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Tectonic evolution, deep structure and metallogeny of the Kola Peninsula, arctic Russia

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This project aims to examine the various ways in which the Earth's crust in the Kola Peninsula was formed and developed over a time span of approximately three billion years. Models will be explored for the generation of useful mineral deposits in the stable continental trust. A major tool in the research will be the newly-established International Geolaboratory at the Kola superdeep borehole, which has reached a depth of 12.3 km into the crust and has an invaluable database extending back to 20 years of drilling.

The specific aims are to constrain tectonic and thermal models of crustal growth, evolution and accretion, and to integrate geological and geophysical data from a recent seismic experiment in Kola into a three-dimensional interpretation of deep crustal structure. The geological aims are as follows: fluid inclusion studies of samples from the Kola superdeep borehole, especially with respect to intra-crystalline deformation and fluid migration and equilibration; fluid inclusion studies of alkaline igneous rocks in the Kola Peninsula, including a reconnaissance search for possible hydrocarbon-bearing fluid inclusions; stable and radiogenic isotope geochemistry of samples from the Kola superdeep borehole and surrounding terrain, to provide data relevant to the geochronology of tectonic and magmatic events, source regions for magmatism related to crustal growth and accretion, and fluid mobility and mineral/wall rock-fluid equilibria within the mid to deep crust; and tectonic, thermal and magmatic synthesis of Precambrian crustal growth and accretion within the Kola Peninsula.

The way in which intra-crystalline deformation acted as an agent of fluid migration in the crust will be tested by using the borehole. In addition, geological and geophysical data will be integrated from a recent successful seismic experiment in Kola into a three-dimensional interpretation of deep crustal structure. The Kola borehole presents an unusual extra dimension not normally available to surface-based investigation and will thus assist in the geological interpretation of the seismic experiment.

This project will agree on common terminology, descriptions and definitions of structural and tectonic concepts and geochemical processes that will enhance international understanding. A terminological data base will be established, building on Mr Gillen's comprehensive Russian-English Earth Sciences encyclopaedic dictionary. A major result will be to assemble a realistic model of the deep crustal structure in the Kola terrain, based on the wealth of existing geological and geophysical data. Computer modelling of the lithosphere structure will yield results that will be incorporated subsequently into other international projects, including Europrobe. Central to this will be an attempt to combine seismic profile interpretations with three-dimensional gravity and sensitivity models of the lithosphere.

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University of Edinburgh
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11 Buccleuch Place
EH8 9LW Edinburgh
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Letzte Aktualisierung: 19 September 1996

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Permalink: https://cordis.europa.eu/project/id/INTAS-93-0754/de

European Union, 2024