Determination of the Noble Gas Isotopic Composition in Rocks and Minerals by Mass Spectrometry
Determination of the Noble Gas Isotopic Composition in Rocks and Minerals by Mass Spectrometry
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发表时间：
2001
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通讯作者：
Ye Xian
中科院分区：
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作者：
Ye Xian
建立了用质谱法测定岩石和矿物中He、Ne、Ar、Kr和Xe同位素组成的方法。用该方法成功地测定了宽甸地区火成岩和地幔岩石中He、Ne、Ar、Kr和Xe元素的丰度和同位素比值。在液氮温度下，利用吸收剂消除了40ar2 +对20ne的干扰。质谱仪内压力小于8×10 -4 Pa，以保证较好的测定条件。分析结果表明，中国东部大陆幔幔稀有气体特征具有MORB储层特征。
A method for determination of He, Ne, Ar, Kr and Xe isotopic compositions in rocks and minerals by mass spectrometry has been developed. The elemental abundance and isotopic ratios of He, Ne, Ar, Kr and Xe in the igneous and mantle rocks from Kuandian, eastern China were successfully measured by the present method. The interference from 40 Ar 2+ on 20 Ne was eliminated using absorbent at the liquid nitrogen temperature. The pressure in the mass spectrometer is less than 8×10 -4 Pa in order to ensure a better determining condition. The analytical results show that the noble gases signature in the continental mantle of eastern China has a feature of MORB reservoir.