Research Projects
1. High resolution surface-wave array tomography in Southeastern Tibet from ambient seismic noise and two-station analysis. (with Prof. Rob van der Hilst)
For references:
1) Yao H. , van der Hilst R.D., and de Hoop, M.V..Surface-wave array tomography in SE Tibet from ambient seismic noise and two-station analysis : I - Phase velocity maps. 2006, Geophysical Journal International, Vol. 166, 732-744, doi: 10.1111/j.1365-246X.2006.03028.x
2) Yao H. , Beghein, C., and Van der Hilst, R.D., 2008, Surface-wave array tomography in SE Tibet from ambient seismic noise and two-station analysis: II 每 Crustal and upper mantle structure G.J.I., 2008, Vol.173 (1), 205-219, doi: 10.1111/j.1365-246X.2007.03696.x
Figure 1. (a) Geographic map of SW China and adjacent area. White lines show the
provincial boundaries of China; blue lines depict major rivers. The MIT-CIGMR
array stations are depicted as black triangles. The region bounded by the open black
rectangle is also shown in (b) for the detail of the tectonic structure. (b) Tectonic
elements and fault systems in the southeastern borderland of the Tibetan Plateau.
Tectonic boundaries (modified from Li, 1998 and Tapponnier et al., 2001) are shown
as dark green lines. The magenta shaded area shows the approximate region of the
Chuan-Dian Fragment. The major faults are depicted with black lines (after Wang et
al., 1998; Wang & Burchfiel, 2000; Shen et al, 2005). Abbreviations are: GZF 每
Ganzi Fault, LMSF 每 Longmenshan Fault, XSHF 每 Xianshuihe Fault, LTF 每 Litang
Fault, ANHF 每 Anninghe Fault, SMF 每 Shimian Fault, ZMHF 每 Zemuhe Fault, ZDF
每 Zhongdian Fault, LJF 每 Lijiang Fault, MLF 每 Muli Fault, DLF 每 Dali Fault, CHF 每
Chenghai Fault, LZJF 每 Luzhijiang Fault, PDHF 每 Pudude Fault, XJF 每 Xiaojiang
Fault, RRF 每 Red River Fault, CXB 每 Chuxiong Basin, and EHS 每 Eastern Himalaya
Syntaxis.
Figure 2. Variation of the Moho depth as inferred from the posterior mean model
using the NA at each grid point in the study area. The black lines are the
section
lines of the vertical profiles shown in Figure 4.
Figure 3. Variation in shear wavespeed relative to the posterior mean model inferred from the NA: (a) 10 km; (b) 25 km; (c) 50 km; (d) 75 km; (e) 100 km; and (f) 200 km. The major faults are depicted as thin black lines - for abbreviations see Figure 1b. The thick dark green lines are the block boundaries from the surface GPS data modeling (Shen et al., 2005). The abbreviations for subblocks are YJ (Yajiang), SH (Shangrilla), CY (Central Yunnan), LMS (Longmenshan), and BS (Baoshan) subblock (S-B). The white lines in (c) are the contour lines of Moho depth and the values are shown as the black numbers on them. The color bar in the right corner of each plot shows the value of shear wavespeed (km/s).
Figure 4. Shear wavespeed variation relative to the posterior mean model inferred from the NA along five vertical profiles (AA＊, BB＊, CC＊, DD＊, and EE＊ shown in the bottom of each plot; for location, see Figure 2). The wavespeed (km/s) color scale is shown in the right. Topography is depicted above each profile (black area) and the arrows above it mark the location of major faults along each profile. The abbreviations for fault names are the same as in Figure 1b. The black line (around 50 km depth) on each color profile indicates the Moho discontinuity.
2. Modeling crustal channel flow, crustal deformation and anisotropy with application to the Tibetan Plateau (with Prof. Bradford Hager)
General Exam Paper: 2-D modeling of crustal channel flow, finite deformation and anisotropy with applications to the Tibetan Plateau (not published)
Research Collaborations
1. Crust and Upper Mantle Structure beneath Southwest and Continental China from surface wave two-station analysis and ambient noise tomography
(with Senior Research Scientists Guixi Yi and Jun Fan in Sichuan Seismological Administration of China)
2. Surface wave tomography from Ambient Noise and two-station analysis beneathTaiwan and Taipei Basin ( with Yu-Chih Huang in Institute of Earth Science of Academia Sinica in Taiwan).