| 山西裂谷带地壳岩石波速的研究 |
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| 引用本文： | 张友南,李彪.山西裂谷带地壳岩石波速的研究[J].地球物理学进展,1993(4). |
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| 作者姓名： | 张友南 李彪 |
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| 作者单位： | 国家地震局地质研究所，国家地震局地质研究所 北京 100029，北京 100029 |
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| 摘 要： | 通过实验建立了岩石成分与波速的关系,波速和岩石的各向异性,矿物相变在波速曲线中的反映以及实验温度和压力对波速的影响,尤其得到了高温下的新资料.用实验数据结合地球物理、地质资料建立了山西裂谷带与相邻太行山隆起区地壳各层圈的物质组成,对比说明,两构造单元下地壳的岩石组成是不同的.最后分析了盆地下地壳中部的组成、水和环境条件,认为低速带是由岩石部分熔融造成的.
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| 关 键 词： | 地壳 波速 物质组成 |
INVESTIGATION OF WAVE VELOCITY OF CRUSTAL ROCKS IN SHANXI RIFT ZONE |
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| Zhang Younang Li Biao.INVESTIGATION OF WAVE VELOCITY OF CRUSTAL ROCKS IN SHANXI RIFT ZONE[J].Progress in Geophysics,1993(4). |
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| Authors: | Zhang Younang Li Biao |
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| Abstract: | Some relations are set up by experiments between compositions of the rocks and their wave velocities,and between anisotropies of the rocks and their velocities.Phase transformation of some minerals areshown in the velocity curves,and effects of experimental temperatures and pressures on wave velocities areknown.Especially some completely new velocity data at high temperatures are exhibited.Components ofthe rocks of all layers in crust in Shanxi rift zone and Ta(?)ang Mountain uplift area are established usingexperimental data together with the references in geophysics and geology.It is indicated by contrast thatcompositions of the rocks at the lower crust in rift are different from that in Taihang Mountain uplift.Finally,through analysis of three conditions about composition of the rocks,the presence of water in themand their existing environment we suggested that low speed layer at lower crust of the rift is formed by par(?)tial melting of the rocks. |
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| Keywords: | Crust Wave velocity Component of rocks |
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