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Subduction: Top to Bottom

Subduction: Top to Bottom

Gray E. Bebout (Editor), David W. Scholl (Editor), Stephen H. Kirby (Editor), John P. Platt (Editor)

ISBN: 978-1-118-66457-5

Mar 2013, American Geophysical Union

384 pages

Select type: O-Book

Description

Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 96.

Perhaps no other plate tectonic setting has attracted as diverse multidisciplinary attention as convergent margins. This has in part been spurred by the extremely tangible hazards imposed by subduction, particularly in the form of earthquakes and tsunamis and arc volcanism. Concern regarding these hazards is heightened by the tendency of convergent margins to be heavily populated coastal regions. There has also been great interest in convergent margin settings for their potential (and demonstrated capability) of producing economically important oil and gas reservoirs and ore deposits. The cycling of materials (e.g., CO2 at convergent margins has been recognized as potentially significantly effecting changes in our environment, in particular, impacting evolution of the hydrosphere and atmosphere. It is widely accepted that convergent margin accretion and arc magmatism have been largely responsible for continental crust formation over long periods of Earth's history.

Preface
Gray E. Bebout, David IF. Scholl, Stephen H. Kirby, and John P. Platt xi

What Goes In

Thermo-mechanical Evolution of Oceanic Lithosphere: Implications for the Subduction
Process and Deep Earthquakes (Overview)
Seth Stein and Carol A. Stein 1

Geochemical Fluxes During Seafloor Alteration of the Basaltic Upper Oceanic
Crust: DSDP Sites 417 and 418 (Overview)
Hubert Staudigel, Terry Plank, Bill White, and Hans-Ulrich Schmincke 19

The First Squeeze

Accretionary Mechanics With Properties That Vary in Space and Time (Overview)
DanM. Davis 39

Mountain Building in Taiwan and the Critical Wedge Model
Chi-Yuen Wang, Adam Ellwood, Francis Wu, Ruey-Juin Rau, and Horng-Yuan Yen 49

Sediment Pore-Fluid Overpressuring and Its Effect on Deformation at the Toe of the Cascadia
Accretionary Prism From Seismic Velocities
Guy R. Cochrane, J. Casey Moore, and Horna J. Lee 57

Oblique Strike-Slip Faulting of the Cascadia Submarine Forearc:
The Daisy Bank Fault Zone off Central Oregon
Chris Goldfinger, LaVerne D. Kulm, Robert S. Yeats, Cheryl Hummon, Gary J. Hufiile, Alan R. Niem, and Lisa C. McNeill 65


Fabrics and Veins in the Forearc: A Record of Cyclic Fluid Flow at Depths of < 15 km (Overview)
Donald M. Fisher 75

Large Earthquakes in Subduction Zones: Segment Interaction and Recurrence Times (Overview)
Larry J. Ruff 91

What Controls the SeismogenicP late Interface in SubductionZ ones?
Larry J. Ruff and Bart IF. Tichelaar 105

Displacement Partitioning and Arc-Parallel Extension: Example From the
Southeastern Caribbean Plate Margin
Hans G. Avd Lallemant 113

The Big Squeeze: Back From the Pressure Cooker

Thermal and Petrologic Structure of Subduction Zones (Overview)
Simon M. Peacock 119

Contrasting P-T-t Histories for BlueschistsF rom the Western Baja Terrane and the Aegean:
Effects of Synsubduction Exhumation and Backarc Extension
Suzanne L. Baldwin  135

Tectonic Uplift and Exhumation of Blueschist Belts Along Transpressional Strike-Slip Fault Zones
Paul Mann and Mark B. Gordon 143

Syn-Subduction Forearc Extension and Blueschist Exhumationin Baja California, Mexico
Richard L. Sedlock 155

Slip-History of the Vincent Thrust: Role of Denudation During Shallow Subduction
Marty Grove and Oscar M. Lovera 163

A Thermotectonic Model for Preservation of Ultrahigh-Pressure Phases
in Metamorphosed Continental Crust
W G. Ernst and Simon M. Peacock 171

Volatile Transfer and Recycling at Convergent Margins: Mass-Balance and Insights
From High-P/T Metamorphic Rocks (Overview)
Gray E. Bebout 179

The Big Squeeze: From Beneath the Arc

Intermediate-Depth Intra slab Earthquakes and Arc Volcanismas Physical Expressions of Crustal and
Uppermost Mantle Metamorphism in Subducting Slabs (Overview)
Stephen Kirby, E. Robert Engdahl, and Roger Denlinger 195

Subdueted Lithospheric Slab Velocity Structure: Observations and Mineralogical Inferences
George Helffich 215

Plate Structure and the Origin of Double Seismic Zones
Geoffrey A. Abers 223

Phase Equilibria Constraints on Models of Subduction Zone Magmatism (Overview)
James D. Myers and A. Dana Johnston 229

Deciphering Mantle and Crustal Signatures in Subduction Zone Magmatism (Overview)
Don P. Davidson 251

Describing Chemical Fluxes in Subduction Zones: Insights From
"Depth-Profiling" Studies of Arc and Forearc Rocks
Jeff Ryan, Julie Morris, Gray Bebout, and Bill Leeman 263

Boron and Other Fluid-Mobile Elements in Volcanic Arc Lavas: Implications for Subduction Processes
William P. Leeman 269

Effect of Sediments on Aqueous Silica Transport in Subduction Zones
Craig E. Manning 277

Does Fracture Zone Subduction Increase Sediment Flux and Mantle Melting in Subduction Zones?
Trace Element Evidence From Aleutian Arc Basalt
Bradley S. Singer, William P. Leeman, Matthew F. Thirlwalla, and Nicholas W. Rogers 285

Experimental Melting of Pelagic Sediment, Constraints Relevant to Subduction
Geoffrey T. Nichols, Peter J. Wyllie, and Charles R. Stern   293

The Influence of Dehydration and Partial Melting Reactions on the Seismicity
and Deformation in Warm Subducting Crust
Tracy Rushmet 299

Contrasting Styles of Mantle Metasomatism Above Subduction Zones:
Constraints From U!tramafic Xenoliths in Kamchatka
Pavel Kepezhinskas and Marc D. Derant 307

Suprasubduction Mineralization: Metal!o-Tectonic Terranes of the Southernmost Andes (Overview)
Eric P. Nelson 315

Hazards and Climatic Impact of Subduction-Zone Volcanism: A Global and Historical Perspective
Robert l. Tilling 331

The Biggest Squeeze: Slab Structure and Deep-Focus Earthquakes

Eclogite Formation and the Rheology, Buoyancy, Seismicity, and H20 Content of Oceanic Crust
Bradley R. Hacker 337

Double Seismic Zones, Compressional Deep Trench-Outer Rise Events, and Superplumes
Tetsuzo Seno and Yoshiko Yamanaka 347

Characteristics of Multiple Ruptures During Large Deep-Focus Earthquakes
Wang-Ping Chen, Li-Ru Wu, and Mary Ann Glennon 357

Imaging Cold Rock at the Base of the Mantle: The Sometimes Fate of Slabs? (Overview)
Michael E. Wysession  369