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．
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.
出处
《地球物理学报》
SCIE
EI
CSCD
北大核心
1994年第4期553-558,共6页
Chinese Journal of Geophysics
关键词
上地幔结构
岩石层
郑庐构造带
Lithosphere,Veloclty structure,Low velocity layer,Tancheng-Lujiang tectonic belt.
