Structure of the Sediment and Crust in the Northeast North China Craton from Improved Sequential H-k Stacking Method

Abstract H-k stacking method is a standard receiver-function method to detect crustal thickness. But this method can not be applied in low-velocity sedimentary basins. To solve this problem, we propose an improved sequential H-k stacking method. The improved method needs two sequential stacks. Firstly, sediment structure is calculated using converted waves and multiples on the bottom boundary of sediments. Secondly, the sedimentary results are applied to calculate the crustal structure. Theoretical calculations and “recovery tests” indicate that the improved method can obtain accurate estimates in sedimentary basins. With the teleseismic data of North China Craton, the structure of sediments is thick in the depression and thin in the uplifted area, which is consistent with Deep Seismic Sounding results. The crust to the west of the North-South Gravity Lineament is relatively thick and has a low average Poisson ratio, whereas the east is relatively thin and has a high average Poisson ratio. This result and the structural feature from data regression imply that the eastern crust of the North China Craton has experienced wide extension, which reflect the crustal response to the severe destruction and deformation in that area compared to the western crust.

Download Full-text

Crust-mantle velocity structure in Shanxi rift, Central North China Craton

10.5194/egusphere-egu2020-20659 ◽

2020 ◽

Author(s):

Yan Cai ◽

Jianping Wu

Keyword(s):

Upper Mantle ◽

High Velocity ◽

North China Craton ◽

Lower Crust ◽

North China ◽

Velocity Structure ◽

Low Velocity ◽

Crust And Upper Mantle ◽

The North ◽

Shanxi Rift

<p>North China Craton is the oldest craton in the world. It contains the eastern, central and western part. Shanxi rift and Taihang mountain contribute the central part. With strong tectonic deformation and intense seismic activity, its crust-mantle deformation and deep structure have always been highly concerned. In recent years, China Earthquake Administration has deployed a dense temporary seismic array in North China. With the permanent and temporary stations, we obtained the crust-mantle S-wave velocity structure in the central North China Craton by using the joint inversion of receiver function and surface wave dispersion. The results show that the crustal thickness is thick in the north of the Shanxi rift (42km) and thin in the south (35km). Datong basin, located in the north of the rift, exhibits large-scale low-velocity anomalies in the middle-lower crust and upper mantle; the Taiyuan basin and Linfen basin, located in the central part, have high velocities in the lower crust and upper mantle; the Yuncheng basin, in the southern part, has low velocities in the lower crust and upper mantle velocities, but has a high-velocity layer below 80 km. We speculate that an upwelling channel beneath the west of the Datong basin caused the low velocity anomalies there. In the central part of the Shanxi rift, magmatic bottom intrusion occurred before the tension rifting, so that the heated lithosphere has enough time to cool down to form high velocity. Its current lithosphere with high temperature may indicate the future deformation and damage. There may be a hot lithospheric uplift in the south of the Shanxi rift, heating the crust and the lithospheric mantle. The high-velocity layer in its upper mantle suggests that the bottom of the lithosphere after the intrusion of the magma began to cool down.</p>

Download Full-text

Destruction of the North China Craton: a perspective based on receiver function analysis

Geological Journal ◽

10.1002/gj.2530 ◽

2013 ◽

Vol 50 (1) ◽

pp. 93-103 ◽

Cited By ~ 14

Author(s):

Chuansong He ◽

Shuwen Dong ◽

M. Santosh ◽

Qiusheng Li ◽

Xuanhua Chen

Keyword(s):

North China Craton ◽

North China ◽

Receiver Function ◽

Function Analysis ◽

The North ◽

Receiver Function Analysis

Download Full-text

Discontinuity structure of the mantle transition zone beneath the North China Craton from receiver function migration

Journal of Geophysical Research Atmospheres ◽

10.1029/2008jb006221 ◽

2009 ◽

Vol 114 (B6) ◽

Cited By ~ 53

Author(s):

Ling Chen ◽

Yinshuang Ai

Keyword(s):

Transition Zone ◽

North China Craton ◽

North China ◽

Receiver Function ◽

Mantle Transition Zone ◽

The North ◽

Discontinuity Structure

Download Full-text

Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton

Scientific Reports ◽

10.1038/s41598-021-92048-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Xingpeng Dong ◽

Dinghui Yang ◽

Fenglin Niu ◽

Shaolin Liu ◽

Ping Tong

Keyword(s):

North China Craton ◽

Lithospheric Mantle ◽

North China ◽

Three Dimensional ◽

Mantle Flow ◽

S Wave ◽

Low Velocity ◽

Traveltime Tomography ◽

Velocity Anomaly ◽

The North

AbstractThe North China craton (NCC) was dominated by tectonic extension from late Cretaceous to Cenozoic, yet seismic studies on the relationship between crust extension and lithospheric mantle deformation are scarce. Here we present a three dimensional radially anisotropic model of NCC derived from adjoint traveltime tomography to address this issue. We find a prominent low S-wave velocity anomaly at lithospheric mantle depths beneath the Taihang Mountains, which extends eastward with a gradually decreasing amplitude. The horizontally elongated low-velocity anomaly is also featured by a distinctive positive radial anisotropy (VSH > VSV). Combining geodetic and other seismic measurements, we speculate the presence of a horizontal mantle flow beneath central and eastern NCC, which led to the extension of the overlying crust. We suggest that the rollback of Western Pacific slab likely played a pivotal role in generating the horizontal mantle flow at lithospheric depth beneath the central and eastern NCC.

Download Full-text

Wave-equation Traveltime Tomography Unravels a Scenario of Horizontal Mantle Flow Beneath the North China Craton

10.21203/rs.3.rs-250919/v1 ◽

2021 ◽

Author(s):

Xingpeng Dong ◽

Dinghui Yang ◽

Fenglin Niu ◽

Shaolin Liu ◽

Ping Tong

Keyword(s):

Wave Equation ◽

North China Craton ◽

Lithospheric Mantle ◽

North China ◽

Mantle Flow ◽

S Wave ◽

Low Velocity ◽

Traveltime Tomography ◽

Velocity Anomaly ◽

The North

Abstract The North China craton (NCC) was dominated by tectonic extension from late Cretaceous to Cenozoic, yet seismic studies on the relationship between crust extension and lithospheric mantle deformation are scarce. Here we present a three dimensional radially anisotropic model of NCC derived from wave-equation traveltime tomography to address this issue. We find a prominent low S-wave velocity anomaly at lithospheric mantle depths beneath the Taihang Mountains, which extends eastward with a gradually decreasing amplitude. The horizontally elongated low-velocity anomaly is also featured by a distinctive positive radial anisotropy (VSH>VSV). Combining geodetic and other seismic measurements, we speculate the presence of a horizontal mantle flow beneath central and eastern NCC, which led to the extension of the overlying crust. We suggest that the rollback of Western Pacific slab likely played a pivotal role in generating the horizontal mantle flow at lithospheric depth beneath the central and eastern NCC.

Download Full-text