| Glass melt inclusion in clinopyroxene from Linqu Cenozoic basalt, Shandong Province, China |
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| 作者姓名： | ZHANG Hongfu Eizo Nakamura ZHANG Jin Ishikawa Akira |
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| 作者单位： | [1]State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China [2]Institute for Study of the Earth＇s Interior, Okayama University at Misasa, Tottori 682-0193, Japan |
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| 基金项目： | Acknowledgements Ma Yuguang and Mao Qian are thanked for their assistance in electron microprobe analyses at the State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences. The authors also greatly appreciate the constructive comments from Y. G Xu and other reviewers. This work was supported by the National Natural Science Foundation of China （Grant Nos. 40534022 and 40225009）. |
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| 摘 要： | Melt inclusions or glasses usually occur in spinel- facies peridotitic xenoliths entrained in the global ba- salts1―4], and olivine phenocrysts and/or xenocrysts carried in the intermediate-mafic volcanic rocks (such as basalts, basaltic andesites and h…
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| 关 键 词： | 新生代 玄武岩 斜辉石 玻璃熔体 地壳资源 山东 |
| 文章编号： | 10.1007/s11434-006-2058-4 |
| 收稿时间： | 2006-04-18 |
| 修稿时间： | 2006-04-182006-06-12 |
Glass melt inclusion in clinopyroxene from Linqu Cenozoic basalt, Shandong Province, China |
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| ZHANG Hongfu Eizo Nakamura ZHANG Jin Ishikawa Akira.Glass melt inclusion in clinopyroxene from Linqu Cenozoic basalt, Shandong Province, China[J].Chinese Science Bulletin,2006,51(15):1869-1876. |
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| Authors: | Hongfu Zhang Eizo Nakamura Jin Zhang Ishikawa Akira |
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| Institution: | (1) State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China;(2) Institute for Study of the Earth’s Interior, Okayama University at Misasa, Tottori 682-0193, Japan |
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| Abstract: | Cenozoic basalts from the Linqu County, Shandong Province, China entrain some clinopyroxene crystals, of which many contain
abundant glass melt inclusions. These melt inclusions are extremely irregular in shape with most grain sizes in a range of
10–50 μm and coexist with low-Mg# olivines, labradorites and Ca-rich potassium feldspars. In-situ major and trace element analyses show that the glass melt inclusions are high in alkalis (Na2O+K2O > 10 wt%), SiO2 (>54 wt%), CaO and FeO (>4 wt%), but low in MgO (Mg# < 20), and have LREE enrichments ((Ce/Yb)cn = 11.6–16.4) and apparently positive Eu anomalies (Eu/Eu* > 2), thus having phonolitic compositions. The compositional features
of clinopyroxene crystals, glass melt inclusions and their coexistent minerals suggest that these melt inclusions were exotic
melts in clinopyroxenes trapped prior to their entrainment in the host basalt. The discovery of these melt inclusions provides
a new approach to further investigating the evolution of Mesozoic lithospheric mantle beneath the southeastern North China
Craton. |
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| Keywords: | Linqu Cenozoic basalt clinopyroxene glass melt inclu- sion crustal source |
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