| 古震源实体初步研究 |
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| 引用本文： | 张家声,周春平.古震源实体初步研究[J].地震地质,1992,14(2):165-175,T002. |
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| 作者姓名： | 张家声 周春平 |
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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，国家地震局地质研究所 北京 100029，北京 100029，北京 100029 |
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| 摘 要： | 古震源区地震断裂成因的假玄武玻璃显微构造、基质成分及其与区域构造演化关系的研究表明.随地壳抬升和相应的温度降低,在大约10～15km的深度上,长石质岩石先于石英质岩石从韧性转变为脆性性状,是导致韧性剪切带中局部应变不稳定和地震发生的主要原因。对地震断层岩石的多样性和地震成因的二相变形理论模型进行了讨论
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| 关 键 词： | 震源实体 假玄武玻璃 糜棱岩 大别山 |
PRELIMINARY STUDY ON AN ANCIENT SEISMIC SOURCE SUBSTANCE |
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| Zhang Jiasheng Zhou Chunping Yang Guizhi.PRELIMINARY STUDY ON AN ANCIENT SEISMIC SOURCE SUBSTANCE[J].Seismology and Geology,1992,14(2):165-175,T002. |
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| Authors: | Zhang Jiasheng Zhou Chunping Yang Guizhi |
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| Affiliation: | Institute of Geology.State Seismological Bureau.Beijing 100029 |
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| Abstract: | Studies on the microstructure and matrix composition of fault-generated pseudotachy-lites,as well as their structural relationships in an ancient seismic source region,have revealed that deformation behaviour of the feldspar-bearing rocks transformed from ductility to rigidity prior to quartz-bearing rocks in a ductile shear zone at a crust depth rangeing from 15 to 10 km,along with crust uplifting and corresponding decreasing in temperature,would cause a strain instability somewhere and then the earthquake occurred.Varieties of the seismic fault-generated rocks and a dualistic deformation model have been discussed. |
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| Keywords: | Seismic source substance Pseudotachylite Mylonite Dabie Mountain |
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