| 岩石圈的热-机械侵蚀和化学侵蚀与岩石圈减薄 |
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| 引用本文： | 徐义刚.岩石圈的热-机械侵蚀和化学侵蚀与岩石圈减薄[J].矿物岩石地球化学通报,1999(1). |
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| 作者姓名： | 徐义刚 |
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| 作者单位： | 中国科学院广州地球化学研究所 |
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| 摘 要： | 岩石圈减薄及其对区域构造岩浆演化的控制是近十几年来深部研究中所取得的重要成果。我国华北地区岩石圈的厚度、物质组成和热状态在近４００Ｍａ来有过剧烈的变化；由古生代时大于２００ｋｍ的厚度和方辉橄榄岩为主的物质组成演化为现今１００ｋｍ左右的厚度和以二辉橄...
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| 关 键 词： | 橄榄岩包体 热-机械侵蚀 化学侵蚀 岩石圈减薄 |
Roles of Thermo mechanic and Chemical Erosion in Continental Lithospheric Thinning |
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| Xu Yigang.Roles of Thermo mechanic and Chemical Erosion in Continental Lithospheric Thinning[J].Bulletin of Mineralogy Petrology and Geochemistry,1999(1). |
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| Authors: | Xu Yigang |
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| Abstract: | The conversion from thick cratonic lithosphere to thin oceanic lithosphere presents a major problem in the study of mechanism of continental lithospheric thinning. It is pointed out that the popular delamination model cannot be directly applied to the lithospheric thinning processe because of the unfavorable density contrast between cratonic lithosphere and asthenosphere. Based on recent studies on peridotite xenoliths and massifs as well as theoretical modeling results, it is believed that thermomechanic and chemical erosion play very important roles in lithospheric thinning. A model involving interacting thermo mechanic erosion and chemical erosion is tentatively proposed. |
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| Keywords: | peridotite xenoliths thermo mechanic erosion chemical erosion lithospheric thinning |
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