| 中国晚新生代碱性玄武岩中贯穿双晶贵橄榄石 |
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| 引用本文： | 穆治国,刘如曦.中国晚新生代碱性玄武岩中贯穿双晶贵橄榄石[J].地质科学,1994,29(4):399-403. |
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| 作者姓名： | 穆治国 刘如曦 |
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| 作者单位： | 北京大学地质学系 北京 100871 |
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| 摘 要： | B80年代至今,在研究我国北方晚新生代碱性重武岩过程中,首先在内蒙的达里诺尔和黑龙江的科洛火山岩中观察到具贯穿双晶的贵橄榄石,最初认为是一种偶然现象。
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| 关 键 词： | 晚新生代 碱性玄武岩 贯穿双晶 贵橄榄石 中国 |
| 收稿时间： | 1992-06-02 |
| 修稿时间： | 1992-06-02; |
THE INJECTED TWIN CHRYSOLITES HOSTED IN LATECENOZOIC ALKALINE-BASALTS IN CHINA |
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| Mu Zhiguo,Liu Ruxi,Cao Zhengmin,Meng Guangxin.THE INJECTED TWIN CHRYSOLITES HOSTED IN LATECENOZOIC ALKALINE-BASALTS IN CHINA[J].Chinese Journal of Geology,1994,29(4):399-403. |
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| Authors: | Mu Zhiguo Liu Ruxi Cao Zhengmin Meng Guangxin |
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| Institution: | Department of Geology, Peking University Beijing 100871 |
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| Abstract: | Some chrysolites with an injected twin ones have been found in volcanic rocks in Keluo and Wudalianchi of Heilongjiang Province, in Dalinor of inner Mongolia Autonomous Region, in Kuandiang of Liaoning Province, in Luotuofeng of Hebei Province, in Kardaxi of Xinjiang Autonomous Region as well as in Gaojiang island of the Xisha islands of Hainan Province in the past few years, respectively. Four star-shaped and six star-shaped crystals were formed by a twining plane (031) while 2V angles ranged from 82?2? to 84?2?, negative. mineral. The results of electron probe analysis are: SiO2 38%-39 %, MgO 43%-44%, CaO 0.2%-0.4% and Fo 82-83. These injected twining chrysolites, as the first found, have some identical characteristics in genesis. They were formed in Late-Cenozoic, hosted in strongalkalinebasaltic rocks, and associated with both central eruption and stress. |
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| Keywords: | China Late-Cenozoic Alkaline-basalt Injected twin Chrysolite |
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