[margins-list] EGU Sessions and SSA Sessions

[margins-list at nsf-margins.org]

1a & b.  2010 EGU South and Central subduction zones and 2010 EGU Lesser 
Antilles convergent margin sessions
2a & b.  SSA Special Session Announcement and SSA session on Cascadia 
(and other) Subduction Zone Earthquake

__________________________________________________________________


1a.  2010 EGU South and Central subduction zones Session

We invite you to submit abstracts related to South and Central
subduction zones at the EGU meeting 2-7 May 2010 in Vienna*.
Please find a session description in the following.
The Dead-line for abstract submission is 18 January 2010

Seismogenesis and neotectonics along the South and Central American
subduction zones*

In subduction zones, structure, kinematics and physical parameters
affect the margin tectonics as well as the strain loading in the
seismogenic zone. Investigating the structural styles and seismogenesis
in subduction zone thus requires multidisciplinary observations and
modelling.

South and Central American subduction zones show a wide range of
interrelated structural, tectonic and seismic characteristics, which
vary tremendously across individual margin segments. These segments
undergo subduction erosion or accretion, transient and permanent
deformation, uplift or subsidence, great subduction earthquakes,
slow-slip events or creep, and are associated with various orogenic
styles. This high variability and the numerous recent offshore and
onshore geoscientific studies conducted along the South and Central
American subduction zones provide a great opportunity to investigate
processes and parameters that control the seismogenic, tectonic and
kinematic behaviour. Scientists working on all these aspects through
observation and/or modelling approaches are welcome to this session.

*Conveners*: Boris Marcaillou, Jean-Yves Collot, Paola Vannucchi,
Alcinoe Calahorrano

*Contact* : boris.marcaillou at univ-ag.fr


1a.  2010 EGU South and Central subduction zones Session

We invite you to submit abstracts related to *South and Central 
subduction zones *at the EGU meeting *2-7 May 2010 in Vienna*. Please 
find a session description in the following.
*The Dead-line for abstract submission is* *18 January 2010*

*TS8.7/GD5.7/SM3.4*

*Seismogenesis and neotectonics along the South and Central American 
subduction zones*

In subduction zones, structure, kinematics and physical parameters 
affect the margin tectonics as well as the strain loading in the 
seismogenic zone. Investigating the structural styles and seismogenesis 
in subduction zone thus requires multidisciplinary observations and 
modelling.

South and Central American subduction zones show a wide range of 
interrelated structural, tectonic and seismic characteristics, which 
vary tremendously across individual margin segments. These segments 
undergo subduction erosion or accretion, transient and permanent 
deformation, uplift or subsidence, great subduction earthquakes, 
slow-slip events or creep, and are associated with various orogenic 
styles. This high variability and the numerous recent offshore and 
onshore geoscientific studies conducted along the South and Central 
American subduction zones provide a great opportunity to investigate 
processes and parameters that control the seismogenic, tectonic and 
kinematic behaviour. Scientists working on all these aspects through 
observation and/or modelling approaches are welcome to this session.

*Conveners*: Boris Marcaillou, Jean-Yves Collot, Paola Vannucchi, 
Alcinoe Calahorrano

*Contact* : boris.marcaillou at univ-ag.fr


1b. 2010 EGU Lesser Antilles convergent margin session

We invite you to submit abstracts related to *Lesser Antilles convergent 
margin** *at the EGU meeting *2-7 May 2010 in Vienna*. Please find a 
session description in the following.
*The Dead-line for abstract submission is* *18 January 2010*

*TS6.8/GD5.6/NH4.14/SM3.6*

*Lesser Antilles convergent margin: subduction processes and resulting 
tectonic deformation, platform evolution, seismogenesis, and 
tsunamogenic hazards.*

Caribbean-Atlantic plate convergence at the Lesser Antilles Arc resulted 
in a heterogeneous arc and fore-arc tectonic evolution but lacks large 
subduction earthquakes in the historical record. Similar poor records 
previously led to dramatically underestimate the earthquake and tsunami 
hazard at other convergent margins. The varying obliquity of the 
convergence, subducting topographic heterogeneities and compositional 
differences of the subducted material along the arc generates 
significant along-strike variations in the stress and strain regime, 
fore-arc tectonics, and paleoenvironmental evolution of carbonate 
platforms.

