Relation between rheological properties and the stress state in subducting slabs

Earth, Planets and Space

Table 1 Geometrical and physical properties for model layers in Model CV

Domain	Density	Thickness or depth range	Viscosity	Cohesion	Effective coefficient of friction	Maximum yield stress
	ρ	h or z	η_vis	c	ϕ	σ_max
	kg/m³	km	Pa s	MPa		MPa
OPFC	2900	h = 30	1 × 10²⁴	30	0.6	200
OPC	2900	h = 30	3 × 10²³	30	0.6	200
OPFM	3300	h = 40	1 × 10²⁴	30	0.6	200
OPM1	3300	h = 40	3 × 10²³	30	0.6	200
OPM2	3300	h = 120	1 × 10²⁴	30	0.6	200
OC	3000–3360^*1	h = 10	1 × 10²²	30^*2	0.6^*2	200
SP1	3360	h = 30 or 50	1 × 10²³ or 1 × 10²⁴	30	0.6	200
SP2	3360	h = 30	1 × 10²²	30	0.6	200
UM	3300	z = 0–410	1 × 10²⁰	30	0.6	200
TM	3300	z = 410–660	3 × 10²⁰	30	0.6	200
LM	3300	z = 660–2900	2 × 10²²	30	0.6	200

OPFC overriding plate forearc crust, OPC overriding plate crust, OPFM overriding plate forearc mantle, OPM1 overriding plate arc–back-arc mantle, OPM2 overriding plate cratonic mantle, OC oceanic crust, SP1 cool upper lithospheric mantle of subducting plate, SP2 warm deeper lithospheric mantle of subducting plate, UM upper mantle, TM mantle transition zone, and LM lower mantle
^*1 Linear increase with depth in the depth range of 15–65 km
^*2c = 1 MPa and ϕ = 0.005 for z < 120 km