| 中国东部随县─启东地带上地幔结构研究 |
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| 引用本文： | 郑晔,滕古文.中国东部随县─启东地带上地幔结构研究[J].地球物理学报,1994(4). |
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| 作者姓名： | 郑晔 滕古文 |
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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： | 随县─启东人工地震探测剖面长７００ｋｍ，穿越郯城─庐江深大断裂带．提取了该区莫霍界面以下上地幔中的反射界面信息，获得了上地幔的分层结构．结果表明，该区上地幔中有两个深度分别为７６ｋｍ和１００ｋｍ的界面．７６ｋｍ深度以下为一低速层，１００ｋｍ深度以下则为速度更低的低速层．该区岩石层厚度为７６ｋｍ，与华北地区相似，具有薄岩石层性质．
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| 关 键 词： | 岩石层，上地幔速度结构，低速层，郯庐构造带，随县． |
STUDY OF THE FINE STRUCTURE OF THE UPPER MANTLE IN THE SHUIXIAN-QIDONG AREA AT EAST PART OF CHINA |
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| ZENG YE,THNG JI-WEN.STUDY OF THE FINE STRUCTURE OF THE UPPER MANTLE IN THE SHUIXIAN-QIDONG AREA AT EAST PART OF CHINA[J].Chinese Journal of Geophysics,1994(4). |
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| Authors: | ZENG YE THNG JI-WEN |
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| Abstract: | The seismic profile more than 700km long from Shuixian to Qldong studied in this PaPer is located in the eastern China and intersects with the famous Tancheng-Lujiang tectonic belt.In this paper,the explosion seismology data of the profile have been analysed and studied in detail,the information from the reflectors beneath the Moho- discontinuity has been picked u,and the fine structure of the upper mantle in the area has been obtained.In the upper mantle,there are two interfaces, 76km and 100km deey resyectlvely.There is a low-velocity layer below 76km in depth. The velocity in the layer below 100km is even lower.It is indicated that the lithosphere 76km thick in the area is similar to that of the northern China. Both are comparatively thinner than those of the rest of the world. |
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| Keywords: | Lithosphere Veloclty structure Low velocity layer Tancheng-Lujiang tectonic belt |
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