Upwelling mantle plume and lithospheric delamination beneath the North China Craton
| Autor: | Chuansong He |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Physics and Astronomy (miscellaneous) Lehmann discontinuity North china Astronomy and Astrophysics 010502 geochemistry & geophysics 01 natural sciences Mantle plume Paleontology Craton Geophysics Space and Planetary Science Lithosphere Delamination (geology) Upwelling Keel (bird anatomy) Geology 0105 earth and related environmental sciences |
| Zdroj: | Physics of the Earth and Planetary Interiors. 306:106548 |
| ISSN: | 0031-9201 |
| DOI: | 10.1016/j.pepi.2020.106548 |
| Popis: | Various models have been proposed for the destruction of the Eastern North China Craton (NCC); however, it is still a highly controversial scientific issue. In this study, abundant teleseismic data recorded by permanent and temporary stations in the NCC were collected, and P-wave tomography and common conversion point (CCP) stacking of receiver functions were performed. The results from this study reveal an upwelling mantle plume and a shallow Lehmann discontinuity (or the lower boundary of a low-velocity zone) beneath the Eastern NCC. Additionally, a large-scale, plate-like high-velocity anomaly is defined under the Eastern NCC that might be related to the delamination of a lithospheric keel. Based on the above results and assessment, NCC destruction might include two causes: lithospheric keel removal or delamination and mantle plume upwelling. |
| Databáze: | OpenAIRE |
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