What’s New and Exciting about Subduction Zones?
Week 1– Sept. 1: Overview
Zandt/Anderson
Stern (2002) review paper on subduction zones.
Stern, R. J., Subduction zones, Rev. Geophys., 40, 4, 1012, doi:10.1029/2001RG000108,
2002.
Week 2– Sept. 8: Silent Slip Events
Alvarado/Guynn
Recent geodetic observations have shown subduction zones are slipping episodically
in discrete aseismic events. What’s going on?
Miller, M.M., T. Melbourne, D.J. Johnson, and W.Q. Sumner, Periodic slow earthquakes
from the Cascadia subduction zone, Science, 295 (5564), 2423-2423, 2002.
Rogers, G., and H. Dragert, Episodic tremor and slip on the Cascadia subduction zone:
The chatter of silent slip, Science, 300 (5627), 1942-1943, 2003.
Week 3– Sept. 15: Subduction Erosion
Ducea/Volkmer
What happens to all that stuff that falls into the trench?
Clift, P., Vannucchi, P., Controls on tectonic accretion versus erosion in subduction zones:
Implications for the origin and recycling of the continental crust, Review of Geophysics,
v. 42, RG2001, 2004.
Week 4– Sept. 22: Flat Slabs
Guynn/Anderson
How do they get that way and what happens above them?
Kay, S.M., and M. C., Central Andean ore deposits linked to evolving shallow subduction
systems and thickening crust, GSA Today, 11, 4-9, 2001.
van Hunen, J., A.P. van den Berg, and N.J. Vlaar, A thermo-mechanical model of
horizontal subduction below and overriding plate, Earth and Planetary Science Letters,
182, 157-169, 2000.
Saleeby, J., Segmentation of the Laramide slab-evidence from the southern Sierra Nevada
Region, GSA Bulletin, v. 115, no. 6, 665-668, 2003.
Week 5– Sept. 29: Slab petrology & Phase Changes
Ozacar/Wagner
Mineral physics calculations and thermal models are combined to produce detailed
models of phase changes. Reality or fantasy?
Hacker, B.R., G.A. Abers, and S.M. Peacock, Subduction factory - 1. Theoretical
mineralogy, densities, seismic wave speeds, and H2O contents, Journal of Geophysical
Research-Solid Earth, 108 (B1), 2003.
Hacker, B.R., S.M. Peacock, G.A. Abers, and S.D. Holloway, Subduction factory - 2. Are
intermediate-depth earthquakes in subducting slabs linked to metamorphic dehydration
reactions?, Journal of Geophysical Research-Solid Earth, 108 (B1), 2003.
Peacock, S.M., Are the lower planes of double seismic zones caused by serpentine
dehydration in subducting oceanic mantle?, Geology, 29, 299-302, 2001.
Week 6– Oct. 6: Water and Melting
Valencia/Cardwell
Still a popular topic. Still a few slab melters around. What’s new?
Iwamori, H., Transportation of H2O and melting in subduction zones, Earth and Planetary
Science Letters, 160 (1-2), 65-80, 1998.
Schmidt, M.W., and S. Poli, Experimentally based water budgets for dehydrating slabs and
consequences for arc magma generation, Earth and Planetary Science Letters, 163 (1-4),
361-379, 1998.
Week 7– Oct. 13: Hydration and Dehydration Anderson/Alvarado
Wet mantle is getting major attention these days. What’s wet and who cares?
van Keken, P.E., The structure and dynamics of the mantle wedge, Earth and Planetary
Science Letters, 215, 323-338, 2003.
Jung, H., and Karato, S., Water-induced fabric transitions in olivine, Science, v. 293, 14601463, 2001.
Kerrick, D., Serpentinite seduction, Science, 298 (5597), 1344-1345, 2002.
Week 8– Oct. 20: Mantle Flow (in the mantle wedge) Guest: M. Billen
Corner flow? Trench parallel flow? How do fluid and melt movement interact with
solid flow?
Mehl, L., Hacker, B. R., Hirth, G., Kelemen, P. B., Arc-parallel flow within the mantle
wedge: Evidence from the accreted Talkeetna arc, south centeral Alaska, JGR, v. 108,
no. B8, 2375, 2003.
Smith, G.P., D.A. Wiens, K.M. Fischer, L.M. Dorman, S.C. Webb, and J.A. Hildebrand, A
complex pattern of mantle flow in the Lau backarc, Science, 292 (5517), 713-716, 2001.
Week 9– Oct. 27: Arc Volcanism Guest: Gill
Slab Penetration and Interaction with Convection
Volkmer/
How deep do they go? Do they interact with convection or are they convection?
Fukao, Y., S. Widiyantoro, and M. Obayashi, Stagnant slabs in the upper and lower mantle
transition region, Reviews of Geophysics, 39 (3), 291-323, 2001.
Insergueix-Filippi, D., L. Dupeyrat, E. Tric, and M. Menvielle, The influence of plate
kinematics, convection intensity, and subduction geometry on the Earth's upper-mantle
dynamics in the vicinity of a subduction zone, Geophysical Journal International, 138,
275-284, 1999.
Thermal State
Still an important parameter for calculating everything else. Subduction zones are
cool but how cool?
Peacock, S. M., Thermal and petrologic structure of subduction zones: in, Subduction: Top
to Bottom, Bebout, G., Scholl, D. W., Kirby, S. H., and Platt, J. P., eds., American
Geophysical Union, Wahington, D. C., 119-133, 1996.
Seismic Imaging
Wagner/
Tomographers are getting better images, how good are they and what can we learn
from them?
Zhao, D., Seismological structure of subduction zones and its implications for arc
magmatism and dynamics, Physics of Earth and Planetary Interiors, 127, 197-214, 2001.
Slab Breakoff or Detachment
Subduction Initiation
Coupled Mantle and Fluid Flow
Subduction Zone Dynamics
Subduction Zone Ore Deposits
Rips/Tears/Bends/Folds
Deformation of the Upper Plate
The Third Dimension of Subduction Zones