Dear colleagues,


        Beate Orberger, Axel Hofmann and myself would like to draw your 
attention to a special session (Theme 3: Early earth from Mantle to 
microbes; session 03F) at the 18^th Annual Goldschmidt Conference to be 
held on *13 - 18 July 2008* in Vancouver, Canada entitled:


*'Hydrothermal impact on the early Precambrian seawater composition as 
recorded by banded iron formations, black shales, and other proxies'*

 

Convenors: Andrey Bekker, Axel Hofmann, and Beate Orberger

Keynote Speaker: Boswell Wing, McGill University

Hydrothermal processes have strong impacts on seawater composition, 
nutrient contents, productivity, ocean circulation and redox state. 
Multiple lines of evidence suggest that these processes were more 
important when mantle heat flux was higher in the early Precambrian. 
Water-rock interaction likely released large amounts of trace metals 
that strongly influenced the biogeochemistry and productivity in the 
early oceans. Giant metal deposits formed, and diverse microbial 
communities affected the carbon, sulphur and nitrogen ocean cycles. 
Banded iron formations, jaspers, cherts, black shales and other marine 
sedimentary rocks are ideal proxies to characterize, evaluate, and model 
the importance of hydrothermal activity. This session seeks 
contributions from geochemical and biogeochemical studies of the Archean 
and Paleoproterozoic rock record, theoretical modeling and experimental 
studies.

 

We would like to inform you and invite for contribution. Please send 
this mail to your colleagues who might be interested in this session.

The web-site link is  http://www.goldschmidt2008.org/themeView?theme=3

The Abstract deadline is March 1^st , 2008. You can also find 
information for abstract submission at:

http://www.goldschmidt2008.org/abstracts/instructions

 

Please feel free to contact us if you have any questions.

Best,

 

Beate Orberger
Département des Sciences de la Terre
UMR IDES 4818
Université Paris  Sud XI
Bât. 509
F-91405 ORSAY Cedex
France
Tel. 00 33 1 69 15 49 29
Fax. 00 33 1 69 15 48 63
http://geosciences.geol.u-psud.fr/site_perso/Orberger/Orberger.html
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Andrey Bekker
Assistant Professor
Department of Geological Sciences
University of Manitoba
125 Dysart Road (Wallace Building)
Winnipeg, Manitoba, R3T 2N2
Canada
Phone: 1-204-474 7343
Fax: 1-204-474 7623
E-mail: [log in to unmask] <mailto:[log in to unmask]>

 

Axel Hofmann
School of Geological Sciences
University of KwaZulu-Natal
Durban, South Africa
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