Shear wave splitting

Meltzer A. and Christensen N. (2001) Nanga Parbat crustal anisotrophy implication for interpretation of crustal velocity structure and shear-wave splitting. Geophys. Res. Lett. 28(10), 2129 -2132. [Pg.1326]

In some ways the Superior Province appears different from other Archaean cratons worldwide. For example, it exhibits thicker than average crust and long uninterrupted geological belts, not commonly seen on other cratons. The Superior Province is also unusual in the sense that it exhibits very large shear-wave splitting values in the heart of the craton and very little in the surrounding Proterozoic Trans-Hudson shear zone. It is more normal for the surrounding mobile... [Pg.40]

Clitheroe, G. vander Hilst, R. D. 1998. Complex anisotropy in the Australian lithosphere from shear-wave splitting in broad-band SKS-records. [Pg.42]

Fouch, M. j., Fischer, K. M., Parmentier, E. M., Wysession, M. E. Clarke, T. J. 2000. Shear wave splitting, continental keels and patterns of mantle flow. Journal of Geophysical Research, 105, 6255-6276. [Pg.42]

Kay, I., Sol, S., Kendall, J.-M. 5 others 19996 Shear wave splitting observations in the Archean craton of Western Superior. Geophysical Research Letters, 26, 2669-2672. [Pg.43]

Savage, M. 1999. Seismic anisotropy and mantle deformation What have we learned from shear wave splitting Reviews of Geophysics, 37, 65-106. [Pg.43]

Silver, P. G. Savage, M. K. 1994. The interpretation of shear wave splitting parameters in the presence of two anisotropic layers. Geophysical Jourrml International, 199, 949-963. [Pg.43]

Barruol, G. Kern, H. 1996. Seismic anisotropy and shear-wave splitting in lower crust and upper-mantle rocks from the Ivrea Zone-experimental and calculated data. Physics of the Earth and Planetary Interiors, 95, 175-194. [Pg.132]

Fouch et al. (1999) compared model simulations of asthenospheric flow and seismic observations, and found that a significant proportion of the shear-wave splitting can be explained by the deflection of asthenospheric flow around a cratonic root. In our study we are interested in the extra complication of anisotropy in flowing mantle plume material that hes beneath and around continental keels. [Pg.136]

Upper-mantle anisotropy and shear-wave splitting... [Pg.144]

In a free-fall deployment, no method is known to assure that the OBS seismometers north axis is aligned with geographic north. For active-source experiments, the orientation of the horizontal components is not always important, but it is essential for many passive seismological methods (e.g., receiver functions, shear wave splitting). There are two main approaches to identify the OBS orientation direct determination by an additional sensor or indirect estimation by analyzing the seismological data. [Pg.1745]

Mt. Ruapehu volcano in the North Island of New Zealand has been the subject of some of the most comprehensive shear wave splitting studies of any volcano on Earth. Therefore, to illustrate the spatial versus temporal variation issue, anisotropy studies at Mt. Ruapehu will be explored. Temporal variation of shear wave splitting at Mt. Ruapehu was investigated by Miller and Savage (2001) and Gerst and Savage (2004). [Pg.2694]

Measuring Shear Wave Splitting Many methods have been developed to measure shear wave splitting in the Earth s crust (e.g., Crampin and Gao 2006). The goal is to identify the orientation of the fast split shear wave and the delay time between the fast and slow split shear waves. These parameters can then be used to infer rock properties such as crack distribution and... [Pg.2695]

Interpreting Shear Wave Splitting Some Assumptions... [Pg.2696]

Most shear wave splitting observations are interpreted under some assumptions, which are rarely completely true in the Earth ... [Pg.2696]

Shear wave splitting analysis is becoming a very popular method for determining seismic anisotropy in the cmst. This is in part due to the abundance of data and methods available and also to the relative insensitivity to the source-receiver geometry (other than deep enough earthquakes for the rays to arrive within the shear wave window) and independence from the need for dense networks of seismometers (see Seismic Network and Data Quality ). Another benefit of... [Pg.2696]

Temporal Variation of Shear Wave Splitting in the Crust... [Pg.2699]

Clear evidence has been obtained that crustal shear wave splitting can vary over short distances and can be caused by structural features in the... [Pg.2699]

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