| 云南泸水钨锡矿床微量钾矿物40Ar-39Ar马鞍形年龄谱的含义 |
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| 引用本文：.1995.The implications of 40Ar-39Ar saddle-shaped age spectra of trace K minerals from the Lushui tungsten-tin deposit, Yunnan Province[J].Mineral Deposits,14(3):273~280 |
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| 基金项目:国家自然科学基金资助项目 |
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| 中文摘要:采用40Ar-39Ar计时方法测定滇西泸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40Ar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。 |
| 中文关键词:40Ar-39Ar 法 马鞍形年龄谱 矿床年龄 云南 |
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| The implications of 40Ar-39Ar saddle-shaped age spectra of trace K minerals from the Lushui tungsten-tin deposit, Yunnan Province |
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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 by 40Ar-39Ar method. The trace K minerals (quartz, tourmaline and beryl) all form saddle-shaped age spectra of excess 40Ar. Studies show that implications of minimum ages of saddle-shaped spectra are rather complicated, with minimum ages of some samples close to metallogenic ages whereas those of other samples older than or even much older than metallogenic ages. |
| keywords:40Ar-39Ar merhod, saddle-shaped age spectrum, age of ore deposit, Yunnan |
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