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Jiuhua Xu, Yuling Xie, Lijun Wang, Heping Zhu, and Liquan Wang, Rare earth elements in CO2-fluid inclusions in mantle Iherzolite, J. Univ. Sci. Technol. Beijing , 10(2003), No. 3, pp.8-12.
Jiuhua Xu, Yuling Xie, Lijun Wang, Heping Zhu, and Liquan Wang, Rare earth elements in CO2-fluid inclusions in mantle Iherzolite, J. Univ. Sci. Technol. Beijing , 10(2003), No. 3, pp.8-12.
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Rare earth elements in CO2-fluid inclusions in mantle Iherzolite

摘要: Trace elements including REE (Rare Earth Elements) in fluid inclusions in lherzolite, olivine, orthopyroxene, and clinopy-roxene have been determined by heating-decrepitation and ICP-MS (Element Type Inductively Coupled Plasma-Mass Spectrometry)method. Normalized CO2 fluid/chondrite data show that mantle fluids are rich in REEs, especially LREEs (Light Rare Earth Ele-ments), several times or dozen times higher than mantle rocks and mantle mininerals. There are close relationships among the REE data of olivine, orthopyroxene, clinopyroxene and lherzolite. Compared to the data of chemical dissolution method, it is believed that REE data obtained from heating-decrepitation and ICP-MS technique are contributed by CO2 fluid inclusions. About 60% (mass fraction) of tiny inclusions are observed not to be decrepitated above 1000℃, so REE data obtained are only contributed by decrepi-tated inclusions. Mantle fluids rich in LREE play an important role in mantle metasomatism, partial melting and mineralization.

 

Rare earth elements in CO2-fluid inclusions in mantle Iherzolite

Abstract: Trace elements including REE (Rare Earth Elements) in fluid inclusions in lherzolite, olivine, orthopyroxene, and clinopy-roxene have been determined by heating-decrepitation and ICP-MS (Element Type Inductively Coupled Plasma-Mass Spectrometry)method. Normalized CO2 fluid/chondrite data show that mantle fluids are rich in REEs, especially LREEs (Light Rare Earth Ele-ments), several times or dozen times higher than mantle rocks and mantle mininerals. There are close relationships among the REE data of olivine, orthopyroxene, clinopyroxene and lherzolite. Compared to the data of chemical dissolution method, it is believed that REE data obtained from heating-decrepitation and ICP-MS technique are contributed by CO2 fluid inclusions. About 60% (mass fraction) of tiny inclusions are observed not to be decrepitated above 1000℃, so REE data obtained are only contributed by decrepi-tated inclusions. Mantle fluids rich in LREE play an important role in mantle metasomatism, partial melting and mineralization.

 

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