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Contenu archivé le 2022-12-23

Petrology and geodynamics of pre-Alpine complexes in the Caucasian segment of the Mediterranean fold belt

Objectif

A detailed understanding of the pre-Alpine crystalline basement of the Caucasus will provide important background data on the late Precambrian and early Phanerozoic evolution of that part of the European Plate that was subsequently involved in Alpine orogenesis. Currently, the different tectonic units of the Caucasus are not well understood in terms of their structural or metamorphic and magmatic evolution.

The main objectives of the project are:

1. To constrain the structural geology within individual terranes, the relationship between folds, thrusts and fold nappes within individual terranes and the structures developed within the suture zones that separate the terranes, and to identify late-stage structures that deform more than one terrane and the sutures that separate them;
2. To determine the metamorphic P-T-t histories of different crustal terranes that make up the Caucasian segment of the Mediterranean foldbelt;
3. To study the inter-relationships within the Caucausus between high-grade regional metamorphism, anatexis and granite generation;
4. To elucidate the relationships between upper crustal deformation and granite emplacement;
5. To constrain the polycyclic nature and geodynamic framework of the Precambrian to Palaeozoic tectonic, metamorphic and magmatic events and thus to elaborate on the tectonic evolution and assembly of the various terranes that make up the Caucasian segment.

To achieve this we plan a multi-disciplinary project involving detailed field mapping of lithologies, structures and metamorphic parageneses; structural analysis of the deformed terranes that make up the pre-Alpine basement of the Caucasus; studies of the metamorphic history, and a detailed geochronological investigation of the metamorphic and magmatic history of the region.

Deformation, metamorphism, melting, granite generation and emplacement are fundamental processes which form a continuum within any orogenic belt which involves thickening of the continental crust. Evaluation of this continuum, underpinned by detailed geochronology of metamorphic and magmatic events, should provide a full understanding of the tectonothermal evolution of the complex terranes that make up the Caucasian segment of the Mediterranean foldbelt argues that it exhibits all elements of this continuum. Hence, the tectonothermal history of the region will be constrained by combining metamorphic data (= P-T) with structural data (=d) and isotopic data (=t) to derive a full P-T-t-d analysis of the region. The granite genesis and emplacement history is essentially a subset of the metamorphic process and will be included within this analysis.

A second, major aim of the project is to train young scientists from the participating NIS partners in modern methods of structural geology, petrology, geochemical analysis and geochronology. To this end young scientists from each of the NIS partners will visit labs at the INTAS partners full sufficiently long to receive training in these elements and, under guidance, to collect and interpret data critical to the completion of the project.

Appel à propositions

Data not available

Régime de financement

Data not available

Coordinateur

Kingston University
Contribution de l’UE
Aucune donnée
Adresse
Pemrhyn Road
KT1 2EE Kingston-upon-Thames
Royaume-Uni

Voir sur la carte

Coût total
Aucune donnée

Participants (4)