D. (1959), Some applications of thermochemical data to problems of ore deposits. I. Stability relations among the oxides, sulfides, sulfates and carbonates of ore and gangue metals. Econ. Geol., 54, 184-233. Shaw, D. M. (1956), Geochemistry of pelitic rocks part III: Major elements and general chemistry. Geol. Soc. Amer. Bull., 67, 919-934. Buddington, A. F. and Lindsley, D. H. (1964), Irontitanium oxide minerals and synthetic equivalents. Jour. Petrol., 5, 310-357. Rumble, D. (1971), Fe-Ti oxide minerals and behavior of oxigen during regional metamorphism. C. I. W. Y., 70, 157-165. Eugster, H. P. (1958), Reduction and oxidation in metamorphism. “Research in Geochemistry”, John Wiley and Sons, New York. Lindsley, D. H. (1962), Investigations in the system FeO-Fe2O3-TiO2. C. I. W. Y., 61, 100-107. Tanaka, K., Imai, N. and Nakamura, T. (1972), A high manganoan piemontite from the Nagatoro district, Saitama Prefecture, Japan. Jour. Japan. Assoc. Min. Pet. Econ. Geol., 67, 117-127. Banno, S. and Kanehira, K. (1961), Sulfide and oxide minerals in schists of the Sanbagawa and central Abukuma metamorphic terranes. Japan. Jour. Geol. Geogr., 32, 331-348 Tanaka, K. and Fukuda, M. (1974), Geologic structure and metamorphic zoning of the northern extremity of the Sanbagawa metamorphic terrain in the Kanto Mountains-with special reference to the occurrence of biotite-(in Japan. with English abstr.) Jour. Japan. Assoc. Min. Pet. Econ. Geol., 69, 313-323. Izawa, E. (1968), Carbonaceous matter in some metamorphic rocks in Japan. Jour. Geol. Soc. Japan, 74, 427-432. Coombs, D. S. (1971), Present status of the zeolite facies. “Molecular-Sieve Zeolites-1”. Adv. in Chemistry, ser. 100, Amer. Chem. Soc., 317-326. Holland, H. D. (1965), Some applications of thermochemical data to problems of ore deposits. II. Mineral assemblages and the composition of ore-forming fluids. Econ. Geol., 60, 1101-1166. Lindsley, D. H. (1963), Equilibrium relations of coexisting pairs of Fe-Ti oxides. C. I. W. Y., 62, 60-66. French, B. M. and Eugster, H. P. (1965), Experimental control of oxygen fugacities by graphite-gas equilibriums. Jour. Geophys. Res., 70, 1529-1539. MacChesney, J. B. and Muan, A. (1961), phase equilibria at liquidus temperatures in the system iron-titanium oxide at low temperatures. Amer. Mineral., 46, 572-582. |
| References_xml | – reference: Tanaka, K. (1973), Crystalline schists of the Sanbagawa metamorphic terrain in the Kanto Mountains with special reference to the metamorphic zoning and minerals (in Japan.). Ph. D. Thesis of Waseda Univ., 1-65 (unpublished). – reference: Shaw, D. M. (1956), Geochemistry of pelitic rocks part III: Major elements and general chemistry. Geol. Soc. Amer. Bull., 67, 919-934. – reference: French, B. M. (1966), Some geological implications of equilibrium between graphite and a C-H-O gas phase at high temperatures and pressures. Rev. Geophys., 4, 223-253. – reference: Tsusue, A. and Ishihara, S. (1974), The irontitanium oxides in the granitic rocks of Southwest Japan (in Japan. with English abstr.). Mining Geol., 24 13-30. – reference: Rumble, D. (1971), Fe-Ti oxide minerals and behavior of oxigen during regional metamorphism. C. I. W. Y., 70, 157-165. – reference: Holland, H. D. (1959), Some applications of thermochemical data to problems of ore deposits. I. Stability relations among the oxides, sulfides, sulfates and carbonates of ore and gangue metals. Econ. Geol., 54, 184-233. – reference: Lindsley, D. H. (1965), Iron-titanium oxices. C. I. W. Y., 64, 144-148. – reference: Eugster, H. P. (1958), Reduction and oxidation in metamorphism. “Research in Geochemistry”, John Wiley and Sons, New York. – reference: Miyashiro, A. (1964b), Notes on rock-forming minerals (32) geochemistry of oxygen and origin of native iron and native nickel-iron. Jour. Geol. Soc. Japan, 70, 493-499. – reference: Kubaschewski, O. and Evans, E. L. (1958), Metallurgical thermochemistry (third edition). Pergamon Press, London. – reference: Ono, K. and Moriyama, J. (1973), Thermodynamic study on the Fe-FeO-TiO2 system. (in Japan. with English abstr.). Jour. Min. Metal. Inst. Japan, 89, 313-316. – reference: Robie, R. A. (1966), Thermodynamic properties of minerals. “Handbook of physical constants”, Geol. Soc. Amer. Memo., 97, 437-458. – reference: Carmichael, I. S. E. (1967), The iron-titanium oxides of salic volcanic rocks and their associated ferromagnesian silicates. Contr. Miner. Petrol., 14, 36-64. – reference: French, B. M. and Eugster, H. P. (1965), Experimental control of oxygen fugacities by graphite-gas equilibriums. Jour. Geophys. Res., 70, 1529-1539. – reference: Lindsley, D. H. (1963), Equilibrium relations of coexisting pairs of Fe-Ti oxides. C. I. W. Y., 62, 60-66. – reference: Barton, P. B., Jr. (1973), Solid solution in the system Cu-Fe-S. Part I: The Cu-S and CuFe-S joins. Econ. Geol., 68, 455-465. – reference: Seki, Y. (1973), Temperature and pressure scale of low-grade metamorphism (in Japan. with English abstr.). Jour. Geol. Soc. Japan, 79, 735-743. – reference: Garrels, R. M. and Christ, C. L. (1965), Solutions, minerals, and equilibria. Harper and Row., New York. – reference: Thompson, J. B., Jr. (1972), Oxides and sulfides in regional metamorphism of pelitic schists. 24th IGC, Sec. 10, 27-35. – reference: MacChesney, J. B. and Muan, A. (1961), phase equilibria at liquidus temperatures in the system iron-titanium oxide at low temperatures. Amer. Mineral., 46, 572-582. – reference: Zen, E. (1963), Components, phases, and criteria of chemical equilibrium in rocks. Amer. Jour. Sci., 261, 929-942. – reference: Kanehira, K., Banno, S. and Nishida, K. (1964), Sulfide and oxide minerals in some metamorphic terranes in Japan. Japan. Jour. Geol. Geogr., 35, 175-191. – reference: Seki, Y. (1958), Glaucophanitic regional metamorphism in the Kanto Mountains, central Japan. Japan. Jour. Geol. Geogr., 29, 233-258. – reference: Miyashiro, A. (1973), Metamorphism and metamorphic belt. George Allen and Unwin Ltd, London. – reference: Tanaka, K., Imai, N. and Nakamura, T. (1972), A high manganoan piemontite from the Nagatoro district, Saitama Prefecture, Japan. Jour. Japan. Assoc. Min. Pet. Econ. Geol., 67, 117-127. – reference: Holland, H. D. (1965), Some applications of thermochemical data to problems of ore deposits. II. Mineral assemblages and the composition of ore-forming fluids. Econ. Geol., 60, 1101-1166. – reference: Chinner, G. A. (1960), Pelitic gneisses with varying ferrous/ferric from Glen Clova, Angus, Scotland. Jour. Petrol., 1, 178-217. – reference: Lindsley, D. H. (1962), Investigations in the system FeO-Fe2O3-TiO2. C. I. W. Y., 61, 100-107. – reference: Miyashiro, A. (1964a), Oxidation and reduction in the earth's crust with special reference to the graphite. Geochim. Coschim. Acta, 28, 717-729. – reference: Buddington, A. F. and Lindsley, D. H. (1964), Irontitanium oxide minerals and synthetic equivalents. Jour. Petrol., 5, 310-357. – reference: Burnham, C. W., Hollowey, J. R. and Davis, N. F. (1969), Thermodynamic properties of water to 1,000°C and 10,000 bars. Geol. Soc. Amer. Spec. Paper, 132, 1-96. – reference: Mariko, T., Itaya, T., Shiga, Y., and Tanaka, K. (1974), Opaque minerals in crystalline schists of the Sanbagawa metamorphic terrain in the Kanto Mountains (abstr. in Japan.). Joint meeting of Japan. Assoc. Miner. Petrol. Econ. Geol., Miner. Soc. Japan and Soc. Mining Geol. Japan, C20. – reference: Wagman, D. D., Kilpatric, J. E., Taylor, W. J., Petzer, K. S., and Rossini, F. D. (1945), Heats, free energies, and equlibrium constants of some reactions involving O2, H2, H2O, C, CO, CO2, and CH4. Jour. Research NBS, 34, 143-161. – reference: Izawa, E. (1968), Carbonaceous matter in some metamorphic rocks in Japan. Jour. Geol. Soc. Japan, 74, 427-432. – reference: Taylor, R. W. (1964), Phase equilibria in the system FeO-Fe2O3-TiO2 at 1300°C. Amer. Mineral., 49, 1016-1030. – reference: Tanaka, K. and Fukuda, M. (1974), Geologic structure and metamorphic zoning of the northern extremity of the Sanbagawa metamorphic terrain in the Kanto Mountains-with special reference to the occurrence of biotite-(in Japan. with English abstr.) Jour. Japan. Assoc. Min. Pet. Econ. Geol., 69, 313-323. – reference: Zen, E. (1960), Metamorphism of Lower Palaeozoic rocks in the vicinity of the Taconic Range in west-central Vermount. Amer. Mineral., 45, 129-175. – reference: Coombs, D. S. (1971), Present status of the zeolite facies. “Molecular-Sieve Zeolites-1”. Adv. in Chemistry, ser. 100, Amer. Chem. Soc., 317-326. – reference: Banno, S. and Kanehira, K. (1961), Sulfide and oxide minerals in schists of the Sanbagawa and central Abukuma metamorphic terranes. Japan. Jour. Geol. Geogr., 32, 331-348 |
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| Snippet | 長瀞地域における三波川変成帯中の泥質および砂質片岩中にみいだされる酸化鉱物•硫化鉱物の組み合せは岩石中に炭質物を含むか否かによりいちじるしく異る。すなわち,炭質物を含む岩石には含マンガンチタン鉄鉱•磁硫鉄鉱•黄鉄鉱が, 炭質物を含まない岩石中には赤鉄鉱が特徴的に現出し,... |
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| Title | 埼玉県長瀞地域に分布する泥質•砂質片岩中の酸化鉱物および硫化鉱物 |
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