[margins-list] 2 Special Sessions at the 2009 Goldschmidt Conference

[margins-list at nsf-margins.org]

1.  Magma Generation and Evolution and Global Tectonics - A Symposium in 
Honor of Peter J. Wyllie (GC2009-Davos)
2.  What are the effects of crustal growth, recycling and weathering on 
the oceans, atmosphere, and biosphere?
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1.  Magma Generation and Evolution and Global Tectonics - A Symposium in 
Honor of Peter J. Wyllie (GC2009-Davos)

Dear Colleagues,

We would like to draw your attention and welcome you to a special 
symposium which we are organizing at the 2009 Goldschmidt
Conference (Davos, Switzerland, June 21 to 26, 2009) to honor Peter J. 
Wyllie for his life-long contributions to understanding how
the Earth works by means of experimental petrology 
(http://www.goldschmidt2009.org/themes?theme=4#session_04d).

Below are the important details:

[1] Title of the symposium:

"Magma generation and evolution and global tectonics - A symposium in 
honor of Peter J. Wyllie for his life-long contributions to
understanding how the Earth works by means of experimental petrology"

[2] Description:

Magma generation and its evolution from mantle through crust are among 
the most important processes that have led to chemical differentiation 
of our planet throughout its history. Our current understanding of magma 
generation processes owes much to experimental petrology, including the 
more than 300 original research contributions by Peter Wyllie and his 
co-authors. Peter correctly recognised early on the significance of 
volatiles in magma genesis in all tectonic settings. Remarkably, when 
plate tectonics theory was still in its infancy, Peter effectively 
brought that theory to a generation of students worldwide through his
book The Dynamic Earth, which lucidly explained why volcanoes occur 
where they do. This symposium honors Peter's lifetime contribution to 
petrology, aiming to bring together scientists from many parts of the 
world to discuss their new research on magma generation and 
differentiation processes. Topics include experimental petrology, 
igneous geochemistry and modeling, with emphasis on the use of petrology 
and geochemistry as a means to understanding how our planet works.

[3] Key dates:

(1) January 1st 2009 - Abstract submission open
(2) February 22nd 2009 - Abstract submission closed

[4] Convenors:

Yaoling Niu, Durham University, UK (yaoling.niu at durham.ac.uk)
Marjorie Wilson, University of Leeds, UK (m.wilson at see.leeds.ac.uk)
Ed Stolper, Caltech, USA (ems at gps.caltech.edu)
Hans Keppler, University of Bayreuth, Germany 
(hans.keppler at uni-bayreuth.de)

_________________________________
Yaoling Niu, Professor of Earth Sciences
Department of Earth Sciences
University of Durham
Durham DH1 3LE, UK
Phone: 44-19-1334-2311
Fax: 44-19-1334-2301
Yaoling.Niu at durham.ac.uk
http://www.dur.ac.uk/earth.sciences/staff/?username=dgl0yn

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2.  What are the effects of crustal growth, recycling and weathering on 
the oceans, atmosphere, and biosphere?

Dear MARGINS Community,

On behalf on my co-convenor, John Eiler, and myself I am sending you the
attached description for a special session at Goldschmidt 2009 entitled
"What are the effects of crustal growth, recycling and weathering on the 
oceans, atmosphere, and biosphere?".  We would very much welcome an 
abstract from you as part of this session and we would encourage you to 
share this information with colleagues. Full details on how submit 
abstracts can be found at http://www.goldschmidt2009.org

Deadline for submissions is 22nd February

Best regards
Peter

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What are the effects of crustal growth, recycling and weathering on the
oceans, atmosphere, and biosphere?

Convenors
Peter Clift, University of Aberdeen, UK
John Eiler, Caltech, USA

Growth and destruction of continental crust has important consequences 
for the development of the atmosphere, hydrosphere and biosphere. As the
continents were constructed and the relative volume of the ocean basins
shrank relative sea level must have risen, reducing continental erosion
rates, as continental freeboard stabilized. As the crust has been 
reworked by orogeny this must have influenced global sealevel via 
relative enlargement of the ocean basins and increased weathering rates 
as silicate rocks were exposed and eroded. Exhumation and weathering of 
the Himalaya has been linked to long-term Cenozoic global cooling, while 
the burial of large volumes of organic carbon in the submarine fans 
associated with orogeny would be expected to also drive long term 
climate change. The chemistry of the oceans, mostly notably the Sr and 
Os isotope compositions, are controlled by the riverine flux from the 
continents, in turn linked to crustal reworking. The reworking of 
continental crust in continental collision zones delivers much of the 
eroded =B3excess=B2 crust to the oceans where it is susceptible to 
subduction and loss back to the upper mantle. In this session we invite 
contributions from researchers examining the interactions between Earth 
surface processes and the recycling of continental crust.  We particular 
focus on the feedbacks between the two systems and how these have varied 
over long periods of Earth history.

Keynote speaker: Christian France-Lanord, Nancy, France
Invited speaker: Andrew Kurtz, Boston University, Youngsook Huh, Seoul
National University, Korea

_____________________________________
Peter D. Clift
Kilgour Professor
Department of Geology & Petroleum Geology
University of Aberdeen
Meston Building, Kings College
Aberdeen, AB24 3UE
United Kingdom

Tel: +44 (0) 1224 273456; Fax +44 (0) 1224 272785: E-mail:
p.clift at abdn.ac.uk

http://www.abdn.ac.uk/~wpg008/PChomepage.html