| 长白山天池火山区长白-敦化剖面结晶基底的探测和研究 |
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| 引用本文： | 潘素珍,张先康,杨卓欣,张成科,赵金仁,潘纪顺,任青芳,张建狮.长白山天池火山区长白-敦化剖面结晶基底的探测和研究[J].地震研究,2003,26(3):271-274. |
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| 作者姓名： | 潘素珍 张先康 杨卓欣 张成科 赵金仁 潘纪顺 任青芳 张建狮 |
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| 作者单位： | 1. 中国科学技术大学地球和空间科学学院,合肥,230026;中国地震局地球物理勘探中心,郑州,450002
2. 中国地震局地球物理勘探中心,郑州,450002 |
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| 摘 要： | 时间项分析法中，应用广义最小二乘法进行反演，对长白山天池火山区岩浆系统的长白—敦化(L1)剖面的Pg波到时进行了计算处理，得到了Pg波时间项及基底速度值；取上部地壳的介质平均速度为4．5km/s，经反演求得了各点的深度值，给出了长白山天池火山区结晶基底的厚度分布。结晶基底厚度一般在2．0km左右，而在长白山天池下方结晶基底最厚处接近4．0km；在万宝和敦化附近各有一不太明显的凹陷，其原因可能与在这两个位置处有几条断裂穿过有关。
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| 关 键 词： | 长白山天池火山区 长白—敦化剖面 火山探测 结晶基底 广义最小二乘法 岩浆系统 时间项反演法 Pg波 |
A Sounding Research of Crystalline Basement Along the Changbai-Dunhua Profile in Tianchi Volcanic Region in Mt.Changbaishan |
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| Pan Suzhen , Zhang Xiankang Yang Zhuoxin Zhang Chengke Zhao Jinren Pan Jishun Ren Qingfang Zhang Jianshi.A Sounding Research of Crystalline Basement Along the Changbai-Dunhua Profile in Tianchi Volcanic Region in Mt.Changbaishan[J].Journal of Seismological Research,2003,26(3):271-274. |
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| Authors: | Pan Suzhen Zhang Xiankang Yang Zhuoxin Zhang Chengke Zhao Jinren Pan Jishun Ren Qingfang Zhang Jianshi |
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| Institution: | Pan Suzhen 1,2 Zhang Xiankang 2 Yang Zhuoxin 2 Zhang Chengke 2 Zhao Jinren 2 Pan Jishun 2 Ren Qingfang 2 Zhang Jianshi 2 1.The Department of Earth and Space of USTC,Hefei 230026,China 2.Research Center of Exploration Geophysics,CSB,Zhengzhou 450002,China |
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| Abstract: | Using Generalized Least Squares Criterion in the time term inversion,the velocity of basement is obtained by the computation to the Changbai-Dunhua profile in the Tianchi volcanic region of Mt.Changbaishan.The average velocity of upper crust which is selected is 4.5km/s.Thus the depth of each point is obtained.The results show that the thickness of the bottom is 2.0km or so in this region.But it is up to 4.0km under the Tianchi and it thickens in Wanbao and Duuhua region,because it is the place where many fault zones cross. |
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| Keywords: | Generalized Least Squares Inversion magma system crystalline basement volcanic zone of Mt Changbaishan |
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