I received Ph.D degree in seismology at Nanjing University. My research focuses on advancing seismic tomographic techniques for investigating earth’s internal structure. I specializes in full-waveform inversion using receiver function, surface wave and local earthquakes to image earth discontinuities, velocity structures and anisotropies.
From Dec 2021 to Jun 2024, I worked for Mathematical Imaging and Geophysics Group at Nanyang Technological University as a research fellow, supervised by Ping Tong.
Since Jul 2024, I have joined Department of Physics, University of Toronto as a postdoctoral fellow, working with Qinya Liu.
I am an advocate of open source as core developer of the Seispy in receiver functions processing and FWAT in full-waveform inversion.
Ph.D in Geology, 2021
Nanjing University
MSc in Geophysics, 2016
Nanjing University
Responsibilities include:
A new technique for P-wave receiver function (PRF) inversion, within the framework of wave equation-based adjoint tomography and referred to as receiver function adjoint tomography (RFAT), has been developed to obtain models of Vp, Vs, and density. This innovative technique fits the synthetic PRFs with observed PRFs and can better image the lateral variations of Vs from the crust to the uppermost mantle than traditional 1-D PRF inversion. We utilized RFAT to perform high-resolution imaging beneath a dense seismic array in Southeastern Tibet, revealing low-velocity zones extending from the uppermost mantle to the crust, as well as an eastward dipping Moho under the Red River Fault (RRF). Our inversion results provide direct evidence for the existence of a distinct asthenospheric upwelling channel beneath the RRF, and further highlight the effectiveness of RFAT for accurately imaging subsurface structures.
The Ailaoshan Red River shear zone (ARSZ) was formed in the Mesozoic as a suture zone between the Indochina block and the Yangtze craton. Since the Cenozoic, block extrusion due to the Indo-Asian collision has reactivated the fault zone and caused large-scale shearing. Affected by the Cenozoic orogeny, a large volume of magmatic and metamorphic rocks developed in the ARSZ, forming many orogenic gold deposits. However, the source and the geodynamic process of these magmatic activities are still unclear. To gain a basic understanding of the subsurface magmatic activity, we deployed a dense array of 24 broadband seismic stations across the Daping and Chang’an gold deposits at the southern end of the ARSZ. Receiver function analysis, common conversion point stacking, and a joint inversion of receiver functions and surface wave dispersions are performed to image the detailed structure of the crust and uppermost mantle. Low-velocity zones in the mid-lower crust and thinned lithosphere (∼70 km) are imaged under the ARSZ. The observed subsurface structures are verified by 3D numerical modeling with the SEM-FK method. We speculate that the mantle upwelling caused by lithospheric delamination has provided the main source of the mantle component in the magmatic rocks since ∼35 Ma; afterward, high temperatures produced partial melting in the lower crust, which was emplaced along active shear zones.
Source Codes
Seispy: Python module of seismology and receiver functions CCCN: Cross-Correlation for Coda and Noise BQMail: Python scripts to request seismic data from IRIS DMC
SurfATT: Surface wave Adjoint Travel-time Tomography
SplitRFLab: A Matlab toolbox of processing receiver functions and shear wave spliting
STALTA: Detecting microearthquakes using STA/LTA method RefATT: Adjoint Travel-time Tomography of Direct, Reflection, and Refraction phases