| 阿尔山火山区地壳上地幔电性结构初探 |
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| 引用本文： | 汤吉,王继军,陈小斌,赵国泽,詹燕.阿尔山火山区地壳上地幔电性结构初探[J].地球物理学报,2005,48(1):196-202. |
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| 作者姓名： | 汤吉 王继军 陈小斌 赵国泽 詹燕 |
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| 作者单位： | 中国地震局地质研究所,北京,100029;中国地震局地质研究所,北京,100029;中国地震局地质研究所,北京,100029;中国地震局地质研究所,北京,100029;中国地震局地质研究所,北京,100029 |
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| 基金项目： | 国家自然科学基金项目 (4 0 2 740 17)资助 |
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| 摘 要： | 在阿尔山活火山区一条北北西向测线上进行了7个大地电磁测深点的观测。2-D解释结果表明，研究区内新、老两条火山带可能存在通往深部的岩浆通道。其中，新发现的活火山带地下在10~12km还保持着较高的热状态，很可能富含流体，在30~50km处可能是地幔向上的供热通道；而老火山带30km以上可能存在一个正在冷却的岩浆通道，两条火山条带的深部可能是同源的。
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| 关 键 词： | 阿尔山火山 大地电磁测深 低阻带(体) 岩浆通道 |
| 文章编号： | 0001-5733(2005)01-0196-07 |
| 收稿时间： | 2003-03-02 |
| 修稿时间： | 2004-09-17 |
PRELIMINARY INVESTIGATION ON ELECTRICITY STRUCTURE OF THE CRUST AND UPPER MANTLE IN ARXAN VOLCANIC AREA |
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| TANG Ji,WANG Ji-Jun,CHEN Xiao-Bin,ZHAO Guo-Ze,ZHAN Yan Institute of Geology,China Earthquake Administration,Beijing ,China.PRELIMINARY INVESTIGATION ON ELECTRICITY STRUCTURE OF THE CRUST AND UPPER MANTLE IN ARXAN VOLCANIC AREA[J].Chinese Journal of Geophysics,2005,48(1):196-202. |
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| Authors: | TANG Ji WANG Ji-Jun CHEN Xiao-Bin ZHAO Guo-Ze ZHAN Yan Institute of Geology China Earthquake Administration Beijing China |
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| Institution: | Institute of Geology, China Seismological Bureau, Beijing，100029 |
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| Abstract: | Magnetotelluric (MT) measurement has been carried out at 7 sites along a profile in NNW direction in Arxan active volcanic area. The data were processed and analyzed by using a two-dimensional (2-D) inversion. The obtained 2-D result shows that two volcanic zones, the older and younger volcanic zones with their magma conduits down to depth, exist in the study area. Of them a newly found younger active volcanic zone still maintains its higher temperature state at depth of 10-12 km, where may exists an abundant fluid, and a conduit for supplying heat from the mantle to the crust exists at depth of 30~50 km. But a magma conduit being in cooling may exist down to depth of 30 km beneath the older volcanic zone. The two volcanic zones may have the same resource at depth. |
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| Keywords: | Aershan volcano MT Low resistivity belt(body) Magma path |
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