| 云南泸水钨锡矿床微量钾矿物~（40）Ar－~（39）Ar马鞍形年龄谱的含义 |
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| 引用本文： | 邱华宁,戴 谟,蒲志平.云南泸水钨锡矿床微量钾矿物~（40）Ar－~（39）Ar马鞍形年龄谱的含义[J].矿床地质,1995(3). |
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| 作者姓名： | 邱华宁 戴 谟 蒲志平 |
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| 作者单位： | 中国科学院广州地球化学研究所 |
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| 摘 要： | 采用４０＿Ａｒ－３９＿Ａｒ计时方法测定滇西沪水钨锡矿床的白云母、石英、电气石和绿柱石等矿物的年龄，其中微量Ｋ矿物（石英、电气石和绿柱石）均形成含过剩４０＿Ａｒ的马鞍形年龄谱。研究表明鞍形谱最小年龄的含义比较复杂，有些样品的最小年龄接近于成矿年龄，而有些样品的最小年龄大于甚至远大于成矿年龄。
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| 关 键 词： | 40＿Ar－39＿Ar法，马鞍形年龄谱，矿床年龄，云南 |
THE IMPLICATIONS OF 40_ Ar-39_Ar SADDLE-SHAPED AGE SPECTRA OF TRACE K MINERALS FROM THE LUSHUI TUNGSTEN-TIN DEPOSIT,YUNNAN PROVINCE |
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| Qiu Huaning,Dai Tongmo and Pu Zhiping.THE IMPLICATIONS OF 40_ Ar-39_Ar SADDLE-SHAPED AGE SPECTRA OF TRACE K MINERALS FROM THE LUSHUI TUNGSTEN-TIN DEPOSIT,YUNNAN PROVINCE[J].Mineral Deposits,1995(3). |
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| Authors: | Qiu Huaning Dai Tongmo and Pu Zhiping |
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| Abstract: | Ages of such minerals as muscovite quartz,tourmaline and beryl from the Lushui tungsten-tin deposit in western Yunnan were determined by40_ Ar-39_Ar method. The trace K minerals(quartz,tourmaline and beryl ) all form saddle-shaped age spectra of excess 40_Ar. Studies showthat implications of minimum ages of saddle-shaped spectra are rather complicated,with minimumages of some samples close to metallogenic ages whereas those of other samples older than or evenmuch older than metallogenic ages. |
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| Keywords: | Ar-39_Ar method saddle-shaped age spectrum age of ore deposit Yunnan |
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