TY - ABST
T1 - Two-Dimensional Numerical Modeling of Intracontinental Extension: A Case Study Of the Baikal Rift Formation
AU - Yang, H.
AU - Chemia, Zurab
AU - Artemieva, Irina
AU - Thybo, Hans
PY - 2015/12/1
Y1 - 2015/12/1
N2 - The Baikal Rift zone (BRZ) is a narrow (<80 km) and deep (> 10
km) active intra-continental basin, located at the boundary between the
Amurian and Eurasian Plates. Although the BRZ is one of the major
tectonically active rift zones in the world andit has been a subject of
numerous geological and geophysical studies, the geodynamic origin and
evolution of the BRZ is still debated. We applytwo-dimensional finite
difference code to model the lithosphere-scale de-formation in several
locations across the strike of the Baikal Rift zone. The model se-tup
takes an advantage of regional geophysical models on topography,basin
depth, the structure of the crust, lithosphere thickness, and the
location of major tectonic faults. Our goal is to determine the physical
models that reproduce reasonably well the ob-served deformation patterns
of the BRZ.We perform a systematic analysis of the pa-rameter space in
order to determinethe set of parameters that may define regional
li-thosphere evolution towards the present lithosphere structure, which
we further con-trol by gravity data, regional volcanism, and the age of
the BRZ formation. We dem-onstrate the roleof pre-existing faults on the
BRZ evolution and on formation of "off-rift" basins.
AB - The Baikal Rift zone (BRZ) is a narrow (<80 km) and deep (> 10
km) active intra-continental basin, located at the boundary between the
Amurian and Eurasian Plates. Although the BRZ is one of the major
tectonically active rift zones in the world andit has been a subject of
numerous geological and geophysical studies, the geodynamic origin and
evolution of the BRZ is still debated. We applytwo-dimensional finite
difference code to model the lithosphere-scale de-formation in several
locations across the strike of the Baikal Rift zone. The model se-tup
takes an advantage of regional geophysical models on topography,basin
depth, the structure of the crust, lithosphere thickness, and the
location of major tectonic faults. Our goal is to determine the physical
models that reproduce reasonably well the ob-served deformation patterns
of the BRZ.We perform a systematic analysis of the pa-rameter space in
order to determinethe set of parameters that may define regional
li-thosphere evolution towards the present lithosphere structure, which
we further con-trol by gravity data, regional volcanism, and the age of
the BRZ formation. We dem-onstrate the roleof pre-existing faults on the
BRZ evolution and on formation of "off-rift" basins.
KW - 8105 Continental margins: divergent
KW - TECTONOPHYSICS
KW - 8109 Continental tectonics: extensional
KW - 8159 Rheology: crust and lithosphere
KW - 8169 Sedimentary basin processes
M3 - Conference abstract for conference
T2 - AGU Fall Meeting
Y2 - 29 November 2010
ER -