AGU 2004 Sessions Related to MARGINS Research

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GP03: Crustal Rotation At Diffuse Plate Boundaries

This session aims to provide an arena for the integration of field- and plate-dynamic observations and a vehicle for the discussion of the driving mechanisms for rotation of crustal blocks in converging and extending margins. More.

H11: Role of Climate and Climate Change in Earth Surface Processes

Presenters are invited from a wide range of disciplines to contribute their findings on the controls of climate on hydrologic, geomorphic, and sedimentary systems. The goal is to highlight growing evidence for the important roles that climate and climate change play in surficial processes and products. More.

H23: Coupling Sediment Transport and Channel Morphology

This session addresses questions that need to be addressed to improve large-scale landscape evolution and source-to-sink transport models. Contributions are sought that relate sediment transport to the morphology of streams across a range of scales. More.

H40: Modeling Persistence in Solute Transport in Streams and Rivers

This session invites contributions that address mechanism analysis, mathematical modeling, parameter estimation, laboratory experiments, and field studies of transient storage-release and transport processes of both conservative and reactive solutes in natural rivers, streams, estuaries, coastal water, and wetlands. More.

H37: Geomorphic Processes and Landscapes: Posters

This general poster session welcomes contributions on geomorphic processes from the hillslope to the floodplain. More.

OS03: Nearshore Processes

Welcoming observational, theoretical, and modeling abstracts on the dynamics of waves, currents, and sediment transport from the shore to the shelf break. More.

OS04: Strata Formation on European Continental Margins

A variety of sedimentary settings on European continental margins represent important contrasts to coastal settings in North America. Investigators are encouraged to present the results of recent study into strata formation on European margins. More.

OS11: Mass Transfer from Source to Sink in New Guinea: an Interdisciplinary Perspective

Exciting new results from source-to-sink investigations of mass transfer from the terrestrial to marine environments of New Guinea will be presented. More. Detailed Abstract Information (Thursday p.m.). Poster Session Information (Friday, a.m.).

S08: Subduction Zone Seismogenesis

Contributions are encouraged from a wide range of observational and theoretical fields, concerning: Geodetic and/or seismological measurements of seismic and aseismic subduction zone source processes and their interpretation; geophysical and geological observations relating to factors that may control subduction seismogenesis; and new or improved techniques to model subduction zone behavior, source processes and seismicity. More.

SF05: Data and Services for Space and Earth Sciences

This session is about making diverse data usable and available to space and Earth science researchers and decision makers. More.

SF07: Challenging the boundaries in Earth science visualization

Present day software and hardware tools for scientific visualization have problems dealing with the size and multi-variate and distributed nature of rapidly expanding geophysical data sets. This session will bring together researchers who work on the development and use of new visualization tools in the Earth Sciences. More.

SF13: Cyberinfrastructure in Geochemistry

This session will focus on the utility and capabilities of existing and developing geochemical cyberinfrastructure efforts, with a view towards a coherent and unifying set of concepts and principles to organize and present empirical data in a way that can be used effectively by the broader geoscience community. More.

T4: Upper Mantle Structure and Dynamics as Revealed by Seismic Anisotropy, Tomography, and Modeling

This multidisciplinary session focuses on the nature of seismic anisotropy and other mapped structure in the Earth's upper mantle and discusses its possible geophysical and petrological explanations. One of three connected sessions focuses on regional subduction zone dynamics. Submissions are welcome from seismological and geodynamic studies focused on a wide range of length scales, as well as from any other relevant disciplines. More.

T12: Mantle Dynamics and Seismic Anisotropy in Subduction Zones

Contributions will include: Observations of anisotropy in subduction zones; independent seismic and field observations relevant to detecting partially molten or hydrated mantle; models of mantle flow and fluid migration; constraints from laboratory or theoretical mineral physics; and modeling contributions on other aspects of slab dynamics. More.

T13: Lithospheric Structure and Neotectonics of the Antarctic Plate

Recent aerogeophysical, seismic, and geodetic surveys, along with other geologic and geophysical studies, have begun to reveal the lithospheric structure and neotectonics of the Antarctic plate for the first time. This session focuses on a variety of solid earth topics that are essential for understanding the evolution of the plate. More.

T14: Convergent Plate Tectonics of the Mediterranean Region

Many features of other subduction zones are weakly expressed or missing in relation to subducted lithosphere identified beneath some of the Mediterranean thrust belts. This session invites contributions from a variety of disciplines that address the expression of plate tectonics and continental convergence in the Mediterranean region. More.

T17: New Developments in Ultrahigh-Pressure Tectonics and Metamorphism

Ongoing work in the field of ultrahigh-pressure tectonics and metamorphism continues to yield new discoveries. Papers are invited that relate to the macro- through micro-scale processes observed in the growing number of ultrahigh-pressure metamorphic terranes discovered in relation to subduction zones and exhumation of continental crust. More.

T18: Crust-Mantle Coupling in the Transpressive Zone of S. California

Observations of surface strain, the depth extent of faults, the nature of a mid-crustal decollement, and flow in the mantle, are key to understanding the coupling of motions and forces between the upper crust and mantle in southern California. Contributions are solicited that examine the three dimensional history of the margin, the current structure, and the dynamics of deformation and earthquakes in the transpressive zone. More.

T20: High Velocity Friction and Earthquake Generation Processes

This session focuses on the role of rock friction at seismic slip rates on earthquake nucleation and propagation, and on the consequences that large variations in frictional resistance on faults might have on the amount of damage earthquakes are capable of producing. More.

T22: Tectonic Wavelengths: Observations and Explanations

Although a lot of attention has been focused on quasi-fractal patterns, many tectonic and magmatic features display a well-defined wavelength. Examples abound at all scales, from microfolds, columnar jointing, temporal and spatial clustering in magmatic systems, thrust sequences, ridge segmentation, and intraplate gravity undulations. Possible controls for these phenomena include folding, cracking, gravitational instabilities, and reaction/infiltration fronts. More.

T23: AGU Special Session on Marine Paleoseismology

Fundamental concepts of earthquake occurrence commonly depend on records too short to effectively distinguish between models.  Marine paleoseismic techniques are evolving as effective tools for unraveling long earthquake records for faults systems in submarine and coastal environments. More.

T29: Tectonics and Continental Growth Processes in the Circum-Caribbean Region

Theories of continental formation rely on island arc accretion to continental margins as a primary tectonic process in post-Archean continental growth. More.

T30: The Earth's Deep Water Cycle

Water in Earth's crust and mantle has enormous effects on dynamics of solid Earth processes. Release of water through dehydration processes may enhance generation of melt and trigger earthquakes. Plate subduction may transport water into the Transition Zone and lower mantle. This session aims to bring together different disciplines to discuss the nature and temporal evolution of water cycling in the deep Earth. More.

V03: Chinese Continental Scientific Drilling (CCSD): Continental Deep Subduction and Exhumation Dynamics

The CCSD project is designed to unravel the structure and composition of the root zone of a large-scale, ultra-high pressure metamorphic belt between the North and South China Blocks. New geophysical and geological information together with previous findings are ready to quantify the processes of continental subduction and collision. New data from pre-pilot holes, a 3500m main hole, and field studies, will be presented. More.

V04: Rates and Time Scales of Magmatic Processes

Analytical and conceptual advances in petrology and geochemistry along with structural and geophysical observations have made it possible to quantify rates and time-scales of magmatic processes at active and ancient volcanoes. This session invites contributions that explore all facets of the rates and time scales of magmatic processes. More.

V05: Halogens in subduction zones

This session aims to trace the halogen behavior throughout the entire subduction process. It will address global halogen cycles, halogen influences on stability of key subduction zone minerals, and effects of halogens on melting behavior in the mantle. Contributions are encouraged from a wide range of disciplines to provoke stimulating discussions on these matters. More.

V06: The Role of Brines in Crustal Processes

NaCl, KCl, and CaCl2 brines play a wide and varied role in crustal processes, including dehydration of subducting oceanic crust, and evolution of magmas associated with volcanic processes. This session will bring together a diverse group of scientists to help consolidate our understanding of brines in general, and to ascertain more clearly where specific important questions and avenues for fruitful research lie. More.

V08: Active Submarine Volcanic and Hydrothermal Systems of Western Pacific Intra-Oceanic Arcs

Recent expeditions to the submarine arc volcanoes and back-arc spreading centers along the Izu-Bonin-Mariana, Tonga-Kermadec, and other intra-oceanic arcs of the western Pacific are rapidly increasing our knowledge base of these systems. This session invites submissions reporting focused seafloor/water column studies and broad regional syntheses of hydrothermal activity at intra-oceanic arcs. More.

V10: Quantifying Volcanic Eruption Fluxes

New tools, including miniature ultraviolet correlation spectrometers, thermal imagers, infrasound, and others, allow quantification of erupted flux with increased accuracy and temporal resolution. Abstracts are invited that characterize eruption flux and magnitude using novel analytical approaches and/or diverse and integrated technologies. More.

V12: Fluid/Melt Transport Through the Mantle Wedge at Subduction Zones

For this special session, scientific contributions are sought that employ innovative and multidisciplinary applications of petrological, geochemical, geophysical, and computational techniques towards constraining the movement of melts and fluids through the mantle wedge at subduction zones. More.

V15: Quantitative Constraints On Rates Of Crustal Reactions, Deformation And Mass Transfer

Knowledge of rates of reaction, deformation, and mass transfer - and factors that control those rates - is fundamental to understanding and modeling crustal evolution. Papers are invited that describe novel methods used to quantitatively constrain these rates (or relative rates) in margins or plate interiors based on laboratory or natural observations, or that describe process models wherein such rates are required and employed. More.

V17: Arenal Volcano: magma genesis, volcanological processes, and societal responses