| 郯庐断裂带火山活动与深部地质过程的新认识 |
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| 引用本文： | 牛漫兰,朱光,宋传中,王道轩,刘国生.郯庐断裂带火山活动与深部地质过程的新认识[J].地质科技情报,2000,19(3):21-26. |
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| 作者姓名： | 牛漫兰 朱光 宋传中 王道轩 刘国生 |
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| 作者单位： | 合肥工业大学资源与环境科学系,安徽,合肥,230009 |
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| 基金项目： | 国家自然科学基金资助项目!( 4 9872 0 74) |
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| 摘 要： | 在郯庐断裂带中生代以来的三期演化中，都伴生了火山活动。早白垩世走滑期的火山活动起源于地幔底侵、壳幔相互作用下的壳幔过渡带，也指示此时的断裂带切入到壳幔边界。断裂带内新生代玄武岩喷发起始于强烈伸展的后期（古新世），在随后的断裂挤压期达到高温，该玄武岩喷发不但反映了断裂带已深切至上地幔，出现了地幔剪切带，也显示地幔交代，混杂地幔区等重要的深部过程信息。
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| 关 键 词： | 郯庐断裂带 火山活动 岩浆起源 深部地质 |
VOLCANIC ACTIVITIES AND DEEP GEOLOGICAL PROCESSES IN THE TAN-LU FAULT ZONE |
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| Niu Manlan,Zhu Guang,Song Chuanzhong,Wang Daoxuan,Liu Guosheng.VOLCANIC ACTIVITIES AND DEEP GEOLOGICAL PROCESSES IN THE TAN-LU FAULT ZONE[J].Geological Science and Technology Information,2000,19(3):21-26. |
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| Authors: | Niu Manlan Zhu Guang Song Chuanzhong Wang Daoxuan Liu Guosheng |
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| Abstract: | Three stages of Meso Cenozoic evolution in the Tan Lu fault zone were all associated with volcanic activities.Early Cretaceous volcanic activities during the strike slip stage originated from the transitional zone between the crust and mantle through underplating and mutual action of the crust and mantle.They also demonstrate that the fault zone cut into the boundary of the crust and mantle.Cenozoic basalt eruption in the fault zone started from the later stage of extension (Paleocene),and reached its eruption peak during the following compressive stage.The basalt eruption suggests that the fault zone reached deeply into the upper mantle and caused the mantle shear zone,and shows important deep process information such as mantle metasomatism and mixed mantle regions. |
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| Keywords: | Tan Lu fault zone volcanic activity magma origination fault depth deep process |
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