Several geoscientific marine cruises and onland campaigns could be 
recently carried out. Presentations of their first observational results 
and interpretations may provide the broader community with new insights. 
This session raises the opportunity, by confrontation to current 
knowledge and models, to advance our understanding of the complex 
interplay between interplate coupling, oceanic plate and margin 
structure, seismic and aseismic deformation, in the evolution of 
subduction zones, fore-arc and platforms sedimentation and tectonics and 
associated seismic and tsunamogenic hazards.

Our session calls together scientists working on aspects of the 
geophysics and geology of the Lesser Antilles with a focus on subduction 
processes and structures, tectonic and neotectonic deformation patterns, 
carbonate platform evolution and earthquake and tsunamis hazards.

*Conveners*: Boris Marcaillou, Alfred Hirn, Ernst Flüeh

*Contact* : boris.marcaillou at univ-ag.fr

__________________________________________________________________

2a. SSA Special Session Announcement

The 2010 Seismological Society of America meeting abstract submission 
deadline looms (January 12, 2010). The meeting is in Portland, Oregon on 
April 21-23, 2010. There have been a large number of recent seismic 
studies in the Pacific Northwest and many interesting scientific results 
so please consider presenting your research in the following session:

Seismic Structure and Geodynamics of the High Lava Plains and Greater 
Pacific Northwest

Description:

The High Lava Plains (HLP) of Oregon has long represented an enigmatic 
region of massive tectonomagmatism in the Pacific Northwestern United 
States with poorly understood relationships to the Columbia River Basalt 
sequence and the time-progressive tracks of both Newberry and Snake
River Plain / Yellowstone rhyolitic volcanism. These events also tie 
directly to broader-scale mantle dynamics, including ongoing subduction 
of the Juan de Fuca plate system, extension across most of the Great 
Basin, and regional instability of lithosphere over a range of spatial 
scales.  To provide new constraints on the structure and dynamics of 
these terranes, the area has been assaulted over the past 5 years by a 
host of high-density temporary broadband seismic networks, including 
EarthScope=92s USArray Transportable Array, the High Lava Plains 
Broadband seismic experiment, and several USArray Flexible Array 
experiments. We encourage contributions to this session that not only
address HLP-centered investigations, but also examine the structure and 
dynamics of the broader Pacific Northwestern United States and 
surrounding regions.

See details about the the abstract submission process at:  
http://www.seismosoc.org/meetings/2010/

Feel free to contact conveners Matt Fouch (fouch at asu.edu), David James 
(james at dtm.ciw.edu), or Randy Keller (grkeller at ou.edu) if you have any 
questions.


2b. SSA session on Cascadia (and other) Subduction Zone Earthquake

We would like to encourage you to submit an abstract to the SSA special
session entitled, "Characterizing the Next Cascadia Earthquake and
Tsunami." Next week's deadline, Tuesday Jan 12th, is fast approaching.
The SSA 2010 Annual Meeting will be held April 20-23 in Portland, OR.

Abstract submission guidelines and meeting information can be found
here: http://www.seismosoc.org/meetings/

Session description:

New insights into the Holocene rupture history of the Cascadia
subduction zone, the structure of its forearc, and episodic tremor and
slip events located down-dip of the seismogenic zone are redefining
source models aimed at characterizing the next megathrust earthquake and
tsunami in the Pacific Northwest. We also encourage submissions from
those addressing similar issues in other subduction settings, and
encourage comparisons with Cascadia.  This session will feature new
research in the fields of geology, seismology and geodesy that have led
to improvements in understanding the seismic potential of the Cascadia
megathrust. Of particular interest to this session are studies that
provide better constraints on the width of the rupture zone, the=20
magnitude of slip, potential fault segmentation and highlight remaining
uncertainties. We also encourage submissions that address how new
findings can be used to reduce human losses from future megathrust
earthquakes and tsunamis, in particular, assessments of seismic and
tsunami hazards for mitigation purposes.

Please consider submitting an abstract to this special Subduction Zone
session.   Don't hesitate to contact one of us with questions of if you
need assistance.

Rob Witter and Chris Goldfinger
Session Conveners

Dr. Chris Goldfinger
College of Oceanic and Atmospheric Sciences
Oregon State University
1+ 541 737 5214  fax 1+ 541 737 2064