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characteristics of metasomatism
相关语句
  交代作用特性
     Characteristics of Metasomatism Associated with Uranium Mineralization in the Guidong Granitic Body
     贵东岩体铀成矿交代作用特性研究
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  相似匹配句对
     The characteristics of G.
     论文首先对语音编码的各种方案进行了比较,并对G.
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     characteristics;
     三、发展的特点;
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     And the characteristics of the G.
     通过仿真和实验,也验证了G.
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     There are following characteristics:
     该设备具有以下主要特点:
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     MANTLE METASOMATISM
     地幔交代作用
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Laser-fluorination technique has been used to determine the O-isotopic ratios of mineral separates from mantle-derived xenoliths from the Yitong.Jilin Province. Mineral δ18O values for the granular lherzolites are well within the variation range obtained by Mattey et al.(1994)for worldwide peridotites.Specifically, the observed fractionation sequence between coexisting minerals is the same as that expected from theoretical and experimental consideration, suggesting oxygen isotopic homogeneity of the upper mantle.In...

Laser-fluorination technique has been used to determine the O-isotopic ratios of mineral separates from mantle-derived xenoliths from the Yitong.Jilin Province. Mineral δ18O values for the granular lherzolites are well within the variation range obtained by Mattey et al.(1994)for worldwide peridotites.Specifically, the observed fractionation sequence between coexisting minerals is the same as that expected from theoretical and experimental consideration, suggesting oxygen isotopic homogeneity of the upper mantle.In the case of highly sheared samples,disequilibrium is believed to exist because the δ18O ratios of olivine neoblasts (in porphyroclastic samples)are systematically lower(by ca.0.2‰)than olivine porphyroclasts in the same samples.We invoke open system exchange between the metasomatic fluid and the peridotite protolith.Consistent with the transient characteristic of metasomatism observed in sheared peridotites, this suggests that metasomatism was contemporaneous with shear deformation and that this occurred just before eruption of the host basalts.

吉林伊通幔源包体的氧同位素组成徐义刚,M.A.MenziesD.P.Mattey林传勇(中国科学院广州地球化学研究所,广州510640)(DepartmentofGeology,RoyalHollowayUniversityofLondon,Egha...

 
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