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- W3199004895 endingPage "1053" @default.
- W3199004895 startingPage "1038" @default.
- W3199004895 abstract "SUMMARY We have formulated a 2-D Sn attenuation tomographic model to investigate the uppermost mantle shear wave Q and its tectonic implications beneath southeastern Tibet near Namche Barwa. To achieve our objective, we first compute interstation Q values using the two station method (TSM) analysis on 618 station pairs obtained from 26 regional earthquakes (Mw ≥5.5) with epicentral distances ranging from 5° to 15° recorded at 47 seismic stations belonging to the Namche Barwa network (XE network, 2003−2004). Furthermore, the QSn tomographic model is generated by utilizing these interstation Q values. QSn values are varying from 101 to 490 in the region. The tomography image reveals high attenuation (≤200 Q values) in the central region. Regions of low attenuation (>200 Q values) are observed in the southern part and in some small regions beneath the northern side of the study area. Consecutive high-low-high QSn values have been observed in the south part of the Lhasa block. The obtained QSn values, along with the prior isotropic Pn velocity model of the study area, indicate that the scattering effect is causing significant Sn wave energy dissipation due to structural heterogeneity present in the uppermost mantle beneath the region. This may be the result of the break-up of the subducting Indian Plate beneath the area." @default.
- W3199004895 created "2021-09-27" @default.
- W3199004895 creator A5005875978 @default.
- W3199004895 creator A5044476606 @default.
- W3199004895 creator A5056568681 @default.
- W3199004895 creator A5067347674 @default.
- W3199004895 creator A5070951223 @default.
- W3199004895 creator A5071719457 @default.
- W3199004895 date "2021-09-22" @default.
- W3199004895 modified "2023-09-25" @default.
- W3199004895 title "Sn attenuation tomography of southeastern Tibet: new constraints on lithospheric mantle deformation" @default.
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