中文摘要:文章通过对哈密镜儿泉伟晶岩型稀有金属矿床中白云母的40Ar-39Ar同位素定年研究， 测得该矿床的同位素年龄数据,其坪年龄为(243±2) Ma。这一结果显示，镜儿泉的含稀有金属伟晶岩脉是在印支期形成的，并且在形成之后没有再受到后期地质事件的影响。与阿尔泰成矿省相似，东天山在印支期也发生了伟晶岩型稀有金属的成矿作用。这表明，东天山地区的成矿演化与阿尔泰地区具有可比性，从而为2个地区的地质找矿指出了新的方向。
中文关键词:地球化学 印支期 伟晶岩型稀有金属矿床 白云母 40Ar-39Ar 法测年 镜儿泉 新疆
Abstract:40Ar-39Ar method was used to date muscovite from the Jingerquan pegmatite rare metal deposit in Hami, Xinjiang and, as a result, some new isotopic geochronological data were obtained. It is shown that this deposit was formed at (243±2) Ma of Indosinian period and since then it has maintained a solid and closed isotopic system. Similar to things of the Altay metallogenic province, mineralization of pegmatite rare metal deposits also occurred in East Tianshan Mountains during the Indosinian period. The results suggest that the mineralization regularity in the Altay region can be applied to East Tianshan region, and that geologists from Altay and from East Tianshan can learn from each other for further exploration.
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基金项目:中国地质调查局大调查项目“中国成矿体系与区域成矿评价”(K1.4_3_4)、国土资源百人计划项目、科技攻关项目（2003BA612A_01）
引用文本：
陈郑辉，王登红，龚羽飞，陈毓川，陈世平.2006.新疆哈密镜儿泉伟晶岩型稀有金属矿床40Ar-39Ar年龄及其地质意义[J].矿床地质,25(4):470~476陈郑辉，王登红，龚羽飞，陈毓川，陈世平.2006.40Ar-39Ar isotope dating of muscovite from Jingerquan pegmatite rare metal deposit in Hami, Xinjiang, and its geological significance[J].Mineral Deposits25(4):470~476
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