| Sanidine—olivine—diopside Association in a Metasomatized Garnet Lherzolite Xenolith from Southeastern China |
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| 引用本文： | 曹荣龙 K.AOKI 等.Sanidine—olivine—diopside Association in a Metasomatized Garnet Lherzolite Xenolith from Southeastern China[J].中国地球化学学报,1992,11(1):55-69. |
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| 作者姓名： | 曹荣龙 K.AOKI |
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| 作者单位： | [1]InstiuteofGeochemistry,AcademiaSinica,GuangzhouBanch,Guangzhou510640 [2]InstituteofMineralogy,Petrology,andEconomicGeology,TohkuUniversity,Sendai,Japan |
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| 摘 要： | A garnet lherzolite xenolith hosted in olivine nephelinite from Xilong,Zhejiang Province ,southeastern China, shows clear evidence of modal metasomatism involving a special sanidine-olivine-diopside(SOD) association which was produced by replacement of primary orthopyroxene.The fluid responsible for the measomatism was a silica-undersaturated vapour,rich in K,Ba,Sr and Ti.It is suggested that the SOD assemblage is the product of metasomatism of a depleted lherzolite precursor,and formed in the upper mantle prior to entrainment and eruption.
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| 关 键 词： | 透长石 橄榄石 透辉石 交代变质作用 石榴石 铬尖晶石 捕虏体 中国 |
Sanidine-olivine-diopside association in a metasomatized garnet lherzolite xenolith from southeastern China |
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| Ronglong Cao,Shouhua Zhu,K. Aoki,H. Fujimaki.Sanidine-olivine-diopside association in a metasomatized garnet lherzolite xenolith from southeastern China[J].Chinese Journal of Geochemistry,1992,11(1):55-69. |
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| Authors: | Ronglong Cao Shouhua Zhu K Aoki H Fujimaki |
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| Institution: | (1) Institute of Geochemistry, Academia Sinica, Guangzhou Branch, 510640 Guangzhou;(2) Institute of Mineralogy, Petrology, and Economic Geology, Tohoku University, Sendai, Japan |
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| Abstract: | A garnet lherzolite xenolith hosted in olivine nephelinite from Xilong, Zhejiang Province, southeastern China, shows clear
evidence of modal metasomatism involving a special sanidine-olivine-diopside (SOD) association which was produced by replacement
of primary orthopyroxene. The fluid responsible for the metasomatism was a silica-undersaturated vapour, rich in K, Ba, Sr
and Ti. It is suggested that the SOD assemblage is the product of metasomatism of a depleted lherzolite precursor, and formed
in the upper mantle prior to entrainment and eruption. |
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