| 天池火山千年大喷发的岩浆混合作用与喷发机制初步探讨 |
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| 引用本文： | 樊祺诚,隋建立,孙谦,李霓,王团华.天池火山千年大喷发的岩浆混合作用与喷发机制初步探讨[J].岩石学报,2005,21(6):1703-1708. |
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| 作者姓名： | 樊祺诚 隋建立 孙谦 李霓 王团华 |
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| 作者单位： | 1. 中国地震局地质研究所,北京,100029
2. 中国科学院地质与地球物理研究所,北京,100029 |
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| 基金项目： | 国家自然科学基金资助项目（No.40372044） |
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| 摘 要： | 根据岩浆演化和地球物理深部探测，天池火山之下存在地壳和地幔双层岩浆房。地幔玄武质岩浆向地壳岩浆房的补给，保持了天池火山逾百万年持续不断的喷发活动。本文从天池火山千年大喷发浮岩中的玄武质粗安岩一粗安岩角砾和条带状岩浆的岩相学、矿物学和岩石化学研究，提出地幔的粗面玄武质岩浆向地壳岩浆房的注入，触发千年大喷发，初步探讨了天池火山千年大喷发的岩浆混合作用与喷发机制。
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| 关 键 词： | 浮岩 角砾和岩浆条带 岩浆混合作用 千年大喷发 天池火山 |
| 文章编号： | 1000-0569/2005/021(06)-1703-08 |
| 收稿时间： | 7/8/2005 12:00:00 AM |
| 修稿时间： | 11 7 2005 12:00AM |
Preliminary research of magma mixing and explosive mechanism of the Millennium eruption of Tianchi volcano |
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| FAN QiCheng,SUI JianLi,SUN Qian,LI Ni,WANG TuanHua.Preliminary research of magma mixing and explosive mechanism of the Millennium eruption of Tianchi volcano[J].Acta Petrologica Sinica,2005,21(6):1703-1708. |
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| Authors: | FAN QiCheng SUI JianLi SUN Qian LI Ni WANG TuanHua |
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| Institution: | 1. Institute of Geology, China Seismological Bureau, Beijing 100029, China; 2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | Studies on magma evolution and on geophysical observations indicate that there are two magma chambers beneath Tianchi volcano. Continuous basaltic magma influx from mantle chamber to crust chamber are essential to the keep Tianchi volcano active over a million years, and are also important to interpret the magma evolution of Tianchi volcano. In this paper, we present evidence of magma influx and magma mixing from the gray pumice of the Millennium eruption of Tianchi volcano. The breccias in the gray pumice and the banded structures indicate the occurrence of magma mixing. The petrological, mineralogical and chemical studies of these samples reveal the story of magma influx and mixing, which may trigger the Millennium eruption of Tianchi volcano. |
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| Keywords: | magma mixing the Millennium eruption Tianchi volcano |
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