成都理工大学学报（自然科学版）2012，Vol.39Issue(1)：49-54,6.
利用接收函数反演龙门山断裂带及邻区深部结构
Received function experiment for the Longmenshan fault zone and the deep structure of adjacent areas
摘要
Abstract
From September 2009 to April 2011, 18 broadband seismographs are placed in a profile acrossing Chengdu, Ziyang, Wenchuan, Heishui, Hongyuan and Maqu. The profile is about 500 km long. With the addition of 7 seismic stations which belong to the Sichuan provincial seismological bureau, the epicentral distance in 30°~90° and the magnitude greater than 5. 5 level, 261 earthquake events are selected to invert the deep structure of the Longmenshan fault zone and adjacent areas by the received function. The results of the study show that on the west margin of Yangtz platform, the Moho tilts to the west slowly, the depth changes from the 35 km to 45km, while near Dujiangyan and Wenchuan, the depth changes little. After crossing the Longmenshan central fault the Moho starts to drop, until Heishui (58 km) it begins to rise slowly. Compared with the inversion results in 2007, the following conclusions can be arrived: 1) Two profiles both show that the steep descent appears in the center of the Longmenshan nappe. It illustrates that the fault zone is the place where the crust has a sudden change. 2) To the south, the depth of the Moho tilts down 68 km, then rises, but to the north, the depth of the Moho tilts down 58 km, then rises. So this paper considers that on the eastern margin of the Songpan-Ganzi massif, the thickness of the crust shows that the south is thick and the north thin and the east is thick and the west thin.关键词
被动源/龙门山断裂带/接收函数法/深部结构Key words
passive source/ Longmenshan fault zone/ received function/ deep structure分类
天文与地球科学引用本文复制引用
王成,朱介寿,宋文杰,江晓涛..利用接收函数反演龙门山断裂带及邻区深部结构[J].成都理工大学学报（自然科学版）,2012,39(1):49-54,6.基金项目
国家自然科学基金资助项目(40839969,41074062) （40839969,41074062）
