Crustal Anisotropy Beneath the Trans-North China Orogen and its Adjacent Areas From Receiver Functions

As an important segment of the North China Craton, Trans-North Orogen (TNCO) has experienced strong tectonic deformation and magmatic activities since Cenozoic is characterized by significant seismicity. To understand mechanism crustal seismic hazards, we determined thickness ( H ), Vp / Vs ratio κ ) anisotropy (the fast polarization direction φ splitting time τ beneath TNCO its adjacent areas analyzing receiver function data recorded a dense array. The , at total 309 stations were measured, respectively. Moho depth varies from ∼30 km western margin Bohai bay basin to maximum value ∼48 northern Lüliang Mountain, which shows positive negative correlations with elevation Bouguer anomaly. average roughly parallel strikes faults, grabens Mountains in this study area, whereas rotating distribution shown around Datong-Hannuoba volcanic regions. Based on measured Ps SKS/SKKS phases, propose that hazards could be due counterclockwise rotation Ordos block driven far-field effects India-Eurasian collision.