Impacts in Precambrian Shields

1. Front Matter

   Pages I-XIII

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2. The Impact Cratering Record of Fennoscandia — A Close Look at the Database

   • Andreas Abels, Jüri Plado, Lauri J. Pesonen, Martti Lehtinen

   Pages 1-58

3. Re-examining Structural Data from Impact Craters on the Canadian Shield in the Light of Theoretical Models

   • Michael R. Dence

   Pages 59-79

4. Popigai Crater: General Geology

   • Victor L. Masaitis

   Pages 81-85

5. Geophysics and Petrophysics of the Popigai Impact Structure, Siberia

   • Mark Pilkington, Lauri J. Pesonen, Richard A. F. Grieve, Victor L. Masaitis

   Pages 87-107

6. U-Pb Analyses of Zircons from the Popigai Impact Structure, Russia: First Results

   • Richard Armstrong, Sergei Vishnevsky, Christian Koeberl

   Pages 109-116

7. Impact-Generated Hydrothermal Systems: Data from Popigai, Kara, and Puchezh-Katunki Impact Structures

   • Mikhail V. Naumov

   Pages 117-171

8. Geology and Petrography of the Zapadnaya Impact Crater in the Ukrainian Shield

   • E. P. Gurov, E. P. Gurova, T. M. Sokur

   Pages 173-188

9. Bosumtwi Impact Crater, Ghana: A Remote Sensing Investigation

   • Rüdiger Wagner, Wolf Uwe Reimold, Dion Brandt

   Pages 189-210

10. Geochemistry of Soils from the Bosumtwi Impact Structure, Ghana, and Relationship to Radiometric Airborne Geophysical Data

    • Daniel Boamah, Christian Koeberl

    Pages 211-255

11. Tektite Origin in Oblique Impacts: Numerical Modeling of the Initial Stage

    • Natalia Artemieva

    Pages 257-276

12. Geology and Magnetic Signatures of the Neugrund Impact Structure, Estonia

    • Sten Suuroja, Tarmo All, Jüri Plado, Kalle Suuroja

    Pages 277-294

13. Natural Resources of the Kärdla Impact Structure, Hiiumaa Island, Estonia

    • Kalle Suuroja

    Pages 295-306

14. Seismic Correlation of the Mjølnir Marine Impact Crater to Shallow Boreholes

    • Filippos Tsikalas, Jan Inge Faleide, Olav Eldholm, Henning Dypvik

    Pages 307-321

15. Numerical Modeling of Impacts into Shallow Sea

    • Valery V. Shuvalov

    Pages 323-336

16. Back Matter

    Pages 337-337

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The present volume is the result of activities within the scientific programme "Response of the Earth System to Impact Processes" (IMP ACT) of the European Science Foundation (ESF). The ESF is an association of 67 national member organisations devoted to scientific research in 24 European countries. The IMPACT programme is aimed at understanding meteorite impact processes and their effects on the Earth System. Launched in 1998 for a duration of 5 years, the programme is now supported by 15 ESF membership countries. The programme of meteorite impact research and operates through deals with all aspects workshops, exchange programs, and short courses. The 4th IMPACT programme workshop "Meteorite Impacts in Precambrian Shields" took place on May 24-28, 2000, in Lappajarvi, western Finland. A total of 84 scientists from 19 countries from Europe, North America, and Africa participated in the workshop. During the workshop, 43 oral, 31 poster, and several video presentations were made. An exhibition of impactite rocks from Finnish craters and two excursions were organised. The excursion to impact melt rock outcrops of the Lappajarvi structure took place during the workshop. The Karikkoselka and Saaksjarvi impact structures in south-central Finland were visited during the post-meeting excursion.

• Impact Craters
• Impacts
• Petrophysics
• Precambrian
• Shields
• geochemistry
• geophysics
• impact structure

• Institute of Geology, University of Tartu, Tartu, Estonia

  Jüri Plado

• Division of Geophysics, University of Helsinki, Helsinki, Finland

  Lauri J. Pesonen

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