Two-Dimensional Numerical Modeling of Intracontinental Extension: A Case Study Of the Baikal Rift Formation

H. Yang; Zurab Chemia; Irina Artemieva; Hans Thybo

Abstract

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.

Original language	English
Publication date	1 Dec 2015
Number of pages	1
Publication status	Published - 1 Dec 2015
Event	AGU Fall Meeting - Duration: 29 Nov 2010 → …

Conference

Conference	AGU Fall Meeting
Period	29/11/2010 → …

Keywords

8105 Continental margins: divergent
TECTONOPHYSICS
8109 Continental tectonics: extensional
8159 Rheology: crust and lithosphere
8169 Sedimentary basin processes

Access to Document

http://adsabs.harvard.edu/abs/2015AGUFM.T51E2943Y

Cite this

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title = "Two-Dimensional Numerical Modeling of Intracontinental Extension: A Case Study Of the Baikal Rift Formation",

abstract = "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.",

keywords = "8105 Continental margins: divergent, TECTONOPHYSICS, 8109 Continental tectonics: extensional, 8159 Rheology: crust and lithosphere, 8169 Sedimentary basin processes",

author = "H. Yang and Zurab Chemia and Irina Artemieva and Hans Thybo",

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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 -