TY  - JOUR
A1  - Baes, Marzieh
A1  - Sobolev, Stephan
A1  - Gerya, Taras V.
A1  - Brune, Sascha
T1  - Plume-induced subduction initiation
BT  - single-slab or multi-slab subduction?
JF  - Geochemistry, geophysics, geosystems
N2  - Initiation of subduction following the impingement of a hot buoyant mantle plume is one of the few scenarios that allow breaking the lithosphere and recycling a stagnant lid without requiring any preexisting weak zones. Here, we investigate factors controlling the number and shape of retreating subducting slabs formed by plume-lithosphere interaction. Using 3-D thermomechanical models we show that the deformation regime, which defines formation of single-slab or multi-slab subduction, depends on several parameters such as age of oceanic lithosphere, thickness of the crust and large-scale lithospheric extension rate. Our model results indicate that on present-day Earth multi-slab plume-induced subduction is initiated only if the oceanic lithosphere is relatively young (<30-40 Myr, but >10 Myr), and the crust has a typical thickness of 8 km. In turn, development of single-slab subduction is facilitated by older lithosphere and pre-imposed extensional stresses. In early Earth, plume-lithosphere interaction could have led to formation of either episodic short-lived circular subduction when the oceanic lithosphere was young or to multi-slab subduction when the lithosphere was old.
KW  - subduction zone
KW  - plume
KW  - numerical model
KW  - singleslab
KW  - multi-slab
Y1  - 2020
U6  - https://doi.org/10.1029/2019GC008663
SN  - 1525-2027
VL  - 21
IS  - 2
PB  - American Geophysical Union
CY  - Washington
ER  - 
TY  - GEN
A1  - Baes, Marzieh
A1  - Sobolev, Stephan Vladimir
A1  - Gerya, Taras V.
A1  - Brune, Sascha
T1  - Plume-induced subduction initiation
BT  - Single-slab or multi-slab subduction?
T2  - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - Initiation of subduction following the impingement of a hot buoyant mantle plume is one of the few scenarios that allow breaking the lithosphere and recycling a stagnant lid without requiring any preexisting weak zones. Here, we investigate factors controlling the number and shape of retreating subducting slabs formed by plume-lithosphere interaction. Using 3-D thermomechanical models we show that the deformation regime, which defines formation of single-slab or multi-slab subduction, depends on several parameters such as age of oceanic lithosphere, thickness of the crust and large-scale lithospheric extension rate. Our model results indicate that on present-day Earth multi-slab plume-induced subduction is initiated only if the oceanic lithosphere is relatively young (<30-40 Myr, but >10 Myr), and the crust has a typical thickness of 8 km. In turn, development of single-slab subduction is facilitated by older lithosphere and pre-imposed extensional stresses. In early Earth, plume-lithosphere interaction could have led to formation of either episodic short-lived circular subduction when the oceanic lithosphere was young or to multi-slab subduction when the lithosphere was old.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1167 
KW  - subduction zone
KW  - plume
KW  - numerical model
KW  - singleslab
KW  - multi-slab
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-522742
SN  - 1866-8372
IS  - 2
ER  -