| 对喜马拉雅地区地壳热状态的初步估计 |
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| 引用本文： | 李鸿吉.对喜马拉雅地区地壳热状态的初步估计[J].地球物理学报,1983,26(3):249-255. |
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| 作者姓名： | 李鸿吉 |
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| 作者单位： | 中国科学院地球物理研究所 |
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| 摘 要： | 本文考虑放射性热源,采用非线性稳态有限单元法估算了喜马拉雅地区地壳的温度分布和地表热流值。 喜马拉雅山南、北有不同的地壳温度结构,南部等温线比较均匀,地表热流值低于1.5HFU;北部地表下20公里以上等温线成密集型分布,20公里以下成环状分布,地表热流值从1.5HFU至2.1HFU。根据等温线圈出西藏南部地区地壳内可能存在局部熔融的部位,并与其他地球物理资料作了比较。
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| 关 键 词： | 喜马拉雅地区 地壳 热状态 局部熔融 藏南地区 地球物理学报 导热率 放射性生热 地表热流值 花岗岩层 |
| 收稿时间： | 1982-02-02 |
PRELIMINARY ESTIMATION TO THE CRUSTAL THERMAL STATE OF THE HIMALAYAN REGION |
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| LI HONG-JI.PRELIMINARY ESTIMATION TO THE CRUSTAL THERMAL STATE OF THE HIMALAYAN REGION[J].Chinese Journal of Geophysics,1983,26(3):249-255. |
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| Authors: | LI HONG-JI |
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| Institution: | Institute of Geophysics, Academia Sinica |
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| Abstract: | The crustal temperature distribution and conductive heat flows of the Himalayan region were estimated by non-linear finite element method.There are different crustal temperature structures in the Himalayan region. The temperature contour lines on the south of the Himalayan mountain range are relatively even and the conductive heat flows are less than 1.5 HFU, whereas on the north, the distribution of contour lines are clearly concentrated from the earth surface to 20 km depth. However, the contour lines below 20 km are circularly distributed. The conductive heat flows on the north of Himalayan mountain range are from 1.5 HFU to 2.1 HFU.Based upon the analysis of the distribution of the temperature contour lines, a possible partial melting area has been drawn in the southern part of Xizang plateau and the result of this analysis ha,s been compared with those obtained from other geological and geophysical data. |
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