Archaean Environment: the
habitat of early life
Workshop in Mekrijärvi,
24-30 August 2009
For some photos of the workshop click here
Arndt, Nicholas: Welcome
Nicholas: Archean volcanism - implications for
mantle dynamics and surface conditions
Buick, Roger: Evidence of early life from drilling in the Pilbara
van Hunen, Jeroen: Geodynamics of the Archean
Konhauser, Kurt: Banded iron formations and the
evolution of life
McKenzie, Judy & Vasconcelos, Chris: Modern and ancient stromatolites
Mojzsis, Steve: Formation and evolution of the earliest continents
Sorjonen-Ward, Peter & Hölttä, Pentti: Archean geology of the Karelian
province, Fennoscandian shield
Discussion, posters, microscopy
Tuesday. Field trip to the nearby Ilomantsi greenstone belt
mafic and felsic volcanic rocks, c. 2.75 Ga in age
- Banded iron
formations, metasediments, gold mineralization, etc.
Those people who have access to the journals of the Geological Survey of
Finland can find information on the Ilomantsi greenstone belt in Geological
Survey of Finland, Special Paper 17, 1993: Geological development, gold
mineralization and exploration methods in the late Archean Hattu schist
belt, Ilomantsi, eastern Finland, eds Pekka A. Nurmi and Peter Sorjonen-Ward.
Information on the excursion stops will be given later.
Wednesday. Short course Part II:
used to study Archean rocks
Bau, Michael: Geochemistry methods in studies of Archean chemical sediments
Farquhar, James: Sulfur isotopes
Hofmann, Axel: Field methods
Karhu, Juha: Carbon cycle and stable isotopes
and the atmosphere of the Earth
Rosing, Minik: Thermodynamics, chemical modelling: Introduction to
Westall, Frances: Fossil evidence of early life and comparative planetology
Discussion, posters, microscopy
Brian: Iron sedimentation in Archean oceans
Bekker, Andrey: Sulfidic Organic-Rich Shales in the Archean Low-Sulfate
Ocean: Evidence for Transient Oxygenated Conditions, Enhanced Volcanism, or
Low Sedimentation Rates?
Grassineau, Nathalie The evolution of a Late Archaean basin seen through the
adaptation of microbial activities
Hoffmann, J. Elis: The Origin of TTGs inferred from high-precision HFSE
Hofmann, Axel: Multiple sulphur and iron isotope composition of detrital
pyrite in Archaean sedimentary rocks: a new tool for provenance analysis
Huhma, Hannu: Age and Sm-Nd results on the Archean in Finland
Itävaara, Merja: Outokumpu deep borehole - what microbes are there?
Mason, Paul: How can we link microscopic variations in S isotopes in Archean
pyrites to early microbial metabolisms?
Mojzsis, Stephen: Crossroads: Exploration of the earliest history of water
Rosing M.T. & Bird D.K.: The oldest sediment core on Earth
Martin, Tony: Evolution of the Belingwe Greenstone Belt, Zimbabwe
Sharkov, Evgenii: Irreversible evolution of the Earth and the terrestrial
planets from petrological point of view.
Vasconcelos, Crisogono: Modern stromatolites from Lagoa Salgada: An example
of methanogenic processes on carbonate precipitation
Haugaard Nielsen, Rasmus: The origin and depositional environment of a
meso-Archaean Banded Iron Formation and its related supracrustals -
petrological and geochemical evidence from the ~2.9 Ga Itilliarsuk
greenstone belt, NW Greenland.
Medvedev, Pavel Early Precambrian Fossils of the Eastern Fennoscandian
Næraa, Tomas: Archean crust development from a zircon Hf isotope
Slabunov, Alexander, Lokhov K.I., Sibelev O.S.: Archean carbonate rocks:
endogenous or sedimentary? Example from the Belomorian province,
Svetov, Sergei: Archaean komatiites of central Russian Karelia
Weber, Tom: Assessing mass dependent isotope fractionation of Cerium
departure from Mekrijärvi, accommodation and traditional Karelian dinner
in hotel Bomba, Nurmes
ultramafic sequences: komatiites, pillow basalts (c. 2.8 Ga), metasediments.
For a field guide see the web page
and pages 98-110 there.
Accommodation and dinner in Hotel Kajaani,
field guide see pages 4-31 in the link above.
Hotel Cumulus, Kuopio,
Sunday 30. Departure from Hotel Cumulus to the Kuopio
Papers and posters
Presentations at the
workshop will mostly be given by invited speakers, oral papers by other
participants are presented in the symposium. Poster presentations are
The workshop venue will
be the Mekrijärvi Research Station, which is a field station maintained
by the University of Joensuu, for teaching and research in the natural
sciences and ethnoloy. Information on facilities at Mekrijärvi can be
found on the web site (http://www.joensuu.fi/mekri/valikko/index_7.html).
Mekrijärvi is about 80 km east of the city of Joensuu, (http://www.joensuu.fi/mekri/).
Joensuu is about 400 km northeast of Helsinki and there are regular
daily train and air connections.
Number of participants
We shall have c. 50 participants.
arriving outside Finland are recommended to book a return flight to
Kuopio. On the 23.08.2009 a Finnair flight will arrive at the Kuopio
airport at 17.40 and a Blue1 flight at 15.30. There will be a bus
transport from Kuopio to Mekrijärvi (about three hours) leaving after
the arrival of the Finnair flight at around 18.00. The bus will stop at
the Joensuu railway station at around 20.00. Timetables for planes and
trains can be found at www.finnair.fi,
The weather in
late August in the area can be very variable, from warm and sunny (+20
ºC) to cool and rainy (+10-15 ºC). Waterproof clothing and hiking boots
or rubber boots or hiking boots are therefore recommended in case of
rain on the field trips. Transport in the field will be by bus with
short walks to outcrops in generally easy terrain. The worst of the
mosquito season will over by the end of August, but there are still some
insects, such as moose flies, which can occasional cause allergic
reaction. To compensate for this however, berries and edible mushrooms
and double rooms in the residences of the Research Station, during the
field trip in above mentioned hotels.
All travel and accommodation costs will be covered by
the European Science Foundation.
Géodynamique des Chaînes Alpines
1381 rue de la Piscine
38401 St Martin d’Hères, France
Tel. +33 4
Dr. Pentti Hölttä
Geological Survey of Finland
P.O. Box 96
FI-02151 Espoo, Finland
Tel. +358 20502312
Fax +358 2055012
Geological Survey of Finland
P.O. Box 1237
FI-70211 Kuopio, Finland
Fax +358 2055013
Swedish Museum of
NORDSIM Laboratory for Isotope Geology
P.O. Box 50 007
104 05 Stockholm, Sweden
Tel +46 8 5195