| Age and Thermal History of the East Ore Section,Bayan,Obo Deposit—A Fission Track Study |
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| 引用本文： | 张峰,刘铁庚,等.Age and Thermal History of the East Ore Section,Bayan,Obo Deposit—A Fission Track Study[J].中国地球化学学报,1997,16(1):80-85. |
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| 作者姓名： | 张峰 刘铁庚 |
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| 作者单位： | TheStateKeyLaboratoryofEnvironmentGeochemistry,InstituteofGeochemistry,ChineseAcademyofSciences,Guiya |
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| 摘 要： | Considerable attention has been paid in recent years to the study of geothermal history by using spontaneous fission tracks of 238U recorded in minerals.Apatite and zircon were used for fission track study in this paper because apatitie has been widely used as a natural geothermometer(Wang Shicheng et al., 1994) to reveal the thermal evolution of sedimentary rocks based on its low annealing temperature of fission tracks and zircon is characterized by a closing temperature above 700℃,The samples were collected from ferruginous,siliceous slate wall rock at the upper levels of the orebody and Nb-REE-Fe ores from deep tunnels.The age and thermal evolution of the orebody were discussed in terms of fission track characters and their length variations observed in the coexisting apatite and zircon in the same specimen.
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| 关 键 词： | 锆石 裂变轨迹 磷灰石 铁矿床 稀土元素矿床 成矿时代 稀土元素 |
Age and thermal history of the east ore section, Bayan Obo Deposit—a fission track study |
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| Zhang Feng,Liu Tiegeng,Zhang Fengxiang.Age and thermal history of the east ore section, Bayan Obo Deposit—a fission track study[J].Chinese Journal of Geochemistry,1997,16(1):80-85. |
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| Authors: | Zhang Feng Liu Tiegeng Zhang Fengxiang |
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| Institution: | (1) The State Key Laboratory of Environment Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550002 Guiyang, China;(2) Open Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550002 Guiyang, China |
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| Abstract: | Considerable attention has been paid in recent years to the study of geothermal history by using spontaneous fission tracks
of238U recorded in minerals. Apatite and zircon were used for fission track study in this paper because apatite has been widely
used as a natural geothermometer (Wang Shicheng et al., 1994) to reveal the thermal evolution of sedimentary rocks based on
its low annealing temperature of fission tracks and zircon is characterized by a closing temperature above 700°C. The samples
were collected from ferruginous, siliceous slate wall rock at the upper levels of the orebody and Nb-REE-Fe ores from deep
tunnels. The age and thermal evolution of the orebody were discussed in terms of fission track characters and their length
variations observed in the coexisting apatite and zircon in the same specimen.
This project was granted by the National Natural Science Foundation of China. |
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| Keywords: | fission track zircon apatite |
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