Other
Scientific paper
Nov 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3221315t&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 21, CiteID L21315
Other
2
Seismology: Body Waves, Seismology: Continental Crust (1219), Seismology: Tomography (6982, 8180)
Scientific paper
A joint imaging by teleseismic converted and multiple phases is put forward to image the crustal structure beneath the INDEPTH-III passive seismic profile in the central Tibet. A depth dependent Vp/Vs ratio is adopted to map common conversion point (CCP) via a Vp/Vs scanning and stacking approach. Our new crustal image shows that the crust is divided into two sections with different Moho depth distributions and amplitudes, with the boundary nearby the Bangong-Nujiang suture (BNS). A negative P-to-S amplitude band is located in the upper-to-middle crust, indicating a low velocity zone possibly caused by partial melting beneath the negative amplitude band. The average crustal Vp/Vs ratio estimated by our joint imaging method is higher than previous study, but is consistent with a partial melting middle-to-lower crust implied by many other results.
Teng Jiwen
Tian Xiaobo
Wu Qingju
Zeng Rongsheng
Zhang Zhongjie
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