CRUSTAL STRUCTURE OF BORNEO, MAKASSAR STAIT, AND SULAWESI FROM AMBIENT NOISE TOMOGRAPHY AND RECEIVER FUNCTION
Borneo and Sulawesi are two large islands separated by the Makassar Strait in a complex tectonic setting. Understanding the seismic structure in this region is still an interesting object of research due to limited data availability. In this study, 3-D Vs and radial anisotropy models have been ge...
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| Format: | Dissertations |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/86671 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Borneo and Sulawesi are two large islands separated by the Makassar Strait in a
complex tectonic setting. Understanding the seismic structure in this region is still
an interesting object of research due to limited data availability. In this study, 3-D
Vs and radial anisotropy models have been generated from the dispersion analysis
of Rayleigh and Love waves extracted from seismic noise recordings. Furthermore,
in this study, Moho depth and Vp/Vs ratio were also studied, which were inversed
from teleseismic earthquake event records using the receiver function method. The
model suggests that there is a wide and deep sedimentary basement at ~14 km depth
beneath the North Makassar Strait underlain by a shallow Moho layer at ~22 km
depth and a deep Moho layer (>40 km) beneath Central Sulawesi. The negative
anisotropy beneath the North Makassar Strait to Sulawesi is likely caused by rifting
of the Makassar rifting and this feature may play a role in the uplift of western
Central Sulawesi. |
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