Thu Aug 14, F. Flechtner
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Baranov, Alexey, Bagherbandi, Mohammad, and Tenzer, Robert, 2018. Combined Gravimetric-Seismic Moho Model of Tibet. Geosciences, 8(12):461, doi:10.3390/geosciences8120461.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2018Geosc...8..461B,
author = {{Baranov}, Alexey and {Bagherbandi}, Mohammad and {Tenzer}, Robert},
title = "{Combined Gravimetric-Seismic Moho Model of Tibet}",
journal = {Geosciences},
keywords = {Moho, satellite gravity missions, seismic data, terrain model, Tibet},
year = 2018,
month = dec,
volume = {8},
number = {12},
eid = {461},
pages = {461},
abstract = "{Substantial progress has been achieved over the last four decades to
better understand a deep structure in the Himalayas and Tibet.
Nevertheless, the remoteness of this part of the world still
considerably limits the use of seismic data. A possible way to
overcome this practical restriction partially is to use products
from the Earth's satellite observation systems. Global
topographic data are provided by the Shuttle Radar Topography
Mission (SRTM). Global gravitational models have been derived
from observables delivered by the gravity-dedicated satellite
missions, such as the Gravity Recovery and Climate Experiment
(GRACE) and the Gravity field and steady-state Ocean Circulation
Explorer (GOCE). Optimally, the topographic and gravity data
should be combined with available results from tomographic
surveys to interpret the lithospheric structure, including also
a Moho relief. In this study, we use seismic, gravity, and
topographic data to estimate the Moho depth under orogenic
structures of the Himalayas and Tibet. The combined Moho model
is computed based on solving the Vening Meinesz-Moritz (VMM)
inverse problem of isostasy, while incorporating seismic data to
constrain the gravimetric solution. The result of the combined
gravimetric-seismic data analysis exhibits an anticipated more
detailed structure of the Moho geometry when compared to the
solution obtained merely from seismic data. This is especially
evident over regions with sparse seismic data coverage. The
newly-determined combined Moho model of Tibet shows a typical
contrast between a thick crustal structure of orogenic
formations compared to a thinner crust of continental basins.
The Moho depth under most of the Himalayas and the Tibetan
Plateau is typically within 60-70 km. The maximum Moho deepening
of \raisebox{-0.5ex}\textasciitilde76 km occurs to the south of
the Bangong-Nujiang suture under the Lhasa terrane. Local maxima
of the Moho depth to \raisebox{-0.5ex}\textasciitilde74 km are
also found beneath Taksha at the Karakoram fault. This Moho
pattern generally agrees with the findings from existing
gravimetric and seismic studies, but some inconsistencies are
also identified and discussed in this study.}",
doi = {10.3390/geosciences8120461},
adsurl = {https://ui.adsabs.harvard.edu/abs/2018Geosc...8..461B},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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