Back to Search
Start Over
Two anisotropic layers in central orogenic belt of North China Craton
- Source :
-
Tectonophysics . Oct2010, Vol. 494 Issue 1/2, p138-148. 11p. - Publication Year :
- 2010
-
Abstract
- Abstract: We present evidence of two layers of anisotropy in Earth''s upper mantle beneath the central orogenic belt of the North China Craton from teleseismic shear-wave splitting analysis. A one-layer model is in disagreement with the well-constrained azimuth-dependent splitting parameters for stations in the central orogenic belt; however, two layers of anisotropy improve the fit to the data. At the bottom layer, the fast polarization directions are subparallel to the absolute plate motion, indicating the presence of the current strain within the subcratonic asthenosphere related to the interactions between the surrounding plates. In contrast, at the top layer, the fast polarization directions are consistent with the strikes of the local surface faults, confirming a combined contribution of the past orogenies in the lithosphere. [Copyright &y& Elsevier]
- Subjects :
- *ANISOTROPY
*OROGENY
*AZIMUTH
*CRATONS
*SHEAR waves
*STRUCTURAL geology
Subjects
Details
- Language :
- English
- ISSN :
- 00401951
- Volume :
- 494
- Issue :
- 1/2
- Database :
- Academic Search Index
- Journal :
- Tectonophysics
- Publication Type :
- Academic Journal
- Accession number :
- 54482343
- Full Text :
- https://doi.org/10.1016/j.tecto.2010.09.002