Crustal and uppermost mantle velocity structure and its relationship with the formation of ore districts in the Middle–Lower Yangtze River region

Seismic Imaging of Lithosphere Structure and Upper Mantle Deformation Beneath East‐Central China and Their Tectonic Implications

“…In the past two decades, many seismological studies in eastern China have been done, but most of those studies have focused on the eastern NCC and revealed that the eastern NCC experienced a large‐scale lithospheric thinning due to extensive cratonic reactivation during the Late Mesozoic (e.g., Chang et al, ; Chen, ; Lü et al, ; Ouyang et al, ; P. Xu et al, ; Zhao et al, ; Zheng et al, ). Due to sparse body wave coverage in the crust and uppermost mantle and surface wave attenuation and scattering at short periods, as well as limited data availability in the SCB, a detailed 3‐D structure from the shallow crust down to the uppermost mantle and deformation in eastern China are still poorly resolved.…”

“…In the past two decades, many seismological studies in eastern China have been done, but most of those studies have focused on the eastern NCC and revealed that the eastern NCC experienced a large-scale lithospheric thinning due to extensive cratonic reactivation during the Late Mesozoic (e.g., Chang et al, 2009;Chen, 2010;Lü et al, 2015;Ouyang et al, 2014;P. Xu et al, 2001;Zhao et al, 2007;Zheng et al, 2014).…”

A Broadband Seismic Network in the Middle-Lower Yangtze Metallogenic Belt, China

“…This network significantly increases the station coverage in the MLYMB and has successfully recorded continuous data since 2012. Many seismological methods can be applied (e.g., Ouyang et al, 2014) to obtain high-resolution structures in the crust and upper mantle and their relationships with generation of deep geodynamic processes and shallow ore formation.…”

“…By including those stations from our first phase deployment in the inversion (Ouyang et al, 2014), the lateral resolutions for ambient noise tomography and two-planewave tomography can reach ∼0:2°and 1°, respectively. Their high-resolution images showed a clear low-velocity zone in the upper mantle (∼100-200 km) beneath the MLYMB, which may be caused by partial melting of an enriched mantle source associated with subduction of ancient Pacific plate (Ouyang et al, 2014). Their results suggest that surface-wave tomography could provide useful information for better understanding of deep seismological structures and geodynamic processes beneath the MLYMB.…”

“…In a recent study (Ouyang et al, 2014), both ambient noise tomography and teleseismic two-plane-wave tomography are used to obtain phase velocities, and image the 3D shear structures of the lithosphere and underlying asthenosphere in this region. By including those stations from our first phase deployment in the inversion (Ouyang et al, 2014), the lateral resolutions for ambient noise tomography and two-planewave tomography can reach ∼0:2°and 1°, respectively.…”