普洱、西双版纳地区的速度结构研究*

(1.昆明理工大学 建筑工程学院,云南 昆明 650093; 2.云南省地震局,云南 昆明 650224)

接收函数; 速度结构; 普洱、西双版纳地区

Study of the Velocity Structure in Pu'er and Xishuangbanna Aera
MAO Yan1,2,ZHENG Ding-chang2,LI Zheng-guang2,LU Ji-gao2

(1. The Architectural Engineering Institute of Kunming Science and Technology University,Kunming 650093,Yunnan,China)(2. Earthquake Administration of Yunnan Province,Kunming 650224,Yunnan,China)

receiver function; velocity structure; Pu'er and Xishuangbanna area

备注

利用接收函数方法对2008年普洱、西双版纳区域内6个台站接收到的远震数据进行反演,得到该研究区域内台站下方的速度结构。结果 表明:景谷、思茅台下方的莫霍面深度在36 km左右,区域南部的孟连、澜沧、勐腊台下方的地壳厚度有轻微变薄现象,为32 km,景洪台下方地壳厚度最薄,仅为30 km。

We invert the teleseismic records acquired in 2009 from six digital seismic stations such as Jinggu,Simao,Menglian,and Lancang in Pu'er and Xishuangbanna area by receiver function and get S-wave velocity structure beneath these six stations. The result indicates that the crust is 36km beneath Jinggu and Simao Station,and about 32 km beneath the Menglian,Lancang,and Mengla Station. The crust is getting thinner and thinner from North to South,and is only 30 km thick beneath the Jinghong Station